发明名称 |
OPTICAL DIFFERENTIAL-PHASE-SHIFT-KEYED DEMODULATOR APPARATUS AND METHOD |
摘要 |
A system and method for demodulating an optical differential-phase-shift-keyed (DPSK) input signal using a Fabray-Perot etalon filter. In one embodiment the system receives a transmitted wavefront from the etalon filter and uses a detector to generate an electrical waveform from the transmitted wavefront. A comparator is used to receive an output from the detector and to generate a signal in accordance with each phase shift (i.e., bit transition) in the optical DPSK input signal. A latching flip-flop receives an output from the comparator and generates a digital signal representative of the bit pattern of the DPSK input signal. The system and method does not require the precisely matched dual optical paths of a Mach-Zehnder interferometer, and therefore is substantially less susceptible to thermal effects that could influence the operation of a conventional Mach-Zehnder interferometer in DPSK demodulation operations.
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申请公布号 |
US2008226300(A1) |
申请公布日期 |
2008.09.18 |
申请号 |
US20070684970 |
申请日期 |
2007.03.12 |
申请人 |
MAYER RICHARD C;BALESTRA CHESTER L |
发明人 |
MAYER RICHARD C.;BALESTRA CHESTER L. |
分类号 |
H04B10/00 |
主分类号 |
H04B10/00 |
代理机构 |
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地址 |
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