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Design of an extra-low-loss broadband Y-branch waveguide splitter based on a tapered MMI structure

Design of an extra-low-loss broadband Y-branch waveguide splitter based on a tapered MMI structure
Design of an extra-low-loss broadband Y-branch waveguide splitter based on a tapered MMI structure
An optimal design for an extra-low loss buried waveguide Y-branch splitter is presented over a broadband wavelength range from 1500~1600 nm. A tapered multimode waveguide section, earlier used to reduce the excess loss, is optimized when the light distribution at the end of the multimode waveguide section is matched to the profile of the symmetric supermode for the structure of the two branching waveguides. An optimization that combines genetic algorithm and a gradient-based search method are used to obtain the optimal geometrical parameters for the multimode waveguide section as well as the widths for the input and branching waveguides. An excess loss of 0.015 dB @1550 nm was obtained after the proposed optimization. For these optimized parameters, even when packaging induces a typical offset between input standard singlemode fibre and waveguide, the wavelength dependence of the output ratio between the two branches is small (less than 0.03 dB).
Wang, Pengfei
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Brambilla, Gilberto
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Semenova, Yuliya
6e64157c-40b6-4eb5-938c-ae2dd348f652
Wu, Qiang
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Farrell, Gerald
6c4b8f27-d88c-41a2-87ff-f2466225798f
Wang, Pengfei
a1ba240f-d4f0-4150-bcd8-cb418e841dcb
Brambilla, Gilberto
815d9712-62c7-47d1-8860-9451a363a6c8
Semenova, Yuliya
6e64157c-40b6-4eb5-938c-ae2dd348f652
Wu, Qiang
fad3844e-9eba-496c-876d-3bbc9ee4a689
Farrell, Gerald
6c4b8f27-d88c-41a2-87ff-f2466225798f

Wang, Pengfei, Brambilla, Gilberto, Semenova, Yuliya, Wu, Qiang and Farrell, Gerald (2011) Design of an extra-low-loss broadband Y-branch waveguide splitter based on a tapered MMI structure. 30th Progress in Electromagnetics Research Symposium (PIERS 2011), Suzhou, China. 11 - 15 Sep 2011.

Record type: Conference or Workshop Item (Paper)

Abstract

An optimal design for an extra-low loss buried waveguide Y-branch splitter is presented over a broadband wavelength range from 1500~1600 nm. A tapered multimode waveguide section, earlier used to reduce the excess loss, is optimized when the light distribution at the end of the multimode waveguide section is matched to the profile of the symmetric supermode for the structure of the two branching waveguides. An optimization that combines genetic algorithm and a gradient-based search method are used to obtain the optimal geometrical parameters for the multimode waveguide section as well as the widths for the input and branching waveguides. An excess loss of 0.015 dB @1550 nm was obtained after the proposed optimization. For these optimized parameters, even when packaging induces a typical offset between input standard singlemode fibre and waveguide, the wavelength dependence of the output ratio between the two branches is small (less than 0.03 dB).

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More information

e-pub ahead of print date: 2011
Venue - Dates: 30th Progress in Electromagnetics Research Symposium (PIERS 2011), Suzhou, China, 2011-09-11 - 2011-09-15
Organisations: Optoelectronics Research Centre

Identifiers

Local EPrints ID: 341349
URI: http://eprints.soton.ac.uk/id/eprint/341349
PURE UUID: 77ecb82a-6b79-4e80-8bac-8db9fd729ba8
ORCID for Gilberto Brambilla: ORCID iD orcid.org/0000-0002-5730-0499

Catalogue record

Date deposited: 20 Jul 2012 10:41
Last modified: 02 Apr 2022 01:38

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Contributors

Author: Pengfei Wang
Author: Yuliya Semenova
Author: Qiang Wu
Author: Gerald Farrell

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