Staas & Halsey LLP
Interferometer for demodulating differential M-phase shift keying signal
An interferometer for demodulating a differential M-phase shift keying signal includes a PLC type interferometer main body, a heating portion that heats the PLC type interferometer main body, and an intermediate member having a higher stiffness than that of the PLC type interferometer main body, for bonding the PLC type interferometer main body and the heating portion with each other while being sandwiched therebetween. A linear expansion coefficient difference between the PLC type interferometer main body and the intermediate member is equal to or smaller than 4.5×10−6/° C., and a thermal conductivity difference between the PLC type interferometer main body and the intermediate member is equal to or larger than 10 W/mK. A phase of an optical signal flowing through the interferometer is adjusted by using the heating portion and a second heating portion.
Yokogawa Electric Corporation Fujitsu Limited Hitachi Cable Ltd.
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Jens Takeshi Hiroyuki Hideaki Satoshi Akihiko Yasuyuki Kentaro Akira Morio Takafumi Hiroshi George
Rasmussen Hoshida Matsuura Arai Takasugi Isomura Suzuki Nakamura Miura Wada Terahara Onaka Ishikawa