WO2018185576A3 - Waveguide taper for coupling waveguides of optical elements - Google Patents

Waveguide taper for coupling waveguides of optical elements Download PDF

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Publication number
WO2018185576A3
WO2018185576A3 PCT/IB2018/051507 IB2018051507W WO2018185576A3 WO 2018185576 A3 WO2018185576 A3 WO 2018185576A3 IB 2018051507 W IB2018051507 W IB 2018051507W WO 2018185576 A3 WO2018185576 A3 WO 2018185576A3
Authority
WO
WIPO (PCT)
Prior art keywords
taper
proposed
waveguide
mmi
compact
Prior art date
Application number
PCT/IB2018/051507
Other languages
French (fr)
Other versions
WO2018185576A2 (en
Inventor
Shankar Kumar Selvaraja
Anubhab HALDAR
Purnima SETHI
Original Assignee
Indian Institute Of Science
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 Science filed Critical Indian Institute Of Science
Publication of WO2018185576A2 publication Critical patent/WO2018185576A2/en
Publication of WO2018185576A3 publication Critical patent/WO2018185576A3/en

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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
    • G02B6/122—Basic optical elements, e.g. light-guiding paths
    • G02B6/1223—Basic optical elements, e.g. light-guiding paths high refractive index type, i.e. high-contrast waveguides
    • 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
    • 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
    • G02B6/12004—Combinations of two or more optical elements
    • 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
    • G02B6/12009—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 comprising arrayed waveguide grating [AWG] devices, i.e. with a phased array of waveguides
    • G02B6/12014—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 comprising arrayed waveguide grating [AWG] devices, i.e. with a phased array of waveguides characterised by the wavefront splitting or combining section, e.g. grooves or optical elements in a slab waveguide
    • 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
    • G02B6/1228—Tapered waveguides, e.g. integrated spot-size transformers
    • 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
    • G02B6/14—Mode converters
    • 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
    • G02B2006/12083—Constructional arrangements
    • G02B2006/12107—Grating

Abstract

A compact waveguide taper with larger bandwidth, low insertion loss, low reflection and high tolerance to fabrication imperfections and a method for generating same is disclosed. Proposed taper is formed using a quadratic sinusoidal function working on multimode interference (MMI) instead of adiabatic mode transition. By using MMI, phase matching condition along length of the proposed compact taper is overcome. In an exemplary embodiment, proposed taper is used to connect a 10 µm wide Si waveguide with a 0.5 µm Si waveguide. The proposed taper has a transmission efficiency of 92% for a length of 15 µm. Theoretical calculation shows an operational bandwidth of over 600 nm covering O, C, and L-bands. The transmission efficiencies have insignificant degradation under slight width deviations commonly found during fabrication.
PCT/IB2018/051507 2017-04-07 2018-03-08 Waveguide taper for coupling waveguides of optical elements WO2018185576A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IN201741012488 2017-04-07
IN201741012488 2017-04-07

Publications (2)

Publication Number Publication Date
WO2018185576A2 WO2018185576A2 (en) 2018-10-11
WO2018185576A3 true WO2018185576A3 (en) 2018-11-22

Family

ID=63713380

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2018/051507 WO2018185576A2 (en) 2017-04-07 2018-03-08 Waveguide taper for coupling waveguides of optical elements

Country Status (1)

Country Link
WO (1) WO2018185576A2 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10921518B2 (en) 2019-05-23 2021-02-16 International Business Machines Corporation Skewed adiabatic transition
US10802120B1 (en) 2019-08-20 2020-10-13 Luminar Technologies, Inc. Coherent pulsed lidar system
CN110908215B (en) * 2019-11-27 2021-04-20 浙江大学 Optical waveguide dispersion regulation and control device for nonlinear process and design method thereof
US11150407B2 (en) 2020-03-17 2021-10-19 Globalfoundries U.S. Inc. Optical couplers with non-linear tapering
US20220043202A1 (en) * 2020-08-10 2022-02-10 Luminar, Llc Semiconductor optical amplifier with bragg grating
CN114252955B (en) * 2021-12-09 2023-07-04 南通大学 Efficient design method of heat insulation mode connector

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
FU Y ET AL.: "Efficient adiabatic silicon-on-insulator waveguide taper", PHOTONICS RESEARCH, vol. 2, no. 3, 1 June 2014 (2014-06-01), pages A41 - A44, XP055552275 *
LUYSSAERT B ET AL.: "Efficient nonadiabatic planar waveguide tapers", JOURNAL OF LIGHTWAVE TECHNOLOGY, vol. 23, no. 8, 1 August 2005 (2005-08-01), pages 2462 - 2468, XP011138121 *
TOVAR AA ET AL.: "Beam propagation in parabolically tapered graded-index waveguides", APPLIED OPTICS, vol. 33, no. 33, 20 November 1994 (1994-11-20), pages 4395 - 4403, XP000484649 *

Also Published As

Publication number Publication date
WO2018185576A2 (en) 2018-10-11

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