Optical amplifiers

Details Optical amplifiers Optical amplifiers

1985-12-11

1988-04-26

LaRoche, Eugene R.

Coherent light generators

Raman laser

330 43, H01S 330

Patent

active

047409746

ABSTRACT:
An optical signal pulse to be amplified and a pump signal pulse are launched consecutively into one end of an optical fiber, which may comprise a separate fibre or part of a transmission line. The pulses differ in wavelength by one or more Stokes shift and the order of launch is determined by the relative group velocities in the fibre. Owing to dispersion in the fibre the pulses overlap and overtake one another while they are transmitted along the fibre, the signal pulse being amplified as a result of Raman stimulated emission and compressed as a result of power depletion from the pump pulse, thus increasing the bandwidth of the transmission line.

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Stappaerts et al., "Garn Enhancement in Raman Amplifiers with Broadband Pumping", Optics Letters, vol. 5, No. 1, Jan. 1980, pp. 4-6.
Byron, "Raman Amplification . . . 1.36 .mu.m", Proceedings of 1984 European Conference on Optics, Optical Systems and Application, paper L5.
Byron, "Simultaneous amplification . . . fibre", Electronics Letters, vol. 22, No. 24, pp. 1275-1277, Nov. 1986.
Edagawa et al., "Simultaneous amplification . . . semiconductor lasers", Electronics Letters, vol. 23, No. 5, Feb. 1987.
M. Nakazawa et al., "Active Transmission line: Light Amplification by Backword-Stimulated Raman Scattering in Polarization-Maintaining Optical Fibre", J. Opt. Soc. Am. B, vol. 1, No. 1, Mar. 1984, pp. 80-85.

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