Title :
SSFLC optical directional coupler switch with a short device length: a proposal
Author :
Lee, Wei Yu ; Lin, Jin Shin ; Lee, Kun-Yi ; Chuang, Wei-Ching
Author_Institution :
Dept. of Electr. Eng., Tatung Inst. of Technol., Taipei, Taiwan
fDate :
11/1/1995 12:00:00 AM
Abstract :
A novel vertical directional coupler waveguide switch composed of ferroelectric liquid crystal (FLC) is proposed and analyzed. The surface stabilized ferroelectric liquid crystal break (SSFLC) is used as an active separation layer between passive waveguides. To decrease the switching length, the waveguide switch is based on the power crossing the separation layer rather than coupling between waveguides. The calculated results relevant to the switch parameters such as the switching length, switching time, capacitance, and extinction ratio are presented. Because of the large birefringence of FLC, a very short switching length, less than 60 μm, is possible
Keywords :
birefringence; electro-optical switches; ferroelectric devices; ferroelectric liquid crystals; ferroelectric switching; liquid crystal devices; optical bistability; optical directional couplers; 60 mum; SSFLC optical directional coupler switch; active separation layer; capacitance; coupling; extinction ratio; large birefringence; passive waveguides; power; separation layer; short device length; surface stabilized ferroelectric liquid crystal break; switching length; switching time; vertical directional coupler waveguide switch; very short switching length; waveguide switch; Capacitance; Directional couplers; Ferroelectric materials; Liquid crystals; Liquid waveguides; Optical devices; Optical surface waves; Optical switches; Optical waveguides; Surface waves;
Journal_Title :
Lightwave Technology, Journal of
