05005175 is referenced by 64 patents and cites 2 patents.

This invention is a rare earth doped optical amplifier with increased gain and lowered pump thresholds. The amplifying scheme is based on a 3 level lasing system rather than the more prevalent 4 level lasing system. Additionally, the transmission mode of the optical fiber at the pump wavelength has a radius which is substantially equal to or greater than the radius of the distribution profile of the rare earth ions in the fiber amplifier core. With the inventive amplifier, a gain of 37 dB and a saturation power of 11.3 dBm has been obtained with only 54 mW of launch power at .lambda.=1.49 .mu.m.

Title
Erbium-doped fiber amplifier
Application Number
7/441495
Publication Number
5005175
Application Date
November 27, 1989
Publication Date
April 2, 1991
Inventor
John L Zyskind
Shrewsbury
NJ, US
Jay R Simpson
Fanwood
NJ, US
Clinton R Giles
Middletown
NJ, US
Emmanuel Desurvire
Middletown
NJ, US
Agent
Eli Weiss
Assignee
AT&T Bell Laboratories
NJ, US
IPC
H01S 3/00
G02B 6/00
View Original Source