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WO2024142082A1 - Système et procédé pour une conception de cavité dbr ultra-compacte pour applications de technologie photonique - Google Patents

Système et procédé pour une conception de cavité dbr ultra-compacte pour applications de technologie photonique Download PDF

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Publication number
WO2024142082A1
WO2024142082A1 PCT/IN2023/051144 IN2023051144W WO2024142082A1 WO 2024142082 A1 WO2024142082 A1 WO 2024142082A1 IN 2023051144 W IN2023051144 W IN 2023051144W WO 2024142082 A1 WO2024142082 A1 WO 2024142082A1
Authority
WO
WIPO (PCT)
Prior art keywords
dbr
cavity
structures
signal
strip waveguide
Prior art date
Legal status (The legal status 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 status listed.)
Pending
Application number
PCT/IN2023/051144
Other languages
English (en)
Inventor
Pratyasha Priyadarshini
Arnab Goswami
Bijoy Krishna Das
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Indian Institute of Technology Madras
Original Assignee
Indian Institute of Technology Madras
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 Indian Institute of Technology Madras filed Critical Indian Institute of Technology Madras
Publication of WO2024142082A1 publication Critical patent/WO2024142082A1/fr
Anticipated expiration legal-status Critical
Pending legal-status Critical Current

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Classifications

    • 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
    • G02B6/10—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type
    • G02B6/12—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type of the integrated circuit kind
    • G02B6/12007—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type of the integrated circuit kind forming wavelength selective elements, e.g. multiplexer, demultiplexer
    • 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
    • G02B6/10—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type
    • G02B6/12—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type of the integrated circuit kind
    • G02B6/122—Basic optical elements, e.g. light-guiding paths
    • G02B6/124—Geodesic lenses or integrated gratings
    • 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
    • G02B6/26—Optical coupling means
    • G02B6/28—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals
    • G02B6/293—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means
    • G02B6/29346—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means operating by wave or beam interference
    • G02B6/29356—Interference cavity within a single light guide, e.g. between two fibre gratings

Definitions

  • the field of invention generally relates to integrated photonics. More specifically, it relates to a system and method for an ultra-compact DBR cavity design for photonics technology applications.
  • a developing area of photonics called integrated photonics combines numerous optical components and waveguides on a single chip.
  • the chip is made up of a number of material platforms that are preferably complementary metal oxide semiconductor (CMOS) compatible.
  • CMOS complementary metal oxide semiconductor
  • An optical resonator can enhance the optical signal at certain frequencies by repeated feedback or reflection within the device and suppress all other frequencies which results in narrow transmission or reflection bands of the signal at the output. Even though just one resonance mode is of importance for many applications, conventionally built resonator devices typically oscillate into numerous modes.
  • a 2-D photonic crystal cavity can generate a single resonance mode, but its design is relatively complicated, and it is difficult to incorporate the structure into traditional waveguide-based integrated photonic circuits. It is possible to construct a micro ring resonator or disc resonator with a broad free spectral range (FSR), however as the bend radius decreases below 10 ⁇ m (in the case of silicon-on-insulator), bend-induced losses take over.
  • FSR free spectral range
  • the present invention discloses a system and method for an ultra-compact DBR cavity design for photonics.
  • the system comprises an input strip waveguide followed by a rib waveguide configured to transmit a signal supported by a TE (Transverse Electric) guided fundamental mode.
  • TE Transverse Electric
  • the system comprises at least two distributed Bragg reflector (DBR) structures configured to receive the transmitted signal and to create plurality of reflections to achieve resonance in a cavity, wherein a part of the signal transmitted through a first DBR structure reflects in case Bragg condition is satisfied for a wavelength band, thereby retaining a non-reflected signal.
  • DBR distributed Bragg reflector
  • the present invention discloses a system and method for an ultra-compact DBR cavity design for photonics technology applications, comprises at least two broadband distributed Bragg reflector (DBR) structures, sub-micron waveguide cavity in between and input/output single mode waveguide structures.
  • the at least two DBR structures are adiabatically apodised, wherein the at least two DBR structures are integrated into a single-mode rib waveguide supporting only a TE (Transverse Electric) guided fundamental mode.
  • TE Transverse Electric
  • the system 100 comprises an input and an output strip waveguides 102/1 and 102/2, at least two rib waveguides 104/1 and 104/2, at least two distributed Bragg reflector (DBR) structures 106/1 and 106/2, and a cavity 108.
  • the at least two distributed Bragg reflector (DBR) structures 106/1 and 106/2 are a type of an optical reflectors used in plurality of photonic integrated circuits.
  • the at least two DBR structures 106/1 and 106/2 are but not limited to silicon structures.
  • At least two DBR structures 106/1 and 106/2 are waveguide reflectors, like that of optical fiber-based Bragg reflectors.
  • the at least two DBR are structures made of many layers of two or more materials with one or more refractive indices (one section of alternating materials defined as one grating period), and by changing a feature, such as the width of the alternating material layers with respect to each other or the grating period, which causes a periodic change in the effective refractive index in the guide.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Optical Integrated Circuits (AREA)

Abstract

La présente invention divulgue un système et un procédé pour une conception de cavité DBR ultra-compacte pour photonique. Le système (100) comprend un guide d'ondes à bande d'entrée (102/1) configuré pour transmettre un signal supporté par un mode fondamental guidé TE (électrique transversal). En outre, le système comprend au moins deux structures de réflecteur de Bragg distribué (DBR) (106/1, 106/2) configurées pour recevoir le signal transmis et pour créer une pluralité de réflexions à l'intérieur des deux structures DBR (106/1, 106/2) ou plus pour obtenir une résonance dans une cavité (108). En outre, le système comprend la cavité (108) configurée pour retenir une partie du signal sur la base d'une bande de longueur d'onde d'une condition de résonance sur la pluralité de réflexions qui s'est produite dans les deux structures DBR (106/1, 106/2) ou plus. Ensuite, le système comprend un guide d'ondes à bande de sortie (102/2) configuré pour collecter le signal retenu avec une bande passante résonante étroite.
PCT/IN2023/051144 2022-12-26 2023-12-07 Système et procédé pour une conception de cavité dbr ultra-compacte pour applications de technologie photonique Pending WO2024142082A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IN202241075651 2022-12-26
IN202241075651 2022-12-26

Publications (1)

Publication Number Publication Date
WO2024142082A1 true WO2024142082A1 (fr) 2024-07-04

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IN2023/051144 Pending WO2024142082A1 (fr) 2022-12-26 2023-12-07 Système et procédé pour une conception de cavité dbr ultra-compacte pour applications de technologie photonique

Country Status (1)

Country Link
WO (1) WO2024142082A1 (fr)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040156589A1 (en) * 2003-02-11 2004-08-12 Luxtera, Inc Optical waveguide grating coupler incorporating reflective optical elements and anti-reflection elements

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040156589A1 (en) * 2003-02-11 2004-08-12 Luxtera, Inc Optical waveguide grating coupler incorporating reflective optical elements and anti-reflection elements

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
SAH PARIMAL: "Integrated Photonics Filters with Distributed Bragg Reflector in Silicon-on-Insulator", THESIS, 6 April 2018 (2018-04-06), pages 1 - 131, XP093195462 *

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