Title :
Spectrum response improvement of higher order series coupled microring resonator filter by UV trimming
Author :
Naganawa, Toshiki ; Ueno, Satoshi ; Kokubun, Yasuo
Author_Institution :
Dept. of Electr. & Comput. Eng., Yokohama Nat. Univ., Japan
Abstract :
The filter response of higher order series coupled microring resonators was improved by the selective ultraviolet (UV) trimming of resonant wavelengths of individual microrings. The peak transmittance was increased by 13 dB and the crosstalk was reduced by 18 dB for quadruple series coupled microring filter. We also demonstrated narrow channel spacing microring filter array with identical round-trip length by selective UV trimming.
Keywords :
channel spacing; micro-optics; microcavities; optical arrays; optical crosstalk; optical filters; optical resonators; ultraviolet radiation effects; UV trimming; crosstalk; filter response; higher order microring resonators; microring filter array; narrow channel spacing filter array; quadruple microring filter; resonant wavelengths; resonator filter; series coupled microring filter; series coupled microring resonators; spectrum response improvement; transmittance; Argon; Lamps; Mercury (metals); Optical films; Optical filters; Optical resonators; Refractive index; Resonance; Resonator filters; Substrates; Add–drop filter; high order series coupling; microring; optical waveguide; ultraviolet (UV) trimming; wavelength filter;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2005.854359
