CN211508175U - Double-pulse solid laser coupled by polarization state - Google Patents
Double-pulse solid laser coupled by polarization state Download PDFInfo
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- CN211508175U CN211508175U CN202020555821.2U CN202020555821U CN211508175U CN 211508175 U CN211508175 U CN 211508175U CN 202020555821 U CN202020555821 U CN 202020555821U CN 211508175 U CN211508175 U CN 211508175U
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- 230000010287 polarization Effects 0.000 title claims abstract description 138
- 239000007787 solid Substances 0.000 title claims abstract description 18
- 230000008878 coupling Effects 0.000 claims abstract description 28
- 238000010168 coupling process Methods 0.000 claims abstract description 28
- 238000005859 coupling reaction Methods 0.000 claims abstract description 28
- 239000000126 substance Substances 0.000 claims description 32
- 239000013078 crystal Substances 0.000 claims description 31
- 230000003287 optical effect Effects 0.000 claims description 6
- 230000005540 biological transmission Effects 0.000 claims description 3
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- 238000002474 experimental method Methods 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 6
- 230000010355 oscillation Effects 0.000 description 5
- 238000005034 decoration Methods 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 229910052724 xenon Inorganic materials 0.000 description 2
- FHNFHKCVQCLJFQ-UHFFFAOYSA-N xenon atom Chemical compound [Xe] FHNFHKCVQCLJFQ-UHFFFAOYSA-N 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
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Abstract
The utility model provides a double-pulse solid laser coupled by polarization state, which comprises a first pulse laser output unit (A), a second pulse laser output unit (B), a polarization coupling beam combination unit (C) and an output mirror (5); the polarization coupling beam combination unit (C) comprises a first polarization component (4) and a second polarization component (6). Has the advantages that: two paths of pulse lasers are generated in the same solid laser resonant cavity, and are subjected to polarization 'intracavity beam combination' through a polarization coupling beam combination unit, and an output mirror is shared, so that the design of a compact double-pulse resonant cavity in a limited volume is realized. Experiments and application products prove that the laser can completely reduce the volume of the laser, improve the contact ratio of double-pulse laser spots and have good effect on the application of double-pulse laser.
Description
Technical Field
The utility model belongs to the technical field of laser, concretely relates to double pulse solid laser through polarization state coupling.
Background
At present, two separated and independent resonant cavities are mostly adopted for the double-pulse solid laser, and the double-pulse laser is formed by polarization beam combination outside the cavity.
SUMMERY OF THE UTILITY MODEL
The defect to prior art existence, the utility model provides a through the dipulse solid laser of polarization state coupling, can effectively solve above-mentioned problem.
The utility model adopts the technical scheme as follows:
the utility model provides a double-pulse solid laser coupled by polarization state, which comprises a first pulse laser output unit (A), a second pulse laser output unit (B), a polarization coupling beam combination unit (C) and an output mirror (5);
the polarization coupling beam combination unit (C) comprises a first polarization component (4) and a second polarization component (6);
the first pulse laser output unit (A) comprises a first total reflection rear mirror (1), a first polarization starting device (2) and a first working substance (3); the first total reflection rear mirror (1), the first polarizing component (2), the first working substance (3) and the first polarizing component (4) are arranged on the same optical axis in sequence; among the laser generated by the first working substance (3), a first polarization state laser is obtained after passing through a first polarizing component (2), and is incident to the first total reflection rear mirror (1), reflected by the first total reflection rear mirror (1), sequentially passes through the first polarizing component (2) and the first working substance (3), and then is incident to the first polarizing component (4); the output mirror (5) is arranged on a transmission light path of the first polarization component (4);
the second pulse laser output unit (B) comprises a second total reflection rear mirror (9), a second polarizing component (8) and a second working substance (7); the second total reflection rear mirror (9), the second polarizing component (8) and the second working substance (7) are arranged on the same optical axis in sequence; in the laser generated by the second working substance (7), a second polarization state laser is obtained after passing through the second polarization component (8), and the polarization direction of the second polarization state laser caused by the second polarization component (8) is vertical to the polarization direction of the first polarization state laser caused by the first polarization component (2); after being incident to the second total reflection rear mirror (9), the second polarization state laser is reflected by the second total reflection rear mirror (9), passes through the second polarizing component (8) and the second working substance (7) in sequence, and then is incident to the second polarizing component (6); the second polarization component (6) enables the reflected light of the second polarization state laser to enter the first polarization component (4), and the first polarization component (4) enables the reflected light of the second polarization state laser to enter the output mirror (5).
Preferably, the first total reflection rear mirror (1) and the second total reflection rear mirror (9) are arranged separately; or the first total reflection rear mirror (1) and the second total reflection rear mirror (9) are integrated into the same total reflection rear mirror; the integrated total reflection rear mirror is called a third total reflection rear mirror (D); namely: the first pulse laser output unit (A) and the second pulse laser output unit (B) share the same third total reflection rear mirror (D).
Preferably, the first pulsed laser output unit (a) further includes a first Q-switched crystal (10); the first Q-switching crystal (10) is coaxially arranged between the first polarization-start component (2) and the first total reflection rear mirror (1); the second pulse laser output unit (B) further comprises a second Q-switching crystal (11); the second Q-switched crystal (11) is coaxially arranged between the second polarizing component (8) and the second total reflection rear mirror (9).
Preferably, the first Q-switching crystal (10) and the second Q-switching crystal (11) are active Q-switching crystals or passive Q-switching crystals.
Preferably, the first polarization component (4) and the second polarization component (6) are the same and are both polarizing prisms, brewster angle polarizers or 45-degree polarizers.
The utility model provides a pair of dipulse solid laser through polarization state coupling has following advantage:
two paths of pulse lasers are generated in the same solid laser resonant cavity, and are subjected to polarization 'intracavity beam combination' through a polarization coupling beam combination unit, and an output mirror is shared, so that the design of a compact double-pulse resonant cavity in a limited volume is realized. Experiments and application products prove that the laser can completely reduce the volume of the laser, improve the contact ratio of double-pulse laser spots and have good effect on the application of double-pulse laser.
Drawings
Fig. 1 is a schematic structural diagram of a dual-pulse solid-state laser coupled by polarization state according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a dual-pulse solid-state laser coupled by polarization state according to an embodiment of the present invention;
fig. 3 is a schematic structural principle diagram of a dual-pulse solid-state laser coupled through a polarization state according to a third embodiment of the present invention;
fig. 4 is a schematic structural diagram of a dual-pulse solid-state laser coupled by polarization state according to a third embodiment of the present invention;
fig. 5 is a schematic structural diagram of a dual-pulse solid-state laser coupled by polarization state according to a fourth embodiment of the present invention;
fig. 6 is a schematic structural diagram of a dual-pulse solid-state laser coupled through a polarization state according to a fifth embodiment of the present invention.
Detailed Description
In order to make the technical problem, technical solution and advantageous effects solved by the present invention more clearly understood, the following description is given in conjunction with the accompanying drawings and embodiments to further explain the present invention in detail. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.
The utility model provides a dipulse solid laser through polarization state coupling mainly is applied to the dipulse and uses, for example dipulse PIV laser instrument (ion formation of image is tested the speed) and dipulse LIBS etc. use (laser induction punctures the spectrum appearance). Two paths of pulse lasers are generated in the same solid laser resonant cavity, and are subjected to polarization 'intracavity beam combination' through a polarization coupling beam combination unit, and an output mirror is shared, so that the design of a compact double-pulse resonant cavity in a limited volume is realized. Because two paths of pulse laser are generated in the same resonant cavity and share the same output mirror, the overlapping ratio of the light spots of the double beams is improved.
Referring to fig. 1, a dual-pulse solid-state laser coupled by polarization state includes a first pulse laser output unit a, a second pulse laser output unit B, a polarization-coupled beam combining unit C, and an output mirror 5; the first pulse laser output unit A, the second pulse laser output unit B, the polarization coupling beam combination unit C and the output mirror 5 are arranged in the same solid laser resonant cavity.
The polarization coupling beam combination unit C comprises a first polarization component 4 and a second polarization component 6;
the first pulse laser output unit A comprises a first total reflection rear mirror 1, a first polarization starting device 2 and a first working substance 3; a first total reflection rear mirror 1, a first polarizing component 2, a first working substance 3 and a first polarizing component 4 are arranged on the same optical axis in sequence; among the laser generated by the first working substance 3, the first polarization state laser is obtained after passing through the first polarizing component 2, and the first polarization state laser is incident to the first total reflection rear mirror 1, reflected by the first total reflection rear mirror 1, sequentially passes through the first polarizing component 2 and the first working substance 3, and then is incident to the first polarizing component 4; an output mirror 5 is arranged on the transmission light path of the first polarization component 4;
the second pulse laser output unit B comprises a second total reflection rear mirror 9, a second polarizing component 8 and a second working substance 7; a second total reflection rear mirror 9, a second polarizing component 8 and a second working substance 7 are arranged on the same optical axis in sequence; in the laser generated by the second working substance 7, the second polarization state laser is obtained after passing through the second polarization component 8, and the polarization direction of the second polarization state laser caused by the second polarization component 8 is vertical to the polarization direction of the first polarization state laser caused by the first polarization component 2; after being incident to the second total reflection rear mirror 9, the second polarization state laser is reflected by the second total reflection rear mirror 9, passes through the second polarizing component 8 and the second working substance 7 in sequence, and then is incident to the second polarizing component 6; the reflected light of the second polarization state laser beam from the second polarization component 6 is incident on the first polarization component 4, and the reflected light of the second polarization state laser beam from the first polarization component 4 is incident on the output mirror 5.
In practical application, the following modes can be adopted for each device:
the first total reflection rear mirror 1 and the second total reflection rear mirror 9 form one end of a resonant cavity; the lens is plated with a reflective dielectric film (R > 99%) for the oscillating laser;
the first working substance 3 and the second working substance 7 are core devices for generating oscillation output, comprise a laser crystal and a flash lamp, and are formed by integrating a working substance (such as Nd: YAG), a light-gathering cavity and a xenon lamp, wherein the light-gathering cavity pumps the working substance by light energy released by discharge of the xenon lamp to realize upper-level population inversion and is used for providing energy required by a laser; specifically, laser crystal in the pumping cavity absorbs pumping light emitted by the flash lamp to generate laser radiation;
the first polarizing component 2 and the second polarizing component 8 are used for changing the polarization direction of the laser, and the polarization directions of the first polarizing component 2 and the second polarizing component 8 are vertical, for example, so that the first pulse laser output unit a outputs horizontal polarized light; the second pulse laser output unit B is caused to output vertically polarized light.
And an output mirror 5 forming the other end of the resonator for outputting laser light. One surface of the output mirror facing the resonant cavity is plated with a dielectric film for partially outputting the oscillation laser, and the other surface is plated with an anti-reflection dielectric film for the oscillation laser (T > 99%).
The working principle is as follows: the space between the first total reflection rear mirror 1 and the output mirror 5 forms an oscillation space of the laser light of the first polarization state. Specifically, laser generated by the first working substance 3 passes through the first polarization component 2 to obtain laser in a first polarization state, and then enters the first all-reflection back mirror 1, and after being reflected by the first all-reflection back mirror 1, the laser passes through the first polarization component 2 and the first working substance 3 to enter the first polarization component 4, and then enters the output mirror 5 after being transmitted by the first polarization component 4.
The space between the second total reflection rear mirror 9 and the output mirror 5 forms an oscillation space of the laser light of the second polarization state. Specifically, laser light generated by the second working substance 7 passes through the second polarizing element 8 to obtain laser light in a second polarization state, and then enters the second all-reflection rear mirror 9; after being reflected by a second total reflection rear mirror 9, the light passes through a second polarizing component 8 and a second working substance 7, is incident to a second polarizing component 6, and is reflected by the second polarizing component 6 and then is incident to a first polarizing component 4; and then reflected by the first polarization component 4 and then enters the output mirror 5.
Therefore, in the application, in the same solid laser resonant cavity, the first pulse laser output unit a and the second pulse laser output unit B respectively generate two paths of pulse lasers, and the two paths of pulse lasers are polarized and 'beam-combined in the cavity' through the polarization coupling beam-combining unit and share one output mirror.
Based on the design concept, for fully understanding the present application, four embodiments are introduced below:
the first embodiment is as follows:
in this embodiment, the first total reflection rear mirror 1 and the second total reflection rear mirror 9 are separately disposed, the first polarization component 4 and the second polarization component 6 are the same, and both brewster angle polarizers are used, so as to obtain the structure shown in fig. 1.
Therefore, the two first pulse laser output units A and the second pulse laser output units B which are vertical in polarization are combined through the polarization coupling beam combining component and output together through the output mirror 5 to form the double-pulse resonant cavity.
Example two:
in the present embodiment, referring to fig. 2, the first and second fully reflective rear mirrors 1 and 9 are integrated into the same fully reflective rear mirror; the integrated total reflection rear mirror is called a third total reflection rear mirror D; namely: the first pulse laser output unit A and the second pulse laser output unit B share the same third total reflection rear mirror D.
Example three:
referring to fig. 3 and 4, on the basis of the first embodiment, the first pulse laser output unit a further includes a first Q-switching crystal 10; the first Q-switched crystal 10 is coaxially arranged between the first polarization-start device 2 and the first total reflection rear mirror 1; the second pulse laser output unit B further includes a second Q-switched crystal 11; the second Q-switched crystal 11 is coaxially arranged between the second polarization component 8 and the second all-reflection rear mirror 9. The first Q-switched crystal 10 and the second Q-switched crystal 11 are active Q-switched crystals or passive Q-switched crystals.
By adding the Q-switching crystal, the Q-switching output of the linear polarization laser can be realized.
Example four:
referring to fig. 5, in this embodiment, the first polarization component 4 and the second polarization component 6 are the same and are both polarization prisms, so as to implement a polarization coupling beam combination function.
Example five:
referring to fig. 6, in this embodiment, the first polarization component 4 and the second polarization component 6 are the same and are both 45 ° polarizers, so as to implement the polarization coupling beam combining function.
To sum up, the utility model provides a pair of through double pulse solid laser of polarization state coupling needs key protection following content:
1) in the same laser resonant cavity, two paths of pulse lasers share the same output mirror through polarization 'intracavity beam combination' to form a double-pulse resonant cavity design.
2) The full-reflection rear mirror can be further covered and can be separately placed, and the full-reflection rear mirror can also be shared.
3) Further covering the first pulse laser output unit A and the second pulse laser output unit B, a Q-switched crystal (an active or passive Q-switched crystal) is added.
4) Further covering the polarization coupling beam combination component can be prism polarization (replacing a Brewster angle polaroid), so that the polarization coupling beam combination function is realized.
5) The polarization coupling beam combination component can be a 45-degree polaroid (replacing a Brewster angle polaroid) to realize the polarization coupling beam combination function.
Therefore, in the application, the total reflection rear mirror can be separately arranged and can also be shared. A Q-switching crystal (an active or passive Q-switching crystal) is added in the resonant cavity. The polarization coupling beam combination component in the resonant cavity can be a polarization prism, a 45-degree polaroid or a Brewster angle polaroid, and realizes the polarization coupling beam combination function.
The utility model provides a pair of dipulse solid laser through polarization state coupling has following advantage:
two paths of pulse lasers are generated in the same solid laser resonant cavity, and are subjected to polarization 'intracavity beam combination' through a polarization coupling beam combination unit, and an output mirror is shared, so that the design of a compact double-pulse resonant cavity in a limited volume is realized. Experiments and application products prove that the laser can completely reduce the volume of the laser, improve the contact ratio of double-pulse laser spots and have good effect on the application of double-pulse laser.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the principle of the present invention, and these improvements and decorations should also be viewed as the protection scope of the present invention.
Claims (5)
1. A double-pulse solid laser coupled through a polarization state is characterized by comprising a first pulse laser output unit (A), a second pulse laser output unit (B), a polarization coupling beam combining unit (C) and an output mirror (5);
the polarization coupling beam combination unit (C) comprises a first polarization component (4) and a second polarization component (6);
the first pulse laser output unit (A) comprises a first total reflection rear mirror (1), a first polarization starting device (2) and a first working substance (3); the first total reflection rear mirror (1), the first polarizing component (2), the first working substance (3) and the first polarizing component (4) are arranged on the same optical axis in sequence; among the laser generated by the first working substance (3), a first polarization state laser is obtained after passing through a first polarizing component (2), and is incident to the first total reflection rear mirror (1), reflected by the first total reflection rear mirror (1), sequentially passes through the first polarizing component (2) and the first working substance (3), and then is incident to the first polarizing component (4); the output mirror (5) is arranged on a transmission light path of the first polarization component (4);
the second pulse laser output unit (B) comprises a second total reflection rear mirror (9), a second polarizing component (8) and a second working substance (7); the second total reflection rear mirror (9), the second polarizing component (8) and the second working substance (7) are arranged on the same optical axis in sequence; in the laser generated by the second working substance (7), a second polarization state laser is obtained after passing through the second polarization component (8), and the polarization direction of the second polarization state laser caused by the second polarization component (8) is vertical to the polarization direction of the first polarization state laser caused by the first polarization component (2); after being incident to the second total reflection rear mirror (9), the second polarization state laser is reflected by the second total reflection rear mirror (9), passes through the second polarizing component (8) and the second working substance (7) in sequence, and then is incident to the second polarizing component (6); the second polarization component (6) enables the reflected light of the second polarization state laser to enter the first polarization component (4), and the first polarization component (4) enables the reflected light of the second polarization state laser to enter the output mirror (5).
2. Double-pulse solid-state laser coupled by polarization state according to claim 1, characterized in that the first and second fully reflective back mirrors (1, 9) are arranged separately; or the first total reflection rear mirror (1) and the second total reflection rear mirror (9) are integrated into the same total reflection rear mirror; the integrated total reflection rear mirror is called a third total reflection rear mirror (D); namely: the first pulse laser output unit (A) and the second pulse laser output unit (B) share the same third total reflection rear mirror (D).
3. The dual-pulse solid-state laser coupled by polarization state according to claim 1, wherein the first pulse laser output unit (a) further comprises a first Q-switched crystal (10); the first Q-switching crystal (10) is coaxially arranged between the first polarization-start component (2) and the first total reflection rear mirror (1); the second pulse laser output unit (B) further comprises a second Q-switching crystal (11); the second Q-switched crystal (11) is coaxially arranged between the second polarizing component (8) and the second total reflection rear mirror (9).
4. The dual-pulse solid-state laser coupled by polarization state according to claim 3, wherein the first Q-switched crystal (10) and the second Q-switched crystal (11) are active Q-switched crystals or passive Q-switched crystals.
5. A double-pulse solid-state laser coupled by polarization states according to claim 1, characterized in that the first polarization component (4) and the second polarization component (6) are identical and are both polarizing prisms, brewster angle polarizers or 45 ° polarizers.
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| CN202020555821.2U CN211508175U (en) | 2020-04-15 | 2020-04-15 | Double-pulse solid laser coupled by polarization state |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117013351A (en) * | 2023-08-02 | 2023-11-07 | 中国科学院大学 | Beam combining laser capable of coaxially outputting lasers with different characteristics |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117013351A (en) * | 2023-08-02 | 2023-11-07 | 中国科学院大学 | Beam combining laser capable of coaxially outputting lasers with different characteristics |
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