Broadband and compact arbitrary ratio curved directional coupler enabled by inverse design

Xiang Liu; Yingxuan Zhao; Fuwan Gan

doi:10.1117/12.3023772

18 March 2024 Broadband and compact arbitrary ratio curved directional coupler enabled by inverse design

Xiang Liu, Yingxuan Zhao, Fuwan Gan

Proceedings Volume 13104, Advanced Fiber Laser Conference (AFL2023); 131046D (2024) https://doi.org/10.1117/12.3023772
Event: Advanced Fiber Laser Conference (AFL2023), 2023, Shenzhen, China

Abstract

Silicon photonics has attracted considerable attention in datacom and telecom due to its Complementary- Metal-Oxide-Semiconductor (CMOS) compatibility, high integration, and low transmission loss. Optical splitter can be widely used as a building block in large-scale photonic integration chips, such as wave-division-multiplexing (WDM), optical modulating and optical switching. Suffering from waveguide dispersion, the power splitter exhibits high wavelength sensitivity. This imposes a huge impact on the overall performance of large-scale photonic integration. In order to achieve a significant optical response, we need to implement a beam splitter with large operating bandwidth and small footprint, as well as the ability to achieve arbitrary power-splitting-ratios. Enabled by inverse design, we propose broadband, compact arbitrary-ratio power splitters based on curved directional coupler (CDC). The enhanced particle swarm optimization (EPSO) algorithm is used to engineer the coupling region of the CDCs, greatly reducing the device footprint and improving the device optimization efficiency. The simulation results show that the proposed CDCs based on EPSO can achieve 80 nm operating bandwidth from 1260 nm to 1340 nm. The device coupling footprint can be reduced to 7.15 μm, with an excess loss of less than 0.01 dB. Inverse design allows for the reduction of the considerable time and labor required for manual adjustments. In addition, the optimization room of device footprint and operating bandwidth can be further exploited. With the comprehensive performance metrics, our proposed CDCs can be widely used in high-density photonic systems.

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Xiang Liu, Yingxuan Zhao, and Fuwan Gan "Broadband and compact arbitrary ratio curved directional coupler enabled by inverse design", Proc. SPIE 13104, Advanced Fiber Laser Conference (AFL2023), 131046D (18 March 2024); https://doi.org/10.1117/12.3023772

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available

Members: $17.00

Non-members: $21.00 ADD TO CART

PROCEEDINGS
5 PAGES

DOWNLOAD PAPER SAVE TO MY LIBRARY

GET CITATION

RIGHTS & PERMISSIONS

Get copyright permission Get copyright permission on Copyright Marketplace

KEYWORDS

Design

Waveguides

Directional couplers

Integrated optics

Mathematical optimization

Particle swarm optimization

Electroluminescence

Show All Keywords

Keywords/Phrases

Search In:

Publication Years