专利名称：Optical amplifier and method for controlling
the same
发明人：Satoshi Hamada申请号：US08/939877申请日：19970929公开号：US05923463A公开日：19990713
摘要：A wavelength within an amplifying wavelength band of an optical amplifier isintroduced into the optical amplifier at all times or when an interruption and/or reductionof a ray of input light is detected. When the interruption and/or reduction of the inputlight is detected, an output of the excited light is interrupted or reduced, an opticalswitch is controlled so that the input light is interrupted, and after the input light isrestored, a transmittivity of the optical switch is progressively increased or the input lightis passed for a constant period of protection time. Thus, when the input light has beenrestored, a light surge may be reduced without any adverse affect of a reversedistribution of the optical amplifier. In the case where the input light is abruptly raisedduring a period of moderation of the excited level, it is possible to suppress the lightsurge caused by the long service life due to the natural discharge of the excited level.
申请人：NEC CORPORATION
代理机构：Whitham, Curtis & Whitham
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