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1. 发明申请

US20110188867A1 DQPSK DEMODULATOR 有权
公开(公告)号：US20110188867A1
公开(公告)日：2011-08-04
申请号：US12978244
申请日：2010-12-23
申请人： Huiping Li , Xiaolin Chen , Fan Chen , Fahua Lan , Kevin Dapend Zhang
发明人： Huiping Li , Xiaolin Chen , Fan Chen , Fahua Lan , Kevin Dapend Zhang
IPC分类号： H04B10/04
摘要： A phase shift keyed demodulator includes first and second beam splitters, a first optical path, a second optical path, and a wavelength tuner. The first beam splitter splits an input signal into first and second output signals. The second beam splitter splits each first and second output signal into a transmitted signal and a reflected signal. The first optical path includes an optical path of each transmitted signal from a beam splitting surface to a reflector and back to the beam splitting surface. The second optical path includes an optical path of each reflected signal from the beam splitting surface to a mirror surface and back to the beam splitting surface. A path difference introduces a delay between the transmitted signal and the reflected signal. The wavelength tuner tunes the demodulator to a predetermined central wavelength and introduces a phase shift between first and second transmitted signals.
摘要翻译：相移键控解调器包括第一和第二分束器，第一光路，第二光路和波长调谐器。第一分束器将输入信号分成第一和第二输出信号。第二分束器将每个第一和第二输出信号分离成发射信号和反射信号。第一光路包括从分束表面到反射器的每个发射信号的光路，并且返回到分束表面。第二光路包括从分束表面到镜面并且返回到分束表面的每个反射信号的光路。路径差引入发射信号和反射信号之间的延迟。波长调谐器将解调器调谐到预定的中心波长，并引入第一和第二发射信号之间的相移。

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