Method for controlling polarizations of signal lights in an opti

Details Method for controlling polarizations of signal lights in an opti Method for controlling polarizations of signal lights in an opti

1990-03-16

1991-04-16

Dzierzynski, Paul M.

Multiplex communications

Wide area network

Packet switching

350 9615, 350371, 350374, 370 2, 370 3, 455615, 455619, H04B 1000, G02F 200

Patent

active

050076930

ABSTRACT:
Frequency division multiplex signal lights are propagated through an optical fiber, and polarizations of the lights are collectively controlled by a polarization controller. The polarization-controlled signal lights are received separately in receiving systems including optical heterodyne or homodyne receivers. In the collective polarization control, a step is selected from steps of controlling relative polarization states of local oscillation lights to coincide to each other, receiving a control signal from one of the receiving systems which receives a signal light of a frequency to be allocated in the center of a frequency band of the signal lights or the vicinity thereof, and dividing the frequency division multiplex signal lights into plural groups, thereby controlling polarizations collectively in each of the plural groups. One of the polarizations of the signal lights may be orthogonal to the others, and one of the polarizations of the local oscillation lights may be orthogonal to the others correspondingly.

REFERENCES:
patent: 3727062 (1973-04-01), Foster
patent: 3908121 (1975-09-01), Riseberg et al.
patent: 4467468 (1984-08-01), Miller
patent: 4703474 (1987-10-01), Foschini et al.
patent: 4831663 (1989-05-01), Smith
patent: 4856093 (1989-08-01), Mohr
patent: 4888817 (1989-12-01), Ryu et al.
patent: 4903342 (1990-02-01), Yamazaki
patent: 4912527 (1990-03-01), Yamazaki
patent: 4956834 (1990-09-01), Coleman
patent: 4970713 (1990-11-01), Imoto

Affiliated with

Also associated with

Rating

Method for controlling polarizations of signal lights in an opti does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method for controlling polarizations of signal lights in an opti, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for controlling polarizations of signal lights in an opti will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-416491