Optical waveguides – With optical coupler – Particular coupling function
Patent
1992-01-27
1992-10-13
Gonzalez, Frank
Optical waveguides
With optical coupler
Particular coupling function
385 42, 372 6, G02B 626
Patent
active
051557800
ABSTRACT:
This invention relates to an optical limiting amplifier which provides an optical output signal of substantially constant power for an optical input signal of varying power which is simple to construct and economical to build. In this invention, an optical signal whose power can fluctuate over a wide range is split into two signals. The first signal is applied to an optical fiber amplifier in the forward feed direction. The second signal is passed through a saturable absorber and then applied to the optical fiber amplifier in the backward feed direction. The signal from the saturable absorber varies at a rate which is greater than the rate that the signal to the saturable absorber varies. Thus, as the signal to the saturable absorber increases, the signal from the saturable absorber will increase at a greater rate; and, as the signal to the saturable absorber decreases, the signal from the saturable absorber will decrease at a greater rate. The backward feed signal effects the gain saturation of the optical fiber amplifier in such a way as to cause the output power of the optical fiber amplifier to be constant regardless of variations to the input signal power.
REFERENCES:
patent: 4674830 (1987-06-01), Shaw et al.
patent: 4723824 (1988-02-01), Shaw et al.
patent: 4778237 (1988-10-01), Sorin et al.
patent: 5050949 (1991-09-01), DiGiovanni et al.
patent: 5058974 (1991-10-01), Mollenauer
"High Gain Limiting Erbium-Doped Fibre Amplifier With Over 30 dB Dynamic Range", W. I. Way et al., Electronics Letters, vol. 27, No. 3, Jan. 31, 1991, pp. 211-213.
AT&T Bell Laboratories
Gonzalez Frank
Weiss E.
LandOfFree
Optical limiting amplifier 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 limiting amplifier, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optical limiting amplifier will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1307078