Optical communications – Receiver
Reexamination Certificate
2006-11-29
2010-11-30
Liu, Li (Department: 2613)
Optical communications
Receiver
C359S325000, C398S212000, C398S214000, C398S188000
Reexamination Certificate
active
07844189
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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Han Won-Taek
Hanawa Masanori
Hann Swook
Kim Sun-Jong
Kim Tae-Young
Gwangju Institute of Science & Technology
Liu Li
LandOfFree
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