Optical amplification device and wavelength multiplexed light tr

Details Optical amplification device and wavelength multiplexed light tr Optical amplification device and wavelength multiplexed light tr

1997-04-11

1999-08-03

Chan, Jason

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

359127, 359177, 359179, 359173, 359174, H04J 1402, H04B 1002, H04B 1016, H04B 1012

Patent

active

059332620

ABSTRACT:
Provided are an optical amplifier, for amplifying a light signal; first and second light dividers, optically connected to an output terminal of the optical amplifier; and first and second light receivers, for receiving light divided by these light dividers. A variable wavelength filter is located between the first optical coupler and the second optical couler. In addition, provided are a filter driver, for sweeping a center wavelength that passes through the variable wavelength filter; a counter circuit, for counting output peaks of the second light receiver; and an output controller, for controlling an output of the optical amplifier so as to maintain a constant output by the first light receiver. The output controller employs a voltage output by the count circuit as a reference voltage for controlling changes in the light output power of the optical amplifier that are in consonance with the value held by the counter, i.e., in consonance with the number of signal light wavelengths. When the number of multiplexed wavelengths is changed, a constant output level for one wavelength can be maintained.

REFERENCES:
patent: 5510926 (1996-04-01), Bayart et al.
patent: 5600473 (1997-02-01), Huber
patent: 5644423 (1997-07-01), Iwano
patent: 5680246 (1997-10-01), Takahashi et al.
Japanese Office Action dated Jun. 2, 1998 with English language translation of Japanese Examiner's comments.

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