Title :
Fast tunable optical filter using cascaded Mach-Zehnder Interferometers with apodized sampled gratings
Author :
Segawa, T. ; Matsuo, S. ; Ohiso, Y. ; Ishii, T. ; Shibata, Y. ; Suzuki, H.
Author_Institution :
NTT Photonics Labs., NTT Corp., Kanagawa, Japan
Abstract :
We demonstrate a novel tunable optical filter using cascaded Mach-Zehnder interferometers with apodized sampled gratings (ASGs). The ASGs are fabricated using an InGaAsP-InP deep-ridge waveguide with vertical-groove surface grating to obtain a high extinction ratio by sidelobe suppression. The proposed filter exhibits the total free-spectral range of 16 nm, an extinction ratio of 20 dB, and a 3-dB transmission bandwidth of 32 GHz.
Keywords :
Mach-Zehnder interferometers; diffraction gratings; gallium arsenide; gallium compounds; indium compounds; optical tuning; optical waveguide filters; ridge waveguides; 32 GHz; InGaAsP-InP; InGaAsP-InP deep-ridge waveguide; apodized sampled gratings; cascaded Mach-Zehnder interferometers; extinction ratio; sidelobe suppression; tunable optical filter; vertical-groove surface grating; Bandwidth; Extinction ratio; Gratings; Mach-Zehnder interferometers; Optical filters; Optical packet switching; Optical ring resonators; Optical tuning; Optical waveguides; Resonator filters; Gratings; integrated optoelectronics; optical waveguide filters; tunable filters;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2004.837473
