Title :
A novel wavelength-division multiplexer using grating-assisted two-mode interference
Author :
Tzong-Yow Tsai ; Zhi-Cheng Lee ; Chi-Shiun Gau ; Fu-Shing Chen ; Jong-Rong Chen ; Chi-Chung Chen
Author_Institution :
Dept. of Electr. Eng., Nat. Cheng Kung Univ., Tainan, Taiwan
Abstract :
A novel design of wavelength-division multiplexer based on two-mode interference assisted by a highly dispersive grating structure is two-dimensionally simulated and analyzed using finite-difference time-domain method. We show that the designed grating waveguide provides a mode-dependent reflection spectrum which can be used to modify the beat lengths of the two selected wavelengths 1342 and 1560 nm, so that they can be divided in a very short distance about 48 μm. Simulation results show that contrasts /spl sim/12 dB and insertion losses about 2 dB could be achieved.
Keywords :
diffraction gratings; finite difference time-domain analysis; optical communication equipment; optical design techniques; optical losses; wavelength division multiplexing; 1342 to 1560 nm; dispersive grating; finite-difference time-domain method; grating waveguide; insertion losses; optical grating; reflection spectrum; two-mode interference; wavelength-division multiplexer; Analytical models; Arrayed waveguide gratings; Dispersion; Finite difference methods; Interference; Optical losses; Optical waveguides; Reflection; Time domain analysis; Wavelength division multiplexing;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2004.833956
