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

Simple analytical calculation and experimental demonstration of optical 90 ° hybrids based on tapered 2 × 4 and 2 × 2 multimode interference couplers

Not Accessible

Your library or personal account may give you access

Abstract

We report a simple analytical calculation method for evaluating relative phase relations of tapered 2×4 multimode interference (MMI) couplers in a novel optical 90° hybrid. By using the proposed calculation model, the tapered 2×4 MMI coupler can easily be optimized to achieve phase matching with a 2×2 MMI coupler in the novel optical 90° hybrid. It was theoretically clarified that for several kinds of tapered MMI shapes, the proposed calculation model provides accurate solutions as long as the contribution of mode interference is much greater than that of mode conversion in the tapered MMI region. Based on the calculation model, we fabricated the optical 90° hybrid consisting of the linearly tapered 2×4 MMI coupler and the 2×2 MMI coupler. The extinction ratios of the measured transmission spectra via a delayed interferometer were comparable for in-phase and quadrature channels. This indicates that the phase matching was achieved by the tapered 2×4 MMI coupler and verifies the validity of the proposed calculation model.

© 2010 Optical Society of America

Full Article  |  PDF Article
More Like This
Ultra-compact optical 90° hybrid based on a wedge-shaped 2 × 4 MMI coupler and a 2 × 2 MMI coupler in silicon-on-insulator

Wei Yang, Mei Yin, Yanping Li, Xingjun Wang, and Ziyu Wang
Opt. Express 21(23) 28423-28431 (2013)

Optical 45° hybrid for demodulating 8-ary DPSK signal

Seok-Hwan Jeong and Ken Morito
Opt. Express 18(8) 8482-8490 (2010)

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 (9)

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

Equations (18)

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