All-optical polarization independent optical time division multi

Details All-optical polarization independent optical time division multi All-optical polarization independent optical time division multi

1993-08-11

1994-10-18

Chilcot, Jr., Richard E.

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

359122, 359138, 385 11, 385 24, H04J 400

Patent

active

053573595

ABSTRACT:
An all-optical polarization independent optical time division multiplexer and demultiplexer which are stable as well as very fast, while being independent of the polarization state of the input optical signal pulses. The demultiplexer has a wavelength-division-multiplexing coupler for wavelength-division-multiplexing time-division-multiplexed optical signal pulses and optical control pulses, and splitting the optical signal pulses at a splitting ratio of 1:1 into two ports, the optical control pulses being in a polarization state in which two orthogonally polarized components have a substantially identical amplitude; an optical Kerr medium with birefringence, for connecting two ports of the wavelength-division-multiplexing coupler, the optical Kerr medium incorporating a birefringence compensation mechanism for compensating a polarization dispersion between two principal axes of the birefringence; and a wavelength division demultiplexer for wavelength-division-demultiplexing time-wise overlapping optical signal pulses and optical control pulses propagated through the optical Kerr medium, to obtain time-division-demultiplexed optical signal pulses. In the multiplexer, the input and output relationship is reversed in the same configuration.

REFERENCES:
patent: 4761050 (1988-08-01), Byron
"All-optical Multistage Demultiplexers Operated by Logical Permutations of Control Pulses" Mori et al., IEEE Transactional Photonics Tech. Letters, vol. 3, No. 12, Dec. 1991, pp. 1130-1133.
"Ultrafast Polarization-Independent Optical Demultiplexer Using Optical Carrier Frequency Shift Through Cross Phase Modulation" Morioka et al., Electronics Letters, vol. 28, No. 11, May 21, 1992-pp. 1070-1072.
"Nonlinear Sagnac Interferometer Switch and Its Application" Jinno et al., IEEE Journal of Quantum Electronics, vol. 28, No. 4, Apr. 1992-pp. 875-882.
Article entitled Ultrafast, Low Power, and Highly Stable All-Optical Switching in an All Polarization Maintaining Fiber Sagnac Interferometer from IEEE Photonics Technology Letters, vol. 2, No. 5, May 1990, pp. 349-351.
Article entitled Polarization-Independent All-Optical Switching from IEEE Photonics Technology Letters, vol. 4 No. 3, dated Mar. 1992, pp. 260 263.
Article entitled Optical Sampling Oscilloscope Using Nonlinear Fibre Loop Mirror dated Nov. 28, 1990 from Electronics Letters dated Jan. 31, 1991 pp. 204 205.

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