Invention Grant
- Patent Title: Phase controllable optical delay interferometer, optical differential phase shift keying demodulator using the same, and demodulating method therefor
- Patent Title (中): 相位可控光延迟干涉仪，光差分相移键控解调器及其解调方法
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Application No.: US11564291Application Date: 2006-11-29
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Publication No.: US07844189B2Publication Date: 2010-11-30
- Inventor: Chang-Soo Park , Tae-Young Kim , Masanori Hanawa , Sun-Jong Kim , Swook Hann , Won-Taek Han
- Applicant: Chang-Soo Park , Tae-Young Kim , Masanori Hanawa , Sun-Jong Kim , Swook Hann , Won-Taek Han
- Applicant Address: KR Gwangju
- Assignee: Gwangju Institute of Science & Technology
- Current Assignee: Gwangju Institute of Science & Technology
- Current Assignee Address: KR Gwangju
- Priority: KR10-2005-0115415 20051130
- Main IPC: H04B10/06
- IPC: H04B10/06 ; G02F2/00
Abstract:
An optical DPSK signal demodulator includes a signal separator that separates an optical signal into an input optical signal and an output optical signal in a signal optical path. First and second reflectors are provided at a predetermined interval and reflect the optical signals with a predetermined time delay to have substantially the same intensity. A phase shifter is provided between the first and second reflectors and configured to allow the optical signals reflected from the first and second reflectors to have a phase difference.
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