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US 2011/0255152 A1Published application
Optical amplifier
AssigneeNEC Corporation
InventorKatsuyuki MINO
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Abstract
An optical amplifier of the present invention includes: an optical amplifier circuit that amplifies input signal light and outputs the amplified light as output signal light; a first monitor for monitoring the presence or absence of the input signal light; and a control circuit that, when receiving a shutdown control signal, controls the optical amplifier circuit such that a shutdown control speed for reducing a level of the output signal light to zero differs according to the presence or absence of the input signal light.
Claims9
An optical amplifier, comprising:
- an optical amplifier circuit that amplifies input signal light and outputs the amplified light as output signal light;
- a first monitor for monitoring the presence or absence of the input signal light;
- and
- a control circuit that, when receiving a shutdown control signal, controls the optical amplifier circuit such that a shutdown control speed for reducing a level of the output signal light to zero differs according to the presence or absence of the input signal light.
1 more element
Dependencies are inferred from the claim text.