Title :
Phase shifted photonic crystal based filter with flat-top response
Author :
Dasgupta, Shounak ; Bose, Chyanika
Author_Institution :
ECE Dept., MCKV Inst. of Eng., Howrah, India
Abstract :
In this paper, design of a phase shifted 1D photonic crystal filter with nearly squared flat top spectral characteristics is reported. Estimated phase shifts are incorporated into the structure through proper extension in dielectric layers of specific unit cells. Performance of the flat top filter is analyzed using transfer matrix method. The flat top pass band characteristics of such filter is tailored to support shifts of signal wavelength in an allotted channel within its tolerance limit, which is specified as 14 nm by ITU-T Recommendation G.694.2 in case of a coarse wavelength division multiplexing (CWDM) system.
Keywords :
integrated optics; optical communication equipment; optical filters; photonic crystals; transfer function matrices; wavelength division multiplexing; CWDM; G.694.2; ITU-T recommendation; coarse wavelength division multiplexing system; dielectric layer; phase shifted 1D photonic crystal filter; phase shifted photonic crystal based filter; squared flat top spectral characteristics; transfer matrix method; Band pass filters; Dielectrics; Optical films; Optical filters; Optical refraction; Optical variables control; Optical waveguides; Photonic band gap; Photonic crystals; Transmission line matrix methods; Photonic Crystal; optical flat top band pass filter; photonic band gap (PBG); transfer matrix;
Conference_Titel :
Emerging Trends in Electronic and Photonic Devices & Systems, 2009. ELECTRO '09. International Conference on
Conference_Location :
Varanasi
Print_ISBN :
978-1-4244-4846-3
DOI :
10.1109/ELECTRO.2009.5441061
