Novel Ultracompact Triplexer Based on Photonic Crystal Waveguides

Author

Shi, Yaocheng ; Dai, Daoxin ; He, Sailing

Author_Institution

Centre for Opt. & Electromagn. Res., Zhejiang Univ., Hangzhou

Volume

18

Issue

21

fYear

2006

Firstpage

2293

Lastpage

2295

Abstract

Two stages of directional couplers based on photonic crystal waveguides are cascaded to form an ultracompact triplexer. The directional couplers are decoupled at the wavelength of 1310 nm. The length of the coupling region in the first directional coupler is chosen to separate the other two wavelengths (i.e., 1490 and 1550 nm), and the coupling region is tapered to improve the extinction ratios. The second directional coupler separates the wavelengths of 1490 and 1310 nm. For the channel of 1550 nm, an additional directional coupler is used to reduce the crosstalk from the channels of 1490 and 1310 nm. The total size of the present triplexer is only 50 mumtimes20 mum, and the good performance is verified with finite-difference time-domain simulation

Keywords

demultiplexing equipment; finite difference time-domain analysis; optical communication equipment; optical directional couplers; optical fibre subscriber loops; optical waveguides; photonic crystals; telecommunication channels; 1310 nm; 1490 nm; 20 mum; 50 mum; crosstalk; directional couplers; extinction ratio; finite-difference time-domain simulation; photonic crystal waveguides; triplexer; Crosstalk; Dielectrics; Directional couplers; Electromagnetic waveguides; Extinction ratio; Helium; Instruments; Optical filters; Optical waveguides; Photonic crystals; Directional coupler; photonic crystal (PC); triplexer; waveguide;

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/LPT.2006.884722

Filename

1715405