MACH-ZEHNDER SWITCH USING AN ULTRA-COMPACT DIRECTIONAL COUPLER IN A STRONGLY-CONFINING RIB STRUCTURE

Authors
JANZ CF KEYWORTH BP ALLEGRETTO W MACDONALD RI FALLAHI M HILLIER G ROLLAND C
Citation
Cf. Janz et al., MACH-ZEHNDER SWITCH USING AN ULTRA-COMPACT DIRECTIONAL COUPLER IN A STRONGLY-CONFINING RIB STRUCTURE, IEEE photonics technology letters, 6(8), 1994, pp. 981-983
Citations number
7
Categorie Soggetti
Optics,"Physics, Applied
Journal title
IEEE photonics technology letters → ACNP
ISSN journal
10411135
Volume
6
Issue
8
Year of publication
1994
Pages
981 - 983
Database
ISI
SICI code
1041-1135(1994)6:8<981:MSUAUD>2.0.ZU;2-#
Abstract
A quantum well Mach-Zehnder switch operating at 1.55 mum, fabricated i n a strongly-confining rib waveguide structure, and employing a multi- mode 3-dB output coupler only 40 mum long, is described. The device yi elds almost 10 dB of contrast between outputs at 3 V bias, with 4.3 dB of excess coupler loss. The total cleaved device length is only 1.5 m m, and high bandwidth (15 GHz) operability is anticipated. A simple co mputer model of the coupler is in good agreement with the measured res ults, and predicts enhanced performance with a small increase in the c oupler length.