[go: up one dir, main page]

WO1993015536A1 - Fibre a laser pompee par une diode laser, pouvant etre configuree pour des applications haute puissance - Google Patents

Fibre a laser pompee par une diode laser, pouvant etre configuree pour des applications haute puissance Download PDF

Info

Publication number
WO1993015536A1
WO1993015536A1 PCT/US1993/000887 US9300887W WO9315536A1 WO 1993015536 A1 WO1993015536 A1 WO 1993015536A1 US 9300887 W US9300887 W US 9300887W WO 9315536 A1 WO9315536 A1 WO 9315536A1
Authority
WO
WIPO (PCT)
Prior art keywords
fibre
cladding
laser
diode
core
Prior art date
Application number
PCT/US1993/000887
Other languages
English (en)
Inventor
John D. Minelly
Elizabeth R. Taylor
Original Assignee
Amoco Corporation
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Amoco Corporation filed Critical Amoco Corporation
Publication of WO1993015536A1 publication Critical patent/WO1993015536A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
    • H01S3/09—Processes or apparatus for excitation, e.g. pumping
    • H01S3/091—Processes or apparatus for excitation, e.g. pumping using optical pumping
    • H01S3/094—Processes or apparatus for excitation, e.g. pumping using optical pumping by coherent light
    • H01S3/094003—Processes or apparatus for excitation, e.g. pumping using optical pumping by coherent light the pumped medium being a fibre
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B37/00—Manufacture or treatment of flakes, fibres, or filaments from softened glass, minerals, or slags
    • C03B37/01—Manufacture of glass fibres or filaments
    • C03B37/012—Manufacture of preforms for drawing fibres or filaments
    • C03B37/01205—Manufacture of preforms for drawing fibres or filaments starting from tubes, rods, fibres or filaments
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
    • H01S3/05—Construction or shape of optical resonators; Accommodation of active medium therein; Shape of active medium
    • H01S3/06—Construction or shape of active medium
    • H01S3/063—Waveguide lasers, i.e. whereby the dimensions of the waveguide are of the order of the light wavelength
    • H01S3/067—Fibre lasers
    • H01S3/06708—Constructional details of the fibre, e.g. compositions, cross-section, shape or tapering
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B2201/00—Type of glass produced
    • C03B2201/06—Doped silica-based glasses
    • C03B2201/30—Doped silica-based glasses doped with metals, e.g. Ga, Sn, Sb, Pb or Bi
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B2201/00—Type of glass produced
    • C03B2201/06—Doped silica-based glasses
    • C03B2201/30—Doped silica-based glasses doped with metals, e.g. Ga, Sn, Sb, Pb or Bi
    • C03B2201/50—Doped silica-based glasses doped with metals, e.g. Ga, Sn, Sb, Pb or Bi doped with alkali metals
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B2203/00—Fibre product details, e.g. structure, shape
    • C03B2203/10—Internal structure or shape details
    • C03B2203/12—Non-circular or non-elliptical cross-section, e.g. planar core
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24—Coupling light guides
    • G02B6/42—Coupling light guides with opto-electronic elements
    • G02B6/4201—Packages, e.g. shape, construction, internal or external details
    • G02B6/4204—Packages, e.g. shape, construction, internal or external details the coupling comprising intermediate optical elements, e.g. lenses, holograms
    • G02B6/4206—Optical features
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
    • H01S3/05—Construction or shape of optical resonators; Accommodation of active medium therein; Shape of active medium
    • H01S3/06—Construction or shape of active medium
    • H01S3/063—Waveguide lasers, i.e. whereby the dimensions of the waveguide are of the order of the light wavelength
    • H01S3/067—Fibre lasers
    • H01S3/06708—Constructional details of the fibre, e.g. compositions, cross-section, shape or tapering
    • H01S3/06729—Peculiar transverse fibre profile
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
    • H01S3/05—Construction or shape of optical resonators; Accommodation of active medium therein; Shape of active medium
    • H01S3/06—Construction or shape of active medium
    • H01S3/063—Waveguide lasers, i.e. whereby the dimensions of the waveguide are of the order of the light wavelength
    • H01S3/067—Fibre lasers
    • H01S3/06708—Constructional details of the fibre, e.g. compositions, cross-section, shape or tapering
    • H01S3/06745—Tapering of the fibre, core or active region
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
    • H01S3/05—Construction or shape of optical resonators; Accommodation of active medium therein; Shape of active medium
    • H01S3/08—Construction or shape of optical resonators or components thereof
    • H01S3/08018—Mode suppression
    • H01S3/0804—Transverse or lateral modes
    • H01S3/08045—Single-mode emission
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
    • H01S3/09—Processes or apparatus for excitation, e.g. pumping
    • H01S3/091—Processes or apparatus for excitation, e.g. pumping using optical pumping
    • H01S3/094—Processes or apparatus for excitation, e.g. pumping using optical pumping by coherent light
    • H01S3/094003—Processes or apparatus for excitation, e.g. pumping using optical pumping by coherent light the pumped medium being a fibre
    • H01S3/094007—Cladding pumping, i.e. pump light propagating in a clad surrounding the active core
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
    • H01S3/09—Processes or apparatus for excitation, e.g. pumping
    • H01S3/091—Processes or apparatus for excitation, e.g. pumping using optical pumping
    • H01S3/094—Processes or apparatus for excitation, e.g. pumping using optical pumping by coherent light
    • H01S3/094003—Processes or apparatus for excitation, e.g. pumping using optical pumping by coherent light the pumped medium being a fibre
    • H01S3/094019—Side pumped fibre, whereby pump light is coupled laterally into the fibre via an optical component like a prism, or a grating, or via V-groove coupling
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
    • H01S3/09—Processes or apparatus for excitation, e.g. pumping
    • H01S3/091—Processes or apparatus for excitation, e.g. pumping using optical pumping
    • H01S3/094—Processes or apparatus for excitation, e.g. pumping using optical pumping by coherent light
    • H01S3/094069—Multi-mode pumping

Definitions

  • the invention relates to fibre laser systems, and more particularly to fibre laser systems that have cores and claddings that are configured for high power applications.
  • Fibre lasers in fibre form provide low-cost, easily-produced devices at a number of wavelengths suitable for applications in telecommunications, sensing, medicine and spectroscopy.
  • Fibre lasers offer a number of advantages over solid-state crystal lasers and bulk glass lasers.
  • the waveguide nature of optical fibres means that very high power densities can be achieved in the core of a single-mode fibre at low power levels.
  • the threshold powers of fibre lasers are therefore very low in comparison to bulk glass and crystal lasers.
  • the high surface area to volume ratio of fibre lasers makes for easy heat dissipation that permits continuous wave (CW) operation of even three level systems such as erbium-doped fibres.
  • the fibre lasers are broadly tunable and can provide high-power Q-switched output, modelocked pulses and narrow-linewidth operation using a number of now well established techniques. See, for instance, P. Urquart, "Review of rare-earth doped fire lasers and amplifiers", IEEE Proc. J. , Vol. 135, pages 385 through 406.
  • Fibre lasers are normally considered to be low-power devices and not competitive with diode pumped Nd:YAG lasers.
  • fibre lasers of current design are low-power devices that are not competitive with diode-pumped NdrYAG lasers.
  • the fibre laser according to the invention employs special- glass technology, a novel inner-cladding fibre geometry and a number of aspects of fibre technology and micro-optics for end- fibre coupling and side coupling of the pump light from diode- arrays.
  • Figure l Structure of the doubly-clad rare earth fibre for cladding pumping according to the invention.
  • FIGS. 1 through 2c Three possible optical systems for diode-to-fibre coupling according to the invention.
  • FIGS 3a through 3c Fibre circuitry for scaling to high powers in the end pumping scheme according to the invention.
  • FIGS. 4a and 4b Techniques for side injection into the active cladding pumping fibre according to the invention.
  • the pump light is launched into a large, undoped, multimode fibre, core that readily accepts light from extended sources, whereupon it is absorbed active rare-earth ions located in an inner single-mode core within the multimode waveguide. Feedback of the fluorescence generated in and capture by the single-mode core results in lasing action with a guaranteed single-mode output.
  • an SDL three Watt diode array has emitting dimensions of 1 ⁇ m by 500 ⁇ m and the laser beam has divergence angles of 40 degrees and 10 degrees (FWHM) in the respective planes parallel and perpendicular to the diode junction.
  • FWHM FWHM
  • the full width at zero intensity is approximately 60 degrees.
  • the intensity is almost uniform across the beam, so that the full width at zero intensity is again 10 degrees.
  • the image of the light source at the endface of the fibre should have a spacial extent less than the dimensions of the fibre core, and in addition, the divergence at the beam waist must not be significantly greater than the acceptance angle of the fibre.
  • the beam divergence in the fast diverging plane dictates that for 1:1 imaging in this plane, the fibre should have a numerical aperture (NA) in excess of 0.5 for 100 percent collection efficiency while the large array width dictates that the field should be compressed by a factor of approximately four to couple to a fibre of normal diameter (approximately 125 ⁇ m) .
  • NA numerical aperture
  • the field compression in this plane result in an increase in the beam divergence by the same factor by which the field is compressed.
  • An ideal fibre for cladding pumping requires that ratio of inner cladding area to inner core area is minimized so as to keep the cavity losses to a minimum while at the same time enabling efficient coupling from the diode to the fibre.
  • the ideal fibre is a rectangular structure with high NA having a major axis reduced with respect to the width of the diode array by the ratio, sin "1 (NA)/(0) where ⁇ is the slower of the diode beam divergences and a minor axis large enough to contain a single mode core of conventional diameter, typically 8 ⁇ m.
  • the fibre employed in the preferred embodiment of the invention utilizes compound glass technology for the first time in a cladding-pumping scheme.
  • the fibre is fabricated from Schott flint glass, (F2 and F7) and light flint glass (LF8) The approximate compositions of these glasses are given in Table 1.
  • FIG. 1 Details of the fabrication of a neodymium doped fibre are shown schematically in Figure 1, wherein a cross-section of a fibre 2 according to the invention is illustrated.
  • the fibre 2 was fabricated using a modified rod-in-tube technique.
  • the fibre comprises a circular outer cladding 4, a rectangular inner cladding 6 and a neodymium-doped circular core 8 in the centre.
  • This design gives the most efficient pump absorption for a given dopant concentration and area ratio. See, for instance, H. Po ⁇ t al.. above. Schott flint glasses LF8, F2 and F7 were used for the outer cladding 4, the inner cladding 6 and the core 8, respectively.
  • the core 8 was prepared from a mixture of three weight- percent Nd 2 0 3 in F7 glass melted in a platinum crucible at approximately 1200 degrees Celsius.
  • a cane of core glass of approximately three to five mm in diameter is drilled out of the prepared F7 glass and inserted into a "tight fit" tube of F2 glass having an outer diameter of approximately 10 mm.
  • a tube of F7 glass with an inner diameter corresponding to that of the F2/F7 core rod was milled down on opposite sides to form the rectangular cladding.
  • the outer cladding of LF8 glass was made out of two D-shaped section and a circular outer tube. In all, six separate pieces made up the preform. The pieces were milled on an ultrasonic rotary machine equipped with diamond impregnated tools. All pieces were acid etched with HF/H 2 SO 4 prior to assembly. This ensures low losses at the different interfaces.
  • the fibre was drawn conventionally in a low temperature furnace at around 600 degrees Celsius.
  • the dimensions of the inner cladding 6 are typically 120 ⁇ m by 20 ⁇ m, the inner core 8 diameter is typically 5.5 ⁇ m and the outer cladding 4 diameter is typically 150 ⁇ m.
  • the NA between the outer cladding 4 and inner cladding 6 (LF8/F2) is 0.42 and the Nd-doped F7 core 8 NA is 0.13.
  • the inner cladding 6 is designed to match as closely as possible to the large diffraction angle of the diode, and whilst minimizing the area of the rectangular guide, thus optimizing the pump absorption in the core and the laser threshold.
  • the background loss at the lasing wavelength of 1057 nm is 0.9 dB/m (the intrinsic loss of the undoped F7 core 8 clad with F2) , and the inner cladding 6 attenuation at the pump wavelength of 808 nm is 0.3 dB/m. These values are comparable to the losses in bulk glasses, indicating that the fabrication process does not introduce significant additional loss.
  • the absorption of pump light propagating in the inner cladding by the doped single -mode core 8 is approximately 15 dB/m.
  • the fibre 2 described above is considered superior to earlier cladding-pump designs because a high numerical aperture is achieved in all-glass design.
  • Previous cladding-pumping schemes have either employed soft polymer outer claddings, such as described by H. Po et al.. above, or compromised on NA, such as described by E.Snitzer et al. and V.P. Gapontsev et al.. above.
  • the soft polymer coating/outer cladding while enabling NA's of up to 0.4 in silica fibres, introduces problems in cleaving fibers of irregular cross-section, since the coating must be removed prior to cleaving.
  • Such fibres are those of rectangular design, and in direct coating of the endface with the necessary dichroic reflectors that allow high pump transmission and high reflection of the intracavity laser light, since the presence of the polymer often causes contamination of the coating apparatus.
  • the lower inner cladding NA of silica based all-glass fibres limit the launch efficiency from laser diodes.
  • An additional advantage of the choice of glasses described above is that they give higher radiative cross-sections and the possibility for higher doping levels without concentration quenching.
  • These fibres offer higher gain than similarly doped silica fibres, thus enabling the construction of devices such as Q-switched fibre lasers that require high gain for efficient operation.
  • the first method uses two crossed cylindrical lenses 10 for collimation of pumping radiation from a diode array 12, and a single spherical lens 14 for refocussing onto the fibre 2.
  • the ratio of the focal lengths of the two cylindrical lenses 10 is equal to the required field compression ratio.
  • the cylindrical lenses 10 may comprise special D-shaped fibres, and the spherical lens 14 may be a fibre coupling sphere or ball lens. These are miniature spherical lenses with focal lengths between several hundred microns and a few millimetres, when these spheres are glued to a fibre end, they can act as collimators, for example, in expanded beam connectors. Miniaturized coupling systems using shorter focal lengths enable compact coupling systems, and also reduce aberrations.
  • the second method shown in Figure 2(b), is similar to the one described above in connection with Figure 2(a), but it uses and anamorphic prism pair 16 to expand the collimated beam in the transverse plane, and two spherical lenses 18 for collimation and focusing.
  • the light form the diode array 12 excites low order modes in the transverse plane, since the divergence angle in this plane is significantly less than the acceptance angle of the fibre 2.
  • the light remains guided so long as the compression ratio does not exceed the limit imposed by the NA of the fibre.
  • a special D-fibre can be fabricated for the purpose, as can a fibre 2 with a cladding glass that can be preferentially etched, this technique can be extended by concatenation as shown in Figure 3(a) to combine the pump from multiple diode arrays or from the subarrays 22 of diode bars.
  • cladding-pumped fibre-lasers can be scaled to high powers is by injecting pump light transversely at multiple entry points in the fibre.
  • the entry points must be separated by sufficient length of cladding-pumping fibre that a high proportion of the pump light injected by the previous pump source has been absorbed to ensure that significant residual light is not coupled out of the fibre at the entry point.
  • the technique can be an efficient scaling technique for four-level lasers, provided that the number of entry points is not too great, and that the fibre loss is low. Eventually, a limit is reached where the proportion of extra gain available due to further pump light is offset by the additional cavity loss in the extra length of fibre. In a three-level system, the additional cavity length increases the threshold power proportionally, making the scheme less attractive.
  • the technique for side injection is illustrated schematically in Figure 4.
  • the cladding pumping fibre 2 is polished in the plane orthogonal to the long axis so that the inner cladding 6 is exposed on one side over a short length.
  • This plane is chosen because the fibre 2 has "spare numerical aperture" over the diode array 12 in the long axis. Attempting to side inject in the other plane results in high radiation loss.
  • the optical axis of the light delivery system from the diode array 12 is slightly tilted with respect to the axis of the receiving fibre.
  • the delivery system can be by any of the means described above.
  • the actual coupling mechanism may be by focusing with a spherical lens 26 through an index-matched glass block 28 or via a fibre 2 polished at a shallow angle.
  • standard multimode-couplers may be used for injection. These are standard passive fibre optic components manufactured either by fusing and tapering two multimode fibres until overlap of the modal fields induces coupling, or by polishing each fibre in turn until the cores are exposed, and placing them sid by side again to induce coupling.
  • the maximum power coupling to the second prot is fifty percent, because although each individual mode may be fully coupled, the coupling length for each mode is different. Averaging the coupled power over all the modes yields a 50:50 split at the output. For purposes of side injecting pump light to cladding-pumping fibres, this technique, though feasible, is less attractive than the means described above, since the number of entry points increases as a result of the fifty percent coupling restriction that can be coupled at each section.
  • the output characteristics of the fibre laser according to the invention, pumped by a three Watt SDL GaAlAs multi-stripe diode array are shown by line 30, representing output power as a function of diode pumping power.
  • the fibre laser With the pump diode operating at full power, the fibre laser achieves 1.07 Watt output power at a peak wavelength of 1.057 ⁇ m.
  • the overall efficiency with respect to diode power is around fifty percent, which is close to the maximum attainable.
  • Er 3+ /Yb 3+ optical fibre amplifier An amplifier gain of 45 dB and output signal powers in excess of +20 dBm have been demonstrated. the amplifier characteristics are illustrated in Figure 6, wherein line 32 represents gain as a function of input signal power, and line 34 represents output power as a function of input power.

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Electromagnetism (AREA)
  • Chemical & Material Sciences (AREA)
  • Optics & Photonics (AREA)
  • Plasma & Fusion (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Lasers (AREA)

Abstract

Fibre de verre composite fabriquée à partir de verres à base de silicate de plomb comprenant un revêtement externe, un revêtement interne présentant en coupe un profil optimalisé pour recevoir un rayonnement de pompage multimode, et un noyau central monomode à l'intérieur dudit revêtement interne, qui est dopé avec un matériau produisant un effet laser afin de maximaliser le transfert du rayonnement de pompage multimode dans le noyau dopé monomode.
PCT/US1993/000887 1992-01-31 1993-02-01 Fibre a laser pompee par une diode laser, pouvant etre configuree pour des applications haute puissance WO1993015536A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US83034392A 1992-01-31 1992-01-31
US07/830,343 1992-01-31

Publications (1)

Publication Number Publication Date
WO1993015536A1 true WO1993015536A1 (fr) 1993-08-05

Family

ID=25256803

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1993/000887 WO1993015536A1 (fr) 1992-01-31 1993-02-01 Fibre a laser pompee par une diode laser, pouvant etre configuree pour des applications haute puissance

Country Status (1)

Country Link
WO (1) WO1993015536A1 (fr)

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996004700A1 (fr) * 1994-07-29 1996-02-15 Polaroid Corporation Structure de fibre optique conçue pour une utilisation efficace de la puissance de la pompe
DE4447356A1 (de) * 1994-12-20 1996-06-27 Max Born Inst Fuer Nichtlinear Anordnung zur Erzeugung von Laserstrahlung
EP0776074A3 (fr) * 1995-11-22 1997-10-08 At & T Corp Structure de fibre à pompage de la gaine
US6181466B1 (en) 1997-08-23 2001-01-30 Pirelle Cavi E Sistemi S.P.A. Unequal couplers for multimode pumping optical amplifiers
EP1090887A3 (fr) * 1999-10-08 2001-05-02 Shin-Etsu Chemical Co., Ltd. Fibre optique, préforme pour fibre optique et procédé de fabriquer la préforme avec une première gaine déformée
WO2001067559A3 (fr) * 2000-03-03 2002-02-14 Hrl Lab Llc Procede et appareil de pompage de fibres optiques
WO2002013338A3 (fr) * 2000-08-03 2002-08-29 Hrl Lab Llc Procede et appareil se rapportant a une fibre optique a pompage
US6477307B1 (en) 2000-10-23 2002-11-05 Nufern Cladding-pumped optical fiber and methods for fabricating
WO2002050964A3 (fr) * 2000-12-21 2003-09-04 Univ Southampton Laser a fibre
US6625363B2 (en) 2001-06-06 2003-09-23 Nufern Cladding-pumped optical fiber
EP1246321A3 (fr) * 2001-03-14 2003-11-19 Corning Incorporated Laser/amplificatuer à fibre de trois niveaux à pompage par le gainage
US6687445B2 (en) 2001-06-25 2004-02-03 Nufern Double-clad optical fiber for lasers and amplifiers
WO2003096491A3 (fr) * 2002-05-08 2004-08-05 Elop Electrooptics Ind Ltd Systeme et procede d'introduction de rayonnement de pompe dans un laser a fibre haute puissance et amplificateur
WO2004070897A3 (fr) * 2003-02-07 2004-10-07 Southampton Photonics Ltd Appareil permettant d'obtenir un rayonnement optique
US6950586B2 (en) 2001-03-02 2005-09-27 Ocg Technology Licensing, Llc Fiber for enhanced energy absorption
US7116887B2 (en) 2002-03-19 2006-10-03 Nufern Optical fiber
US7492508B2 (en) 1997-03-21 2009-02-17 Aisin Seiki Co., Ltd. Microchip—Yb fiber hybrid optical amplifier for micro-machining and marking
US9153929B2 (en) 1998-11-25 2015-10-06 Imra America, Inc. Mode-locked multi-mode fiber laser pulse source
EP1849029B1 (fr) 2005-02-04 2018-06-20 Centre National de la Recherche Scientifique (CNRS) Fibre optique composite pour laser à confinement d'ondes de pompe

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3808549A (en) * 1972-03-30 1974-04-30 Corning Glass Works Optical waveguide light source
US4829529A (en) * 1987-06-15 1989-05-09 Spectra-Physics, Inc. Laser diode pumped fiber lasers with pump cavity
EP0320990A2 (fr) * 1987-12-17 1989-06-21 Polaroid Corporation Lasers et amplificateurs à fibre optique

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3808549A (en) * 1972-03-30 1974-04-30 Corning Glass Works Optical waveguide light source
US4829529A (en) * 1987-06-15 1989-05-09 Spectra-Physics, Inc. Laser diode pumped fiber lasers with pump cavity
EP0320990A2 (fr) * 1987-12-17 1989-06-21 Polaroid Corporation Lasers et amplificateurs à fibre optique

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
MATERIAL RESEARCH SOCIETY SYMPOSIUM PROCEEDINGS vol. 172, 1989, PITTSBURG, PA, US pages 321 - 327 E.R. TAYLOR ET AL. 'Application-specific optical fibres manufactured from multicomponent glasses' *

Cited By (30)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996004700A1 (fr) * 1994-07-29 1996-02-15 Polaroid Corporation Structure de fibre optique conçue pour une utilisation efficace de la puissance de la pompe
JP3039993B2 (ja) 1994-07-29 2000-05-08 エスディーエル， インコーポレイテッド ポンプパワーを有効に使用するための光ファイバ構造
DE4447356A1 (de) * 1994-12-20 1996-06-27 Max Born Inst Fuer Nichtlinear Anordnung zur Erzeugung von Laserstrahlung
EP0776074A3 (fr) * 1995-11-22 1997-10-08 At & T Corp Structure de fibre à pompage de la gaine
US7492508B2 (en) 1997-03-21 2009-02-17 Aisin Seiki Co., Ltd. Microchip—Yb fiber hybrid optical amplifier for micro-machining and marking
US6181466B1 (en) 1997-08-23 2001-01-30 Pirelle Cavi E Sistemi S.P.A. Unequal couplers for multimode pumping optical amplifiers
US9153929B2 (en) 1998-11-25 2015-10-06 Imra America, Inc. Mode-locked multi-mode fiber laser pulse source
US9570880B2 (en) 1998-11-25 2017-02-14 Imra America, Inc. Multi-mode fiber amplifier
US9595802B2 (en) 1998-11-25 2017-03-14 Imra America, Inc. Multi-mode fiber amplifier
EP1090887A3 (fr) * 1999-10-08 2001-05-02 Shin-Etsu Chemical Co., Ltd. Fibre optique, préforme pour fibre optique et procédé de fabriquer la préforme avec une première gaine déformée
KR100718312B1 (ko) * 1999-10-08 2007-05-15 신에쓰 가가꾸 고교 가부시끼가이샤 변형된 제 1 크래드를 갖는 광섬유용 모재의 제조방법,광섬유용 모재 및 광섬유
US6681074B1 (en) 1999-10-08 2004-01-20 Shin-Etsu Chemical Co., Ltd. Method for producing base material for optical fiber having deformed first clad, base material for optical fiber and optical fiber
WO2001067559A3 (fr) * 2000-03-03 2002-02-14 Hrl Lab Llc Procede et appareil de pompage de fibres optiques
US6603905B1 (en) 2000-03-03 2003-08-05 Hrl Laboratories, Llc Launch port for pumping fiber lasers and amplifiers
WO2002013338A3 (fr) * 2000-08-03 2002-08-29 Hrl Lab Llc Procede et appareil se rapportant a une fibre optique a pompage
US6779364B2 (en) 2000-10-23 2004-08-24 Nufern Cladding-pumped optical fiber and methods for fabricating
US6477307B1 (en) 2000-10-23 2002-11-05 Nufern Cladding-pumped optical fiber and methods for fabricating
US7003206B2 (en) 2000-10-23 2006-02-21 Nufern Cladding-pumped optical fiber and methods for fabricating
WO2002050964A3 (fr) * 2000-12-21 2003-09-04 Univ Southampton Laser a fibre
US6950586B2 (en) 2001-03-02 2005-09-27 Ocg Technology Licensing, Llc Fiber for enhanced energy absorption
US6836607B2 (en) 2001-03-14 2004-12-28 Corning Incorporated Cladding-pumped 3-level fiber laser/amplifier
EP1246321A3 (fr) * 2001-03-14 2003-11-19 Corning Incorporated Laser/amplificatuer à fibre de trois niveaux à pompage par le gainage
US6625363B2 (en) 2001-06-06 2003-09-23 Nufern Cladding-pumped optical fiber
US6687445B2 (en) 2001-06-25 2004-02-03 Nufern Double-clad optical fiber for lasers and amplifiers
US7116887B2 (en) 2002-03-19 2006-10-03 Nufern Optical fiber
WO2003096491A3 (fr) * 2002-05-08 2004-08-05 Elop Electrooptics Ind Ltd Systeme et procede d'introduction de rayonnement de pompe dans un laser a fibre haute puissance et amplificateur
US7321710B2 (en) 2003-02-07 2008-01-22 William Andrew Clarkson Apparatus for providing optical radiation
EP2028734A1 (fr) 2003-02-07 2009-02-25 SPI Lasers UK Limited Appareil pour fournir un rayonnement optique
WO2004070897A3 (fr) * 2003-02-07 2004-10-07 Southampton Photonics Ltd Appareil permettant d'obtenir un rayonnement optique
EP1849029B1 (fr) 2005-02-04 2018-06-20 Centre National de la Recherche Scientifique (CNRS) Fibre optique composite pour laser à confinement d'ondes de pompe

Similar Documents

Publication Publication Date Title
CA1324517C (fr) Lasers et amplificateurs a fibres optiques
US4967416A (en) Thulium-doped fluorozirconate fiber laser pumped by a diode laser source
Nilsson et al. High-power wavelength-tunable cladding-pumped rare-earth-doped silica fiber lasers
WO1993015536A1 (fr) Fibre a laser pompee par une diode laser, pouvant etre configuree pour des applications haute puissance
US6324326B1 (en) Tapered fiber laser
US5530709A (en) Double-clad upconversion fiber laser
EP1636883B1 (fr) Procede et dispositif de pompage lateral par emetteurs multiples pour lasers a fibres optiques
US5084880A (en) Erbium-doped fluorozirconate fiber laser pumped by a diode laser source
US6836607B2 (en) Cladding-pumped 3-level fiber laser/amplifier
EP1147579B1 (fr) Pompe guide d'onde optique a laser solide/semi-conducteur et procede associe
US20040076197A1 (en) Fibre laser
US20050207455A1 (en) Method and apparatus for efficient coupling of pump light into fiber amplifiers
US20050100073A1 (en) Cladding-pumped quasi 3-level fiber laser/amplifier
US6104733A (en) Multi-stage optical fiber amplifier having high conversion efficiency
US6427491B1 (en) Method for making fibers having cores with non-circular cross-sections
Even et al. High-power double-clad fiber lasers: a review
US20040109225A1 (en) Multi-mode pumped ase source using phosphate and tellurite glasses
CN112713490B (zh) 一种中红外波段连续全光纤振荡器
US6931032B2 (en) Method of transferring energy in an optical fiber laser structure using energy migration
Supe et al. Recent developments in cladding-pumped doped fiber amplifiers for telecommunications systems
Headley III et al. Tapered fiber bundles for combining laser pumps
US6650664B1 (en) Cladding-pumped fiber with helical rare-earth-doped core for fiber lasers and amplifiers
US6360040B1 (en) Method for coupling of laser beams into waveguides
JPH07211980A (ja) 光ファイバ増幅器
Bhagavatula et al. Progress in high-power fiber lasers

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): CA JP

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): AT BE CH DE DK ES FR GB GR IE IT LU MC NL PT SE

DFPE Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101)
122 Ep: pct application non-entry in european phase
NENP Non-entry into the national phase

Ref country code: CA