Optical: systems and elements – Optical amplifier – Optical fiber
Patent
1997-06-19
1999-02-02
Hellner, Mark
Optical: systems and elements
Optical amplifier
Optical fiber
H01S 300
Patent
active
058673067
ABSTRACT:
An efficient, wavelength independent, small optical amplifier includes an optical transmitter, a signal light inputter supplying light to the optical transmitter, an amplified light fiber connected to the optical transmitter, an excitation source supplying pump light to the light amplified fiber, an optical filter connected between the light amplified fiber and the excitation source for reflecting the signal light and transmitting the pump light, and an outputter for outputting the amplified signal light. The amplifier may also include another light amplified fiber connected to the optical transmitter, another excitation source, and another optical filter for further amplifying the signal light amplified by the light amplified fiber. The wavelengths output by the excitation sources may differ to provide more efficient amplification. The signal light may include different wavelengths, resulting in a wavelength dependency of gain for the amplifier. In order to compensate for this wavelength dependency, the material, the length, the dopant level, and/or the core diameter used for the light amplified fibers may differ, again the wavelength of the excitation sources may differ, and the optical filters may only pass different certain wavelengths. Portions fed by the respective terminal may be integrated to reduce the number of elements and size of the amplifier.
REFERENCES:
patent: 5181264 (1993-01-01), Chiaretti et al.
patent: 5557442 (1996-09-01), Huber
patent: 5598294 (1997-01-01), Uno et al.
patent: 5623362 (1997-04-01), Mitsuda et al.
Tkach, "Gain-flattened optical-fiber amplifiers with a hybrid er-doped-fiber configuration for WDM transmission," Technical Digest OFC '95, pp. 77-78.
Koji, et al, English-language abstract of Japanese laid-open application JP-A-7-226560.
Makoto, et al, English-language abstract of Japanese laid-open application JP-A-7-211980.
Tadashi, et al, English-language abstract of Japanese laid-open application JP-A-6-324368.
Kashiwada, et al, "Study on optical fiber amplifier for WDM transmission system employing hybrid EDF configuration," 1995.
Takano, et al "An optical Pre-Amplifier with Automatic Gain Control Function," 1995.
"Optical amplifier and its application".
Hellner Mark
Mitsubishi Denki & Kabushiki Kaisha
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