Optical: systems and elements – Optical amplifier – Optical fiber
Patent
1996-03-27
1997-06-17
Hellner, Mark
Optical: systems and elements
Optical amplifier
Optical fiber
372 6, H01S 300
Patent
active
056402694
ABSTRACT:
An optical fiber amplifier comprises a composite optical fiber for receiving signal light and excitation light, amplifying the signal light and emitting the amplified signal light, comprising at least two kinds of optical fibers serially coupled each having a glass composition selected from at least two kinds of rare-earth-doped glass compositions, and excitation means for generating excitation light and supplying it to the composite optical fiber. Then, an optical fiber amplifier which reduces the wavelength dependency of gain in various wavelength ranges in wavelength division multiplexing transmission or in optical analog transmission, and which maintains an energy efficiency for amplification, an optical fiber amplifier which makes a wavelength at a gain peak to a predetermined one in accordance with intensities of various input lights, and an optical amplifier repeater comprising this optical fiber amplifier are provided.
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Kashiwada Tomonori
Nakazato Koji
Nishimura Masayuki
Shigematsu Masayuki
Hellner Mark
Sumitomo Electric Industries Inc.
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