Optical: systems and elements – Optical amplifier – Optical fiber
Patent
1996-05-31
1997-12-23
Hellner, Mark
Optical: systems and elements
Optical amplifier
Optical fiber
359161, 359177, H01S 300
Patent
active
057011958
ABSTRACT:
In a light signal reception apparatus having a light surge eliminating function and provided in an optical transmission system, the apparatus of the present invention can effectively eliminate a light surge accidentally included in a light signal. The apparatus includes: an optical amplifying unit for receiving a light signal and amplifying it to a predetermined level; an optical filtering unit operatively connected to the optical amplifying unit for eliminating the light surge and passing through the light signal; an opto-electrical converting unit operatively connected to the optical filtering unit for converting the light signal to an electrical signal; and a monitoring unit operatively connected to the optical amplifying unit for monitoring a fluctuation of the light signal, and controlling a transmission wavelength characteristic of the optical filtering unit or a wavelength of the light signal in order to eliminate the light surge.
REFERENCES:
patent: 5317660 (1994-05-01), Vieth
patent: 5436760 (1995-07-01), Nakabayashi
patent: 5504608 (1996-04-01), Neeves et al.
patent: 5552919 (1996-09-01), Majima et al.
Fujitsu Limited
Hellner Mark
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