Method and apparatus for reduction of optical communication syst

Details Method and apparatus for reduction of optical communication syst Method and apparatus for reduction of optical communication syst

1993-11-12

1994-12-13

Chilcot, Jr., Richard E.

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

319125, 319132, 319182, 319183, H04B 1000

Patent

active

053733851

ABSTRACT:
A method and apparatus for reducing noise in optical communication systems is effected by modulating or dithering the laser output frequency at a relatively low rate. The laser may be dithered by applying a low frequency sine wave either to the resistive heater in the phase control section or to the laser's active section directly. By dithering the laser at a low frequency and at a sufficiently high amplitude to cause large optical frequency excursions, the noise caused by multipath interference will decrease without substantially increasing negative dispersion effects.

REFERENCES:
patent: 4357713 (1982-11-01), Blackbthrn et al.
Cebulla, U., Bouayad, J., Haisch, H., Klenk, M., Laube, G., Mayer, H. P., Weinmann, R. and Zielinski, E., "1.55 .mu.m Strained Layer Multiple Quantum Well DFB-Lasers With Low Chirp and Low Distortions For Optical Analog CATV Distribution Systems", CLEO '93 Wednesday Morning, CWA2, p. 226.
Darcie, Thomas E., Bodeep, George E., and Saleh, Adel A. M., "Fiber-Reflection-Induced Impairments in Lightwave AM-VSB CATV Systems," Journal of the Lightwave Technology, vol. 9, No. 8, Aug. 1991, pp. 991-995.
Judy, A. F. "Intensity Noise From Fiber Rayleigh Backscatter and Mechanical Splices," Proceedings of the 15th European Conference of Optical Communications, Gothenburg, Sweden, Sep. 10, 1989.
Mao, X. P., Bodeep, G. E., Tkach, R. W., Chraplyvy, A. R., Darcie, T. E., and Derosier, R. M., "Suppression of Brillouin Scattering in Lightwave AM-VSB CATV Transmission Systems," OFC/IOOC '93 Technical Digest, vol. 4, Conference Edition, Feb. 21-26, 1993, pp. 141-143.
Phillips, M. R., Darcie, T. E., Marcuse, D., Bodeep, G. E., and Frigo, N. J., "Nonlinear Distortion Generated by Dispersive Transmission of Chirped Intensity-Modulated Signals," IEEE Photonics Technology Letters, vol. 3, No. 5, May 1991, pp. 481-483.
Sakano, Shinji; Tsuchiya, Tomonobu; Suzuki, Makoto; Kitajima, Shigeki; and Chinone, Naoki, "Tunable DFB Laser with a Striped Thin-Film Heater," IEEE Photonics Technology Letters, vol. 4, No. 4, Apr., 1992, pp. 321-323.
Woodward, S. L., Koren, U., Miller, B. I., Young, M. G., Newkirk, M. A., and Burrus, C. A., "A DBR Laser Tunable by Resistive Heating," IEEE Photonics Technology Letters, vol. 4, No. 12, Dec. 1992, pp. 1330-1332.
Yariv, Amnon; Blauvelt, Hank; and Wu, Shu-Wu, "A Reduction of Interferometric Phase-to-Intensity Conversion Noise in Fiber Links by Large Index Phase Modulation of the Optical Beam," Journal of Lightwave Technology, vol. 10, No. 7, Jul. 1992, pp. 978-981.

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