Optical: systems and elements – Optical amplifier – Optical fiber
Patent
1997-11-13
1999-08-10
Moskowitz, Nelson
Optical: systems and elements
Optical amplifier
Optical fiber
359134, 359160, G02B 628, H01S 330
Patent
active
059367636
ABSTRACT:
The optical fiber amplifier of this invention includes plural pump light sources for emitting pump light; a first wavelength multiplexer for receiving the pump light emitted by the pump light sources at plural input ports and wavelength multiplexing the received pump light, so as to generate wavelength multiplexed pump light and output the wavelength multiplexed pump light from an output port; a second wavelength multiplexer for receiving the wavelength multiplexed pump light at a first input port and receiving signal light at a second input port, so as to generate coupled light by coupling the wavelength multiplexed pump light and the signal light and emit the coupled light from an output port; and a rare earth-doped optical fiber for receiving the coupled light emitted from the output port of the second wavelength multiplexer and amplifying the coupled light. At least one of the pump light sources is a narrow-linewidth light source for emitting light with a laser linewidth of approximately 5 nm or less as the pump light.
REFERENCES:
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patent: 5249189 (1993-09-01), Sheps
patent: 5287216 (1994-02-01), Chirravuri et al.
patent: 5500764 (1996-03-01), Armitage et al.
patent: 5623362 (1997-04-01), Mitsuda et al.
Metschke et al, Applied Physics B, vol. B62, #4, pp. 375-379; Abstract Only Herewith, Apr. 1996.
Fujihara Kiyoshi
Mitsuda Masahiro
Uno Tomoaki
Matsushita Electric - Industrial Co., Ltd.
Moskowitz Nelson
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