Title :
Optical wavelength filter with tapered couplers
Author :
Huang, W.-P. ; Little, B.E. ; Chadhuri, S.K.
Author_Institution :
Dept. of Electr. & Comput. Eng., Waterloo Univ., Ont., Canada
Abstract :
Optical wavelength filters based on tapered directional couplers are analyzed by nonorthogonal coupled-mode theory. The nonorthogonal coupled-mode formulation in general yields more accurate results than the conventional orthogonal coupled-mode theory. The focus is on the novel features of the tapered couplers used as wavelength filters. It is demonstrated that, in addition to reducing the crosstalk and suppressing the sidelobes, the tapered structure can also make the filtering response independent of the device length beyond a critical coupling length,.<>
Keywords :
directional couplers; integrated optics; optical couplers; optical filters; optical waveguide components; critical coupling length; crosstalk; device length; filtering response; nonorthogonal coupled-mode theory; optical wavelength filter; sidelobes; tapered directional couplers; Electrons; Filtering theory; Optical crosstalk; Optical fiber couplers; Optical filters; Optical waveguides; Optimized production technology; Thermal stability; Waveguide components; Wavelength division multiplexing;
Journal_Title :
Photonics Technology Letters, IEEE
