Optical: systems and elements – Optical amplifier – Optical fiber
Patent
1994-12-27
1997-02-04
Moskowitz, Nelson
Optical: systems and elements
Optical amplifier
Optical fiber
359124, 359134, 359337, H04B 1016, H01S 3131, G02F 139
Patent
active
056004818
ABSTRACT:
A rare earth-doped optical fiber is supplied with a input signal light and an excitation light, so that the input signal light is amplified to be supplied to an output as an amplified signal light. At this time, an intensity of an amplification of spontaneous emission (ASE) is detected to be compared with a predetermined intensity, thereby to provide a difference signal. An amount of the excitation light is controlled by the difference signal to equalize the ASE to the predetermined intensity.
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patent: 5510926 (1996-04-01), Bayart et al.
Non-repeated Transmission Experiment At 1.8 Gb/s Using LD Pumped Er3+ Doped Fiber Amplifiers in an IM/Direct-Detection Repeater System, K. Hagimoto etc. (PD15 1-4 of "OFC '89, PD-1, Jan. 1989").
Pp. 75-82 of "O Plus E, 113, Apr. 1989 By Shimada".
Trunk and Distribution Network Application of Erbium-Doped Fiber Amplifier, pp. 198-208 of IEEE, Journal of Lightwave Technology, vol. 9, No. 2, Feb. 1991, Nakagawa, et al.
A 100-Channel Optical FDM Six-Stage In-Line amplifier System Employing Tunable Gain Equalizers, pp. 248-251 of IEEE, Photonixs Tech. Lett. vol. 5, No. 2, Feb. 1993, by Tob.
Using Equalizers to Offset the Deterioration in SCM Video Transmission due to Fiber Dispersion and EDFA Gain Tilt, pp. 4-98 of "B-705" in the Institutes of electronics Information and Communications Engineerings, 1992 by Koji Kikushima.
Amplification of Spontaneous Emission in Eribium-Doped Single-Mode Fibers, pp. 835-845 of IEEE Journal of Lightwave Technology, vol. 7, No. 5, May 1989 by Desurvire and Simpson.
Moskowitz Nelson
NEC Corporation
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