Optical receiver and optical transmission system using the recei

Details Optical receiver and optical transmission system using the recei Optical receiver and optical transmission system using the recei

1995-06-21

1997-01-14

Williams, Hezron E.

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

359189, 359154, H04J 1402, H04B 1000, H04B 1006

Patent

active

055945775

ABSTRACT:
In an optical receiver of the present invention, an optical signal is split into at least two light portions, and the light portions are respectively received by at least two tunable optical filters. The tunable optical filters are respectively capable of changing their transmission wavelengths. Transmitted lights through the tunable optical filters are received by at least two light receiving elements. The light receiving elements respectively supply outputs. A differential amplifier produces a difference signal from the outputs of the light receiving elements. In an optical FDM-FSK transmission system using the optical receiver, an optical FSK signal is received by utilizing the difference signal. The tracking operation of the tunable optical filters, whose object includes, for example, at least a center optical frequency of the tunable filters, can be readily performed.

REFERENCES:
patent: 4989199 (1991-01-01), Rzeszewski
patent: 5020153 (1991-05-01), Choa et al.
patent: 5023950 (1991-06-01), Tsushima et al.
patent: 5077816 (1991-12-01), Glomb et al.
patent: 5105295 (1992-04-01), O'Byrne
patent: 5170402 (1992-12-01), Ogita et al.
patent: 5247382 (1993-09-01), Suzuki
patent: 5274490 (1993-12-01), Tsushima et al.
patent: 5299045 (1994-03-01), Sekiguchi
patent: 5305134 (1994-04-01), Tsushima et al.
patent: 5408349 (1995-04-01), Tsushima et al.
T. L. Koch, et al., "InP-Based Photonic integrated circuits", pp. 139-147, vol. 138, No. 2, Apr. 1991, Stevenage GB, IEE Proceedings J. Optoelectronics.
H. Toba et al., "A 100-Channel Optical FDM Transmission/Distribution at 622 Mb/s over 50 km", pp. 1396-1401, vol. 8, No. 9, Journal of Lightwave Technology, Sep. 1990.
G. Jacobsen, "Preamplifier Implementation of ASK and Limiter-Discriminator FSK Systems", pp. 1359-1361, vol. 28, No. 14, Electronics Letter, Stevenage GB, Jul. 2, 1992.
Hiromu Toda, et al., "A 100-Channel Optical FDM Transmission/Distribution System", vol. 89, No. 459, OCS 89-64, (NTT Transmission Systems Labs. and NTT Opto-Electronics Labs.), Mar. 16, 1992.
T. Numai, et al., "Semiconductor Tunable Wavelength Filters", vol. 88, No. 239, OQE 88-65, (Opto-Electronics Res. Labs., C&C Systems Res. Labs., NEC Corporation), Oct. 24, 1988.
I. P. Kaminow et al., Journal of Lightwave Technology, FDMA-FSK Star Network with a Tunable Optical Filter Demultiplexer, vol. 6, No. 9, Sep., pp. 1406-1414, 1988.
Prucnal, Journal of Optical Communication, Wideband FSK Optical Fiber Communication Experiment, vol. 4, Sep., pp. 99-103, 1983.
T. Numai et al., Semiconductor Tunable Wavelength Filter, OQE 88-65, 1988.

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