Title :
Fully polarisation independent Mach-Zehnder optical switch using a lattice-matched InGaAlAs/InAlAs MQW and high-mesa waveguide structure
Author :
Yoshimoto, N. ; Shibata, Y. ; Oku, S. ; Kondo, S. ; Noguchi, Y. ; Wakita, K. ; Naganuma, M.
Author_Institution :
NTT Opto-Electron. Labs., Kanagawa, Japan
fDate :
7/18/1996 12:00:00 AM
Abstract :
Using a semiconductor Mach-Zehnder optical switch, the authors have succeeded in obtaining polarisation-independent operation with respect to switching voltage and insertion loss. A polarisation-independent phase shift can be obtained by using a lattice-matched InGaAlAs/InAlAs MQW structure. To reduce the insertion loss difference between polarisations, the authors used a multimode-interferometer 3 dB coupler and a high-mesa waveguide structure in the switch
Keywords :
III-V semiconductors; Mach-Zehnder interferometers; aluminium compounds; gallium arsenide; indium compounds; optical communication equipment; optical losses; optical planar waveguides; optical switches; optical waveguide components; semiconductor quantum wells; InGaAlAs-InAlAs; high-mesa waveguide structure; insertion loss; insertion loss difference; lattice-matched MQW; multimode-interferometer 3 dB coupler; polarisation independent Mach-Zehnder optical switch; polarisation-independent phase shift; switching voltage;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19960906
