Title :
Design of wavelength-flattened coupler using a novel diagram
Author :
Emori, Yoshihiro ; Mizumoto, Tetsuya ; Naito, Yoshiyuki
Author_Institution :
Dept. of Phys. Electron., Tokyo Inst. of Technol., Japan
fDate :
12/1/1996 12:00:00 AM
Abstract :
A novel diagram which describes the condition of 3 dB coupler is proposed. Using the proposed diagram, the design of a wavelength-flattened 3 dB directional coupler composed of a uniform coupled waveguide is investigated. Normalized waveguide parameters are introduced to characterize a five-layer planar waveguide. This enables us to generalize the discussion and to reduce the number of parameters required for characterizing a coupled waveguide. A broadband 3 dB coupler having 50±5% coupling ratio over a wavelength range of 1.1-1.7 μm is designed
Keywords :
optical couplers; optical design techniques; optical directional couplers; optical waveguide theory; 1.1 to 1.7 mum; 3 dB coupler; broadband 3 dB coupler; coupled waveguide; coupling ratio; directional coupler; five-layer planar waveguide; normalized waveguide parameters; uniform coupled waveguide; wavelength range; wavelength-flattened coupler design; Coupling circuits; Directional couplers; Electromagnetic waveguides; Integrated optics; Optical coupling; Optical devices; Optical filters; Optical refraction; Optical variables control; Optical waveguides;
Journal_Title :
Lightwave Technology, Journal of
