Title

Electrically Tunable 2X2 Multimode Interference Coupler

Keywords

Carrier induced index; Diffusion; Electro-optic; Integrated optics; MMI; Multimode interference; Quantum-well devices; Semiconductor; Tunable coupler

Abstract

An electrically tunable 2x2 multimode interference (MMI) coupler is demonstrated. The response of the MMI is tuned by modifying the phase of the multiple self-images that occur at the middle point of the MMI waveguide. Since the required phase change is achieved by electrical current injection, a zinc in-diffusion process was implemented to selectively define p-n regions and effectively regulate current spreading by controlling the depth of the zinc doping. Our experimental results revealed that the device can be easily set to a perfect 3 dB splitter using only 0.7 mA of current injection. In addition, the device can be adjusted all the way from a 90:10 to a 30:70 splitting ratio. To our knowledge, this degree of tuning of the optical power has never been experimentally demonstrated in MMI devices. Furthermore, this concept can easily be applied to a wide variety of semiconductor photonic switches that operate on MMI effects. © 2008 American Institute of Physics.

Publication Date

5-21-2008

Publication Title

AIP Conference Proceedings

Volume

992

Number of Pages

276-281

Document Type

Article; Proceedings Paper

Personal Identifier

scopus

DOI Link

https://doi.org/10.1063/1.2926870

Socpus ID

43649097778 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/43649097778

This document is currently not available here.

Share

COinS