Title :
Extinction ratio improvement by an advanced NOLM setup
Author :
Striegler, Arne G. ; Schmauss, Bernhard
Author_Institution :
ADVAoptical, Germany
fDate :
5/1/2006 12:00:00 AM
Abstract :
We present a nonlinear optical loop mirror (NOLM)-based setup which is optimized for regeneration of signals with a poor extinction ratio caused by, e.g., high powered ghost pulses. In a conventional NOLM, the improvement of the extinction ratio is limited by the input extinction ratio or insufficient amplitude jitter reduction. These limitations can be overcome by an additional directional phase shifter. According to numerical simulation, the extinction ratio can be improved from 6 dB up to several 10 dB.
Keywords :
mirrors; nonlinear optics; optical attenuators; optical fibre couplers; optical phase shifters; optical repeaters; NOLM; amplitude jitter; directional phase shifter; extinction ratio; nonlinear optical loop mirror; signal regeneration; Extinction ratio; Fiber nonlinear optics; Jitter; Mirrors; Nonlinear optics; Optical attenuators; Optical fiber polarization; Optical pulses; Phase shifters; Repeaters; All-optical regeneration; extinction ratio; nonlinear optical loop mirror (NOLM);
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2006.873493
