Optical power monitor device, optical amplifier, and optical tra

Details Optical power monitor device, optical amplifier, and optical tra Optical power monitor device, optical amplifier, and optical tra

1997-03-13

1998-12-08

Bacares, Rafael

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

359110, 359177, H04B 1008

Patent

active

058478566

ABSTRACT:
An optical power monitor device capable of monitoring optical power with the influence of optical crosstalk eliminated, and an optical amplifier and an optical transmitter each having the monitor device. The monitor device is applied to a light source for outputting first and second beams, for example. The first beam is divided into first and second branch beams by a beam splitter. The first branch beam is supplied to a first photodetector. The first photodetector outputs a first signal having a level corresponding to the power of the first branch beam. The second beam from the light source is supplied to a second photodetector. The second photodetector outputs a second signal having a level corresponding to the power of the second beam. The first and second signals are supplied to a first subtracter. The first subtracter outputs a first error signal corresponding to the difference between the first and second signals. The first signal and the first error signal are supplied to a second subtracter. The second subtracter outputs a second error signal corresponding to the difference between the first signal and the first error signal. Thus, the second error signal is obtained by using the first and second subtracters to thereby cancel a noise component caused by optical crosstalk and therefore eliminate the influence of optical crosstalk from the second error signal.

REFERENCES:
patent: 5162936 (1992-11-01), Taga et al.
patent: 5170274 (1992-12-01), Kuwata et al.
patent: 5184242 (1993-02-01), Yamashita
patent: 5282074 (1994-01-01), Miyazaki
patent: 5729373 (1998-03-01), Sakuyama

Affiliated with

Also associated with

Rating

Optical power monitor device, optical amplifier, and optical tra does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Optical power monitor device, optical amplifier, and optical tra, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optical power monitor device, optical amplifier, and optical tra will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-183873