Optical phase conjugator, optical transmission system using the

Optical: systems and elements – Optical frequency converter – Dielectric optical waveguide type

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359326, 359330, 385122, G02F 139

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056942397

ABSTRACT:
An optical phase conjugator includes an optical nonlinear medium for receiving original signal light and pumping light, and generating and outputting phase-conjugate light by a nonlinear optical effect. The optical nonlinear medium contains an element which can be activated upon irradiation of activation light and has an amplification function with respect to at least the pumping light. The optical phase conjugator comprises a first optical coupler for coupling the original signal light and the pumping light and then inputting the coupled light into the medium, and a second optical coupler for inputting the activation light into the medium. An improvement in phase-conjugate light generating efficiency is attained, and phase-conjugate light having a sufficiently high intensity can be obtained by the optical phase conjugator with a simple, compact arrangement.

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patent: 5550671 (1996-08-01), Simpson et al.
Watanabe et al: "Compensation of Chromatic Dispersion in a Single-Mode Fiber by Optical Phase Conjugation", IEEE Photonics Technology, vol. 5, No. 1, Jan. 1993, pp. 92-95.
Kiuchi, et al: "Compensation for Pulse Waveform Distortion in Ultra-Long Distance Optical Communication Systems by using Midway Optical Phase Conjugator", IEEE Photonics Letters, vol. 6, No. 1, Jan. 1994, pp. 104-105 .

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