Title :
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
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;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2003.818253
