Polarization diversity receiver having little deteriorated sensi

Details Polarization diversity receiver having little deteriorated sensi Polarization diversity receiver having little deteriorated sensi

1989-05-22

1990-11-20

Orsino, Joseph A.

Telecommunications

Receiver or analog modulated signal frequency converter

Signal selection based on frequency

455616, G02F 200

Patent

active

049725157

ABSTRACT:
In a polarization diversity receiver comprising demodulator circuits (31, 32) which may have a restricted dynamic range, input intermediate frequency signals are supplied from optical detectors (16, 17) to automatic gain controllers (21, 22) for producing output intermediate frequency signals with their intensities adjusted optimal to the respective demodulator circuits irrespective of a fluctuation which may appear in a polarization state of a signal beam supplied to the receiver. Supplied with the output intermediate frequency signals, the demodulator circuits deliver baseband signals to a signal combiner (43) with their intensities adjusted so as to have a ratio which is equal to a square of a ration between intensities of the input intermediate frequency signals. This makes the receiver have a reception sensitivity which is least deteriorated by polarization diversity. Each automatic gain controller comprises a variable gain adjuster (26, 28) which may be either feed forward or feedback controlled by a control signal produced by an intensity detector (25, 27). Each demodulator circuit comprises another variable gain adjuster (41, 42) controlled by the control signal.

REFERENCES:
Dolato Smith, "Techniques for Multigigabit Coherent Optical Transmission", Journal of Lightwave Tech., vol. LT-5, No. 10, Oct. 1987, pp. 1466-1478.

Affiliated with

Also associated with

Rating

Polarization diversity receiver having little deteriorated sensi 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 diversity receiver having little deteriorated sensi, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Polarization diversity receiver having little deteriorated sensi will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-461018