Title :
A widely tunable optical filter using ladder-type structure
Author :
Matsuo, S. ; Yoshikuni, Y. ; Segawa, T. ; Ohiso, Y. ; Okamoto, H.
Author_Institution :
NTT Photonics Labs., Kanagawa, Japan
Abstract :
A novel widely tunable optical filter with a ladder-type structure is proposed. The device decreases the electrode area, compared with a tunable filter using an arrayed waveguide grating filter. It is fabricated using the InGaAsP-InP material system, and current injection is employed to change the refractive index of the waveguide. The device exhibits a tuning range of 58 nm and a switching time of less than 10 ns.
Keywords :
III-V semiconductors; diffraction gratings; electrodes; gallium arsenide; gallium compounds; indium compounds; optical switches; optical tuning; optical waveguide filters; refractive index; 10 ns; InGaAsP-InP; InGaAsP-InP material system; WDM; arrayed waveguide grating filter; current injection; electrode area; ladder-type structure; refractive index; switching time; tuning range; wavelength-division multiplexing; widely tunable optical filter; Arrayed waveguide gratings; Couplings; Electrodes; Optical filters; Optical refraction; Optical tuning; Optical variables control; Optical waveguides; Semiconductor waveguides; Wavelength division multiplexing;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2003.815354
