05239607 is referenced by 75 patents and cites 4 patents.

An apparatus and method for flattening the gain of an optical fiber amplifier (18) doped with an ion such as erbium and which is pumped by a pump laser (20). Optical couplers (32, 34) inserted before and after the fiber amplifier couple the main optical path to an optical ring passing through the fiber amplifier so as to form a ring laser. An optical isolator (32) placed in the ring causes the lasing light to only counterpropagate relative to the optical signal being amplified. When the fiber amplifier primarily exhibits inhomogeneous broadening and the ring lases, the lasing light clamps the gain to a value determined by the loop loss, and the value of the clamped gain is relatively uniform across a wide bandwidth.

Title
Optical fiber amplifier with flattened gain
Application Number
7/902955
Publication Number
5239607
Application Date
June 23, 1992
Publication Date
August 24, 1993
Inventor
Yaron Silberberg
West Windsor Township, Mercer County
NJ, US
Valeria L da Silva
Red Bank
NJ, US
Agent
Lionel N White
Leonard Charles Suchyta
Assignee
Bell Communications Research
NJ, US
IPC
G02B 6/26
H01S 3/30
View Original Source