Title :
Wideband planar lightwave circuit type variable optical attenuator using phase-generating coupler
Author :
Mizuno, T. ; Hashizume, Y. ; Yanagisawa, M. ; Kitoh, T. ; Kaneko, A. ; Takahashi, H.
Author_Institution :
NTT Photonics Labs., NTT Corp., Atsugi, Japan
fDate :
5/25/2006 12:00:00 AM
Abstract :
A novel wideband planar lightwave circuit type variable optical attenuator (VOA) that incorporates a phase-generating coupler is proposed. The proposed VOA was fabricated on a 1.5%-/spl Delta/ silica-based waveguide, and obtained a low insertion loss of less than 1.2 dB and a low wavelength dependent loss of less than 0.8 dB at attenuation levels of 0 to 25 dB over the C- and L-band wavelength range.
Keywords :
optical attenuators; optical couplers; optical planar waveguides; waveguide attenuators; C-band wavelength range; L-band wavelength range; insertion loss; phase-generating coupler; silica-based waveguide; variable optical attenuator; wavelength dependent loss; wideband planar lightwave circuit type;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:20060364
