Title :
Completely adiabatic S-shaped bent tapers in optical waveguides
Author :
Wu, Mount-Learn ; Fan, Ping-Lin ; Lee, Ching-Ting
Author_Institution :
Inst. of Opt. Sci., Nat. Central Univ., Chung-Li, Taiwan
Abstract :
A novel S-shaped bent taper comprised the functions of bent and tapered structures is proposed to extend the applications of tapers with straight axes. The optimal combination of taper shape and refractive-index distribution in such an ideal structure is obtained by applying the conformal mapping technique to transform a single-mode straight waveguide into an equivalent tapered configuration. Furthermore, the beam propagation method in conjunction with the conformal mapping technique is used to analyze the optical propagation characteristics of ideal structures. Simulation results predict that a perfect mode-size conversion and a lateral shift of optical propagation can be achieved adiabatically.
Keywords :
bending; integrated optics; optical losses; optical waveguide theory; optimisation; refractive index; waveguide discontinuities; S-shaped bent taper; adiabatically; beam propagation method; bent structures; completely adiabatic S-shaped bent tapers; conformal mapping technique; equivalent tapered configuration; ideal structures; lateral shift; optical propagation; optical propagation characteristics; optical waveguides; optimal combination; perfect mode-size conversion; refractive-index distribution; simulation results; single-mode straight waveguide; tapered structures; Conformal mapping; Optical devices; Optical interconnections; Optical propagation; Optical refraction; Optical waveguide theory; Optical waveguides; Shape; Waveguide discontinuities; Waveguide transitions;
Journal_Title :
Photonics Technology Letters, IEEE
