Optical: systems and elements – Optical amplifier – Optical fiber
Patent
1996-04-03
1997-10-07
Hellner, Mark
Optical: systems and elements
Optical amplifier
Optical fiber
359176, 359177, H01S 300
Patent
active
056754329
ABSTRACT:
An optical amplification apparatus for adjusting optical power of wavelength-multiplexed signal light at respective wavelengths and for adjusting the optical output power at the respective wavelengths and a deviation of the optical output power between the wavelengths. An optical power adjusting unit for receiving inputted light having signal light at a plurality of different wavelengths (.lambda..sub.1, .lambda..sub.2, .lambda..sub.3, . . . , .lambda..sub.N) multiplexed thereon, amplifying or attenuating light at least one wavelength included in the received light independently of light at different wavelengths from the wavelength of the light, is provided before or after an optical amplifier unit for amplifying the light having the signal light at the plurality of different wavelengths multiplexed thereon. Further, a control unit is provided for controlling the gain of amplification or attenuation performed by the optical power adjusting unit and the gain of amplification performed by the optical amplifier unit, respectively.
REFERENCES:
patent: 5392154 (1995-02-01), Chang et al.
patent: 5452116 (1995-09-01), Kirkby et al.
Hellner Mark
Hitachi , Ltd.
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