Title :
Design of narrow bandwidth grating-assisted codirectional coupler filter and comparison to the experimental results
Author :
Kim, Dug-Bong ; Park, Chan-Yong ; Oh, Kwang-Ryong ; Kim, Hong-Man ; Yoon, Tae-Hoon
Author_Institution :
Optoelectronics Section, Electron. & Telecommun. Res. Inst., Daejeon, South Korea
Abstract :
A simplified analysis is very important in the design and fabrication of grating-assisted codirectional coupler (GACC) filter because extensive calculations are often required. This is mainly due to a large number of unknown parameters and a very narrow tolerance of the design and fabrication. In this paper, we present a simple method to design an InGaAsP-InP GACC filter having a very narrow bandwidth. The fabricated device has been measured to have a center wavelength of 1530.6 nm and a bandwidth of 1.5 nm. They are in agreement with calculations.
Keywords :
III-V semiconductors; diffraction gratings; gallium arsenide; gallium compounds; indium compounds; optical design techniques; optical directional couplers; optical fabrication; optical waveguide filters; 1530.6 nm; InGaAsP-InP; InGaAsP-InP GACC filter; center wavelength; grating-assisted codirectional coupler filter fabrication; narrow bandwidth grating-assisted codirectional coupler filter design; very narrow bandwidth; very narrow tolerance; Bandwidth; Electromagnetic waveguides; Fabrication; Gratings; Optical coupling; Optical filters; Optical waveguides; Propagation constant; Refractive index; Transmission line matrix methods;
Journal_Title :
Photonics Technology Letters, IEEE
