Electrical transmission or interconnection systems – Nonlinear reactor systems – Parametrons
Patent
1979-12-14
1981-03-10
Levy, Stewart J.
Electrical transmission or interconnection systems
Nonlinear reactor systems
Parametrons
307425, 350 9615, G02B 514, H02M 504
Patent
active
042550173
ABSTRACT:
Method for achieving phase matching for electromagnetic radiation propagating through single mode transmission media, such as, for instance, single mode optical fiber. When coherent, monochromatic radiation of essentially constant amplitude, the carrier, is propagating through such a medium, and if the frequency of the carrier is chosen to be within a region of anomalous dispersion of the medium, then, provided the medium has a finite nonlinear coefficient of the index of refraction, the carrier wave is subject to a modulational instability. This instability results in the generation and exponential growth of sidebands, the two closest to the carrrier frequency being the dominant ones. The modulation frequency is proportional to the square root of the power in the carrier wave. Apparatus for using the method is also disclosed, such as apparatus for using the method to tunably generate coherent radiation in the far infrared, apparatus for tunably generating coherent radiation relatively close to the carrier frequency, and apparatus for using the method for amplifying radiation at a frequency relatively close to the carrier frequency.
REFERENCES:
patent: 4095122 (1978-06-01), Damen et al.
K. O. Hill et al., "CW Three-Wave Mixing in Single-Mode Optical Fiber" in J. Appl. Phys., vol. 49, No. 10, Oct. 1978.
R. Stolen et al., "Phase-Matched Three Wave Mixing in Silica Fiber Optical Waveguides", in Appl. Phys. Letts., vol. 24, No. 7, Apr. 1974.
D. Knight et al., "Application of Nonlinear Devices to Optical Frequency Measurement", in Jour. of Phys. E:Sci.-Instru., 1976, pp. 898-916.
A. Mooradian, "Tunable Lasers and Applications", Proc. of Loen Conf. Norway, 1976, Springer-Verlag, Berlin, 1976, pp. 60-80.
A. Hasegawa, "Plasma Instabilities and Nonlinear Effects", Springer-Verlag, New York, Berlin (1975), pp. 201-204.
A. Hasegawa et al., Applied Physics Letts, vol. 23 pp. 142-144, Aug. 1973.
J. Flemings, Electronics Letters, vol. 14, pp. 326-328, May 1978.
J. G. Small et al., Applied Physics Letts., vol. 24, pp. 275-279, Mar. 1979.
Bell Telephone Laboratories Incorporated
Levy Stewart J.
Wilde Peter V. D.
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