Title :
Proposal and analysis of an ultrashort directional-coupler polarization splitter with an NLC coupling layer
Author :
Lin, Kuen-Cherng ; Chuang, Wei-Ching ; Lee, Wei-Yu
Author_Institution :
Dept. of Electr. Eng., Tatung Inst. of Technol., Taipei, Taiwan
fDate :
11/1/1996 12:00:00 AM
Abstract :
We propose a novel, high-performance directional-coupler polarization splitter using a nematic liquid crystal (NLC) as the coupling layer. The beam propagation method is used to investigate the propagation characteristics of the device under various conditions. Results of numerical calculations relevant to the design conditions are presented. Because of the large birefringence of NLC, a very short device length of 140 μm is achievable at a high extinction ratio of 28 dB
Keywords :
birefringence; finite difference methods; liquid crystal devices; nematic liquid crystals; optical directional couplers; optical polarisers; 140 mum; beam propagation method; birefringence; design conditions; device length; finite difference BPM; high extinction ratio; ion exchanged glass waveguide; nematic liquid crystal coupling layer; numerical calculation; propagation characteristics; single-mode fiber system compatibility; slab waveguides; ultrashort directional-coupler polarization splitter; Birefringence; Extinction ratio; Liquid crystal displays; Optical devices; Optical fiber polarization; Optical receivers; Optical refraction; Optical waveguides; Proposals; Tellurium;
Journal_Title :
Lightwave Technology, Journal of
