Coherent optical fiber communications system using polarization

Details Coherent optical fiber communications system using polarization Coherent optical fiber communications system using polarization

1992-05-15

1993-10-26

Pascal, Leslie

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

359156, 359192, H04B 1004, H04B 1006

Patent

active

052571262

ABSTRACT:
A coherent optical communications system using polarisation modulation, wherein the polarisation modulation of the optical signals is obtained by using two lasers (1, 2) emitting orthogonally polarised radiations at different frequencies, which are combined without losses prior to transmission over the line (FIG. 1).

REFERENCES:
patent: 3435229 (1969-03-01), Buhrer et al.
patent: 5099351 (1992-03-01), O'Byrne
patent: 5105295 (1992-04-01), O'Byrne
Calvani et al, "Coherent Transmission Insensitive to Laser Phase Noise by Polarization Modulation and Differential Heterodyne Detection", ECOC 87, 13th Conference on Optical Communication Helsinki Finland, Sep. 13-17, 1987 vol. 3 pp. 9-12.
Kavehrad, "Polarization Insensitive FSK Optical Heterodyne Receiver Using Discriminator Demodulation", Journal Lightwave Technology, vol. 6 #9 Sep. 1988.
E. Dietrich et al., "Heterodyne Transmission of a 560 Mbit/s Optical Signal . . . ", Electronics Letters, vol. 23, No. 8, Apr. 9, 1987.
W. K. Burns et al., Depolarised Source for Fiber-Optic Applications, paper presented at OFC'91, San Diego, Calif., Feb. 18-22, 1991.
A. D. Kersey et al., New Polarisation-Insensitive Detection Technique for Coherent Optical Fibre Heterodyne Communications, Electronics Letters, vol. 23, No. 18, Aug. 27, 1987.

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