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

Volume

16

Issue

10

fYear

2004

Firstpage

2251

Lastpage

2253

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;

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/LPT.2004.833956

Filename

1336893