Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group

Highly efficient and ultracompact InP/InGaAsP three-port trench-based couplers

Not Accessible

Your library or personal account may give you access

Abstract

Existing photonic couplers are limited by either large footprint or long interaction length. Here a highly efficient and ultracompact three-port trench-based coupler (TBC) is proposed on an InP platform in terms of the frustrated total internal reflection principle. A single slash-shaped narrow trench located at the “T” intersection of two InP/InGaAsP multiquantum well ridge waveguides forms the coupler. The finite-difference time-domain numerical method is utilized to optimize the parameterization of the couplers, such as splitting ratios and efficiency versus trench widths, lengths, locations, and angles. A single-mode 2 µm wide ridge waveguide coupler having a high aspect ratio trench filled with ${{\rm Al}_2}{{\rm O}_3}$ was fabricated and characterized at 1.55 µm wavelength. The “trench-first” fabrication process is optimized to reduce its inherent insertion loss (IL), showing the IL within a range of 0.3–0.5 dB. The devices can outperform the state-of-the-art trench couplers by $ \ge \;\sim{24}$ times the figure of merit. These TBCs are thus promising candidates for applications in the next generation of photonic integrated circuits.

© 2020 Optical Society of America

Full Article  |  PDF Article
More Like This
Compact InGaAsP/InP nonblocking 4 × 4 trench-coupler-based Mach–Zehnder photonic switch fabric

Ke Liu, Le Wang, Chenglong Zhang, Qingyu Ma, and Bing Qi
Appl. Opt. 57(14) 3838-3846 (2018)

Silicon photonics 2 × 2 trench coupler design and foundry fabrication

Hiva Shahoei, Ifeanyi G. Achu, Evan J. Stewart, Unaiza Tariq, William V. Oxford, Mitchell A. Thornton, and Duncan L. MacFarlane
Appl. Opt. 61(16) 4927-4931 (2022)

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Figures (11)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Tables (4)

You do not have subscription access to this journal. Article tables are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Equations (9)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Select as filters


Select Topics Cancel
© Copyright 2024 | Optica Publishing Group. All Rights Reserved