0805571-A2 is referenced by 36 patents and cites 3 patents.

An optical amplifying apparatus which includes an optical amplifier, an optical attenuator and a controller. The optical amplifier amplifies a light signal having a variable number of channels. The optical attenuator passes the amplified light signal and has a variable light transmissivity. Prior to varying the number of channels in the light signal, the controller varies the light transmissivity of the optical attenuator so that a power level of the amplified light signal is maintained at an approximately constant level that depends on the number of channels in the light signal prior to the varying the number of channels. While the number of channels in the light signal is being varied, the controller maintains the light transmissivity of the optical attenuator to be constant.; Subsequent to varying the number of channels in the light signal, the controller varies the light transmissivity of the optical attenuator so that a power level of the amplified light signal is maintained at an approximately constant level that depends on the number of channels in the light signal subsequent to the varying the number of channels.

Title
Controller which controls a variable optical attentuator to control the power level of a wavelength-multiplexed optical signal when the number of channels are varied
Application Number
EP19970107189 19970430
Publication Number
0805571 (A2)
Application Date
April 30, 1997
Publication Date
November 5, 1997
Inventor
Kinoshita Susumu
JP
Sugaya Yasushi
JP
Assignee
Fujitsu
JP
IPC
H04B 10/17
H04J 14/02
H04J 14/02
H04J 14/00
H04B 10/17
H04B 10/16
H01S 03/13
H01S 03/06
G02B 06/06
H01S 03/10
H04J 14/02
H04J 14/00
H04B 10/17
H04B 10/16
H01S 03/13
H01S 03/067
H01S 03/06
G02B 06/06
H01S 03/10
View Original Source Download PDF