Modal Behavior of Photonic Crystal Tapers for Improved Coupling Toward Cleaved-Facet Single-Mode Fiber

Author

Lee, Ko-Hsin ; Guilet, Stephane ; Merghem, Kamel ; Sagnes, Isabelle ; Talneau, Anne

Author_Institution

Lab. for Photonics & Nanostruct. (LPN), Marcoussis, France

Volume

27

Issue

22

fYear

2009

Firstpage

5168

Lastpage

5172

Abstract

We report simulation and experiment results of modal behaviors of photonic crystal (PhC) tapers on InP-based materials designed to improve coupling efficiency of the PhC waveguide mode into a cleaved-facet single-mode fiber. The modal distributions of transmitted power are simulated by two-dimensional finite difference time domain (2D-FDTD) calculation and the measured far-field patterns are in agreement with these calculations. The 34.4 mum-long PhC taper with Gaussian curve geometry is demonstrated to have an enhancement of coupling efficiency by a factor of four compared to the direct coupling from a W3 PhC defect waveguide.

Keywords

finite difference time-domain analysis; holey fibres; integrated optics; optical waveguides; photonic crystals; 2D finite difference time domain calculation; Gaussian curve; InP; cleaved facet single mode fiber; far field pattern; photonic crystal taper modal behavior; size 34.4 mum; Integrated optics; mode converter; photonic crystal; taper waveguide;

fLanguage

English

Journal_Title

Lightwave Technology, Journal of

Publisher

ieee

ISSN

0733-8724

Type

jour

DOI

10.1109/JLT.2009.2030696

Filename

5210192