Switching Characteristics in Variable-Index Arrayed Waveguides Using Thin-Film Heater

Satoshi YANAGI  Yosuke MURAKAMI  Yuki YAMAZAKI  Kazuhiko SHIMOMURA 

Publication
IEICE TRANSACTIONS on Electronics  Vol.E95-C  No.7  pp.1265-1271
Publication Date: 2012/07/01
Online ISSN: 1745-1353
Print ISSN: 0916-8516
Type of Manuscript: Special Section PAPER (Special Section on Recent Progress in Active Photonic Device Technologies)
Category: 
Keyword: 
arrayed waveguides,  multiple quantum well (MQW),  metal-organic vapor phase epitaxy (MOVPE),  wavelength switch,  thermo-optic effect, 

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Summary: 
We have demonstrated switching characteristics in a wavelength switch based on multiple GaInAs/InP quantum wells. It consisted of straight arrayed waveguides with a linearly varying refractive index distribution. The refractive index can be changed via the thermo-optic (TO) effect. Using a Ti/Au thin-film heater to generate the TO effect, we realized four-port switching at four demultiplexed wavelengths. In addition, by changing the structure of the heater from rectangular to triangular, the power consumption for four-port switching was reduced by half.