Optical waveguides – With optical coupler
Patent
1997-01-29
1998-12-08
Healy, Brian
Optical waveguides
With optical coupler
385 11, 385 24, 385 1, 385122, 385 42, 359115, 359122, G02B 626, H04J 1400
Patent
active
058482059
ABSTRACT:
The invention relates to a non-linear optical mirror comprising an optical fiber loop that operates independently of the polarizations of the signals of respective wavelengths .lambda..sub.s and .lambda..sub.c present on its signal and control inputs. The loop of the NOLM is made up of four polarization-maintaining fiber segments having equivalent optical lengths. These four segments are optically optically interconnected by three splices at three locations. At the first and third splices, the neutral propagation axes of the polarization-maintaining fibers are turned through 90.degree.. According to the invention, a mode converter is inserted in the loop at the second splice, the converter comprising an optical demultiplexer and an optical multiplexer together with two polarization-maintaining optical paths inter-connecting them. The demultiplexer separates the two optical signals present at its input and applies them respectively to said two paths. On the path conveying the control signal, .lambda..sub.c, there is a splice including 90.degree. rotation of the polarization-maintaining neutral axes. On the other path, there is no rotation of the axes. The multiplexer then recombines the two signals. The invention is applicable to long distance telecommunications by optical fiber.
REFERENCES:
patent: 5357359 (1994-10-01), Uchiyama et al.
patent: 5592319 (1997-01-01), Lee et al.
patent: 5646759 (1997-07-01), Lichtman et al.
patent: 5687260 (1997-11-01), Liedenbaum
D. Sandel et al, "Polarization-independent regenerator with nonlinear optoelectronic phase-locked loop", OFC '94, optical fiber communications, vol. 4 1994, Technical Digest Series, Conference Edition (IEEE Cat. #94CH3422-3) 1994-Conference on Optical Fiber Communication, Feb. 20-25, 1994, Optical Society America, pp. 310-311.
D. Mahgerefteh et al, "Bandwidth and bit error rate performance of walk-off compensating 1.5/1.3 mu m wavelength converter", Electronics Letters, 3 Aug. 1995, UK, vol. 13, #16, ISSN 0013-5194, pp. 1380-1381.
N. A. Whitaker, "Polarization-Independent All-Optical Switching", IEEE Photonics Technology Letters, vol. 4, No. 3, 1 Mar. 1992, pp. 260-263.
ALCATEL N.V.
Healy Brian
LandOfFree
Polarization independent non-linear optical mirror 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 independent non-linear optical mirror, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Polarization independent non-linear optical mirror will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-187056