Title :
An apodized sampled grating using a vertical-groove high-mesa waveguide structure
Author :
Segawa, T. ; Matsuo, S. ; Ohiso, Y. ; Ishii, T.
Author_Institution :
NTT Photonics Laboratories, NTT Corp., Kanagawa, Japan
fDate :
31 May-4 June 2004
Abstract :
We propose a fast tunable optical filter using an apodized sampled grating (ASG). A sampled grating (SG) structure that exhibits a comb-like filter response is introduced to obtain both a wide tuning range and easy control of transmission bandwidth. In addition, we apply apodization to the SG to achieve a high extinction ratio by suppressing the sidelobe of filter spectra. We fabricated an ASG using an InGaAsP/InP vertical-groove high-mesa waveguide structure for use in a tunable optical filter. The fabricated grating exhibited a comb-like filter response with a relatively wide transmission bandwidth of 52 GHz and a high extinction ratio of 15 dB.
Keywords :
III-V semiconductors; arsenic compounds; diffraction gratings; gallium arsenide; gallium compounds; indium compounds; optical fabrication; optical filters; optical tuning; optical waveguides; 15 dB; 52 GHz; InGaAsP-InP; apodized sampled grating; comb-like filter; extinction ratio; filter spectra; tunable optical filter; vertical-groove high-mesa waveguide structure; Arrayed waveguide gratings; Bandwidth; Extinction ratio; Indium phosphide; Optical crosstalk; Optical filters; Optical ring resonators; Optical tuning; Optical waveguides; Refractive index;
Conference_Titel :
Indium Phosphide and Related Materials, 2004. 16th IPRM. 2004 International Conference on
Print_ISBN :
0-7803-8595-0
DOI :
10.1109/ICIPRM.2004.1442764
