Title :
A high-efficiency in-plane splitting coupler for planar photonic Crystal self-collimation devices
Author :
Miao, Binglin ; Chen, Caihua ; Shi, Shouyuan ; Prather, Dennis W.
Author_Institution :
Dept. of Electr. & Comput. Eng., Univ. of Delaware, Newark, DE, USA
Abstract :
In this letter, we present the design, fabrication, and characterization of a high-efficiency in-plane splitting coupler for planar photonic crystal self-collimation devices. This splitting coupler consists of multiple concatenated in-plane reflective lenses and is capable of efficiently splitting and coupling a wide input beam into multiple narrow self-collimated beams. As an example, a one-to-two splitting coupler is simulated using the two-dimensional finite-difference time-domain method with an effective index used to account for the third dimension. The simulation shows a total coupling efficiency of 86% and a splitting ratio of two channels is 0.51 to 0.49. This device is also experimentally validated and the measured splitting ratio is 0.57 to 0.43.
Keywords :
finite difference time-domain analysis; integrated optics; lenses; optical beam splitters; optical collimators; optical couplers; optical design techniques; optical fabrication; photonic crystals; 86 percent; coupler characterization; coupler design; coupler fabrication; high-efficiency coupler; in-plane reflective lenses; in-plane splitting coupler; multiple concatenated lenses; multiple narrow beams; one-to-two splitting coupler; planar photonic crystal devices; self-collimated beams; self-collimation devices; two-dimensional finite difference time-domain method; Concatenated codes; Coupling circuits; Fabrication; Finite difference methods; Lenses; Optical control; Optical coupling; Photonic crystals; Silicon on insulator technology; Time domain analysis; Parabolic lens; photonic crystal (PhC); self-collimation; silicon-on-insulator (SOI); splitting coupler;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2004.838138
