Title :
Fast-response, wide-dynamic-range optical equalisation based on silicon photonic platform
Author :
Kou, Rai ; Yamada, Koji ; Tsuchizawa, Tai ; Watanabe, Toshio ; Park, Soojin ; Nishi, Hidetaka ; Shinojima, H. ; Ishikawa, Yozo ; Wada, Kazuyoshi ; Itabashi, S.
Author_Institution :
Microsyst. Integration Labs., NTT Corp., Atsugi, Japan
Abstract :
Fast optical power equalisation using a monolithic integrated germanium photodetector and a silicon variable optical attenuator on a compact silicon photonic platform is demonstrated. With an external electronic feedback circuit, the output power of the device is stabilised within a residual deviation of 2.7 dB for 22 dB input power variation. For a surge pulse, a sudden input power increase of over 16 dB can be suppressed within 50 ns for a 3 dB recovery.
Keywords :
circuit feedback; elemental semiconductors; germanium; integrated optics; optical attenuators; photodetectors; silicon; Ge; Si; external electronic feedback circuit; monolithic integrated germanium photodetector; optical power equalisation; residual deviation; silicon photonic platform; silicon variable optical attenuator; surge pulse; wide-dynamic range optical equalisation;
Journal_Title :
Electronics Letters
DOI :
10.1049/el.2010.2759
