Optical: systems and elements – Deflection using a moving element – Using a periodically moving element
Patent
1995-03-02
1996-10-15
Boudreau, Leo
Optical: systems and elements
Deflection using a moving element
Using a periodically moving element
359161, H04B 1004
Patent
active
055663818
ABSTRACT:
Spectral broadening over a large range using PM is achieved by a lightwave source without the need for a large phase modulation index and without expending a large amount of modulator RF drive power. In this lightwave source, a laser output signal is externally phase modulated by one or more modulation signals. The phase modulation employs one or more frequency drive signals (i.e., the modulation signals) each of whose amplitude is judiciously selected to produce an output spectrum having substantially equal spectral components over a predetermined range of frequencies. The predetermined frequency range is centered about the source frequency for the laser and resembles a comb. Each frequency drive signal is also selected to have a frequency (or frequency spacing from other drive signals) so that adjacent spectral components in the output spectrum of the modulated signal are produced with a frequency spacing which exceeds the SBS interaction bandwidth at the transmission wavelength of interest.
REFERENCES:
patent: 5166821 (1992-11-01), Huber
patent: 5303079 (1994-04-01), Gnauck et al.
patent: 5329396 (1994-07-01), Fishman et al.
patent: 5420868 (1995-05-01), Chraplyvy et al.
"Investigation of Rayleigh Wings and Brillouin-Stimulated Scattering in Liquids", M. Denariez & G. Bret, Physical Review, vol. 171, No. 1, Jul. 5, 1968, pp. 160-171.
"Optical Power Handling Capacity of Low Loss Optical Fibers as Determined by Stimulated Raman and Brillouin Scattering", R. G. Smith, Applied Optics, vol. 11, No. 11, Nov. 1972, pp. 2489-2494.
"Stimulated Brillouin Scattering in Monomode Optical Fiber", D. Cotter, Journal of Optical Communications, vol. 4, Mar. 1983, pp. 10-19.
"Suppression of Stimulated Brillouin Backscattering by PSK Modulation for High-Power Optical Transmission", A. Hadjifotiou & G. A. Hill, IEE Proceedings, vol. 133, pt. J, No. 4, Aug. 1986.
"Ti:LiNbO3 Integrated Optical Technology", S. K. Korotky & R. C. Alferness, Integrated Optical Circuits and Components Design and Applications, edited by L. D. Hutcheson, Marcel Dekker, Inc., pp. 169-226.
"Waveguide Electrooptic Devices for Optical Fiber Communication", S. K. Korotky & R. C. Alferness, Optical Fiber Telecommunications II, edited by S. E. Miller & I. P. Kaminow, Academic Press, Inc., pp. 421-465.
"Suppression of Brillouin Scattering in Lightwave AM-VSB CATV Transmission Systems", X. P. Mao et al., OFC/IOOC'93 Technical Digest, pp. 141-143.
Williams et al., "Simultaneous Suppresion of Stimulated Brillouin Scattering and Interferometric Noise in Externally Modulated Light Wave AM-SCM Systems", IEEE Photonics Technology Letters, vol. 6, No. 12, Dec. 1994, pp. 1476-1478.
Boudreau Leo
Dinicola Brian K.
Lucent Technologies - Inc.
Negash Kinfe-Michael
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