Polarization insensitive coherent lightwave detector

Details Polarization insensitive coherent lightwave detector Polarization insensitive coherent lightwave detector

1986-11-24

1988-01-05

Griffin, Robert L.

Telecommunications

Receiver or analog modulated signal frequency converter

Signal selection based on frequency

455616, H04B 900

Patent

active

047181206

ABSTRACT:
A coherent lightwave demodulator is disclosed which is insensitive to the polarization state of the incoming message signal. The demodulator includes a pair of optical hybrids (aligned to the polarization state of the local oscillator) and a pair of optical balanced receivers. A squaring arrangement, for example a delay demodulator, responsive to the output from the pair of optical balanced receivers eliminates the polarization-dependent component of the message signal and allows the recovery of the message signal regardless of the polarization state of the incoming message signal.

REFERENCES:
patent: 3214590 (1965-10-01), Schachtman
patent: 3971930 (1976-07-01), Fitzmaurice et al.
patent: 4506388 (1985-03-01), Monerie et al.
"Demodulation of Optical DPSK . . . ", Electronics Letters, vol. 21, No. 19, Sep. 1985, T. Hodgkinson, pp. 867-868.

Affiliated with

Also associated with

Rating

Polarization insensitive coherent lightwave detector does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Polarization insensitive coherent lightwave detector, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Polarization insensitive coherent lightwave detector will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-12926