05822112 is referenced by 12 patents and cites 19 patents.

A control apparatus for an optical amplifier such as an erbium-doped optical-fiber (EDF) amplifier suppresses overshooting of ALC control at power on and at the time of input light restoration from an off condition, while ensuring quick starting. At power on and at the time of input light restoration from an off condition, an idling current (IDC) reference value generating circuit generates an IDC reference voltage that increases to a value sufficiently greater than a value in a normal operating condition with a time constant corresponding to a rise time of the EDF, and thereby controls a laser diode for pumping the EDF. The voltage may be set to a value larger than the value in the normal operating condition for a predetermined period of time by using a timer.

Title
Control apparatus for optical amplifier
Application Number
8/630074
Publication Number
5822112
Application Date
April 15, 1996
Publication Date
October 13, 1998
Inventor
Yuji Tamura
Sapporo
JP
Yoshihito Onoda
Kawasaki
JP
Michikazu Shima
Kawasaki
JP
Hiroyuki Itou
Sapporo
JP
Agent
Helfgott & Karas P C
Assignee
Fujitsu
JP
IPC
H01S 3/131
H04B 10/12
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