Intra-cavity optical four-wave mixer and optical communications

Details Intra-cavity optical four-wave mixer and optical communications Intra-cavity optical four-wave mixer and optical communications

1995-03-02

1996-08-27

Hellner, Mark

Optical: systems and elements

Optical amplifier

Correction of deleterious effects

359326, 359328, 385122, H01S 300, G02F 135

Patent

active

055506712

ABSTRACT:
In accordance with the invention, an optical four-wave mixer for producing a phase-conjugated signal comprises a source of optical input signals, a fiber laser for receiving the signals, and a detector for selectively detecting the frequency-shifted signals produced by four-wave mixing. The laser can be a rare-earth doped fiber laser with a fiber cavity phase matched to the input signals. The frequency-shifted output signals have an inverted spectral waveform as compared with the input signals. The mixer can be made in compact form with a cavity length as small as 100 m and can provide inverted signals at the same intensity as the input signals, making the mixer particularly useful for providing spectral inversion in an optical communications system.

REFERENCES:
patent: 5243610 (1993-09-01), Murata
patent: 5386314 (1995-01-01), Jopson
K. Inoue et al. "Wavelength Conversion Experiment Using Fiber Four-Wave Mixing," IEEE Photonics Tech. Lett., vol. 4, pp. 69-72, (1992).
S. Watanabe et al. "Compensation of Chromatic Dispersion in a Single-mode Fiber by Optical Phase Conjugation," Photonics Tech. Lett., 5, pp. 91-95, (1993).
P. Andrekson et al. "16 Gbit/s All-Optical Demultiplexing Using Four-Wave Mixing,"Elect. Lett., vol. 27, pp. 922-924 (1991).
R. M. Jopson et al. "Polarisation-independent Phase Conjugation of Lightwave Signals," Elect. Lett., vol. 29, No. 25, pp. 2216-2217 (1994).
K. Kikuchi et al. "Design of Highly Efficient Four-Wave Mixing Devices Using Optical Fibers," IEEE Photonics Tech. Lett., vol. 6, No. 8, pp. 992-994 (1994).
H. Po et al. "High Power Neodymium-Doped Single Transverse Mode Fibre Laser," Elect. Lett., 29, pp. 1500-1501, (1993).

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