Design of low-loss tapered waveguides using the telescope structure compensation

Author

Chang, Chun-Wen ; Wu, Mount-Learn ; Hsieh, Wen-Feng

Author_Institution

Inst. of Electro-Opt. Eng., Nat. Chiao Tung Univ., Hsinchu, Taiwan

Volume

15

Issue

10

fYear

2003

Firstpage

1378

Lastpage

1380

Abstract

A low-loss tapered waveguide is achieved by telescope structure compensation. The configuration of this design is similar to the Galilean telescope based on bulk geometrical optics. We numerically calculate the transmission efficiency in the use of the beam propagation method (BPM) and the finite-difference time-domain method. The BPM simulation results reveal that the normalized transmission efficiency is more than 95%, even if the tapered angle is as large as 10/spl deg/.

Keywords

compensation; finite difference time-domain analysis; geometrical optics; optical design techniques; optical losses; optical waveguide theory; telescopes; Galilean telescope; beam propagation method; bulk geometrical optics; design configuration; finite-difference time-domain method; low-loss tapered waveguides; tapered angle; telescope structure compensation; transmission efficiency; Electrooptic devices; Finite difference methods; Lenses; Optical design; Optical devices; Optical losses; Optical propagation; Optical waveguides; Telescopes; Time domain analysis;

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/LPT.2003.818253

Filename

1232963