发明名称 Phase control apparatus and optical DQPSK receiver
摘要 A calculation processing unit controls temperature of a Peltier device based on a slope of a waveform obtained by subtracting a waveform of a B-arm monitoring signal from a waveform of an A-arm monitoring signal and a value obtained by subtracting a value B of the B-arm monitoring signal from a value A of the A-arm monitoring signal. Similarly, the calculation processing unit controls a phase of the A-arm and a phase of the B-arm. An A-arm side micro-controller controls temperature of an A-arm side heater 22 based on the value of the A-arm monitoring signal, and controls the phase of the A-arm. A B-arm side micro-controller controls temperature of a B-arm side heater based on the value B of the B-arm monitoring signal, and controls the phase of the B-arm.
申请公布号 US7684713(B2) 申请公布日期 2010.03.23
申请号 US20060593591 申请日期 2006.11.07
申请人 FUJITSU LIMITED 发明人 TERAYAMA YOSHIKAZU;MIZUGUCHI NORIAKI;ISHIKAWA EIJI;TOYOMAKI TAKASHI;KABURAGI KENICHI;HOSHIDA TAKESHI;RASMUSSEN JENS;ISOMURA AKIHIKO
分类号 H04B10/00 主分类号 H04B10/00
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