Optical amplification apparatus

Details Optical amplification apparatus Optical amplification apparatus

1997-07-22

2000-07-25

Hellner, Mark

Optical: systems and elements

Optical amplifier

Optical fiber

359124, H01S 300

Patent

active

060942967

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.
patent: 5675432 (1997-10-01), Kosaka
Nakabayashi et al., "Er:Doped Fiber Amplifier for WDM Transmission Using Fiber Gain Control", The Institute of Electronics Information and Communication Engineers, NEC Corp., pp. 31-36, Nov. 1994.

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