发明授权
- 专利标题： Interferometer for demodulating differential M-phase shift keying signal
- 专利标题（中）： 用于解调差分M相移键控信号的干涉仪
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申请号： US11651591申请日： 2007-01-10
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公开(公告)号： US07860408B2公开(公告)日： 2010-12-28
- 发明人: Akihiko Isomura , Jens Rasmussen , Takafumi Terahara , Kentaro Nakamura , Takeshi Hoshida , George Ishikawa , Hiroshi Onaka , Morio Wada , Hiroyuki Matsuura , Akira Miura , Yasuyuki Suzuki , Hideaki Arai , Satoshi Takasugi
- 申请人： Akihiko Isomura , Jens Rasmussen , Takafumi Terahara , Kentaro Nakamura , Takeshi Hoshida , George Ishikawa , Hiroshi Onaka , Morio Wada , Hiroyuki Matsuura , Akira Miura , Yasuyuki Suzuki , Hideaki Arai , Satoshi Takasugi
- 申请人地址： JP Kawasaki JP Tokyo JP Tokyo
- 专利权人： Fujitsu Limited,Yokogawa Electric Corporation,Hitachi Cable Ltd.
- 当前专利权人： Fujitsu Limited,Yokogawa Electric Corporation,Hitachi Cable Ltd.
- 当前专利权人地址： JP Kawasaki JP Tokyo JP Tokyo
- 代理机构： Staas & Halsey LLP
- 优先权： JP2006-019607 20060127
- 主分类号： H04B10/06
- IPC分类号： H04B10/06
摘要：
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.