Title :
The design of mode evolution couplers
Author :
Syahriar, Ary ; Schneider, Vitor Marino ; Al-Bader, S.
Author_Institution :
Dept. of Electr. Eng., Imperial Coll. of Sci., Technol. & Med., London, UK
fDate :
10/1/1998 12:00:00 AM
Abstract :
The design of an optical switch based on a directional coupler with tapered velocity and tapered coupling is investigated. The physical principle is based on power transfer by the evolution of a single normal mode. We consider cases where the coupling coefficient and guide mismatch variation are determined by optimized shape functions related to rectangle, raised cosine, Hamming, and Blackman window functions. Following simplified analysis by coupled mode theory, the physical parameters of the device are determined and the predicted performance is verified by the method of lines. Significant improvement in sidelobe levels and coupling length ran be obtained by careful design
Keywords :
coupled mode analysis; optical design techniques; optical directional couplers; optical switches; optical waveguide theory; Blackman window functions; Hamming window functions; coupling coefficient; coupling length; guide mismatch variation; method of lines; mode evolution couplers; optical directional coupler; optical switch design; optimized shape functions; physical principle; power transfer; raised cosine window functions; rectangular window functions; sidelobe levels; single normal mode; tapered coupling; tapered velocity; Coupled mode analysis; Directional couplers; Helium; Integrated optics; Optical coupling; Optical design; Optical switches; Performance analysis; Propagation constant; Shape;
Journal_Title :
Lightwave Technology, Journal of
