Title :
Feedback controlled variable optical attenuator for channel power regulation in WDM systems
Author :
Jin, Yong-Sung ; Lee, Sang-Shin ; Son, Yung-Sung
Author_Institution :
Devices & Mater. Lab., LG Corp. Inst. of Technol., Seoul, South Korea
fDate :
5/27/1999 12:00:00 AM
Abstract :
A variable optical attenuator is described which uses an asymmetric polymeric Y-branch waveguide. It incorporates an optical monitoring tap to regulate the optical output regardless of variations in input light power and polarisation. The dynamic attenuation range was >18 dB at 1.55 μm. The attenuator was successfully used to regulate channel powers within 0.5 dB in a WDM system.
Keywords :
waveguide attenuators; 1.55 micrometre; WDM systems; asymmetric polymeric Y-branch waveguide; channel power regulation; channel powers; dynamic attenuation range; feedback controlled variable optical attenuator; input light polarisation; input light power; optical monitoring tap; optical output;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19990619
