Title :
Theory of loss and gain trimming of resonator-type filters
Author :
Little, B.E. ; Chu, Sai T.
Author_Institution :
Lab. for Phys. Sci., Maryland Univ., College Park, MD, USA
fDate :
6/1/2000 12:00:00 AM
Abstract :
The characteristic response of resonator-type filters is determined by the mutual resonator-to-resonator coupling coefficients, which are not readily trimmed once a device is fabricated. We show that loss and/or gain is a mechanism which can mimic the role of the coupling coefficients, and which can therefore be used for post-fabrication tuning or trimming. By using loss-only trimming, the throughput crosstalk performance can be improved by several orders of magnitude while incurring only small signal attenuation.
Keywords :
micro-optics; micromechanical resonators; optical communication equipment; optical crosstalk; optical resonators; optical tuning; optical waveguide filters; characteristic response; coupling coefficients; gain trimming; post-fabrication tuning; resonator-to-resonator coupling coefficients; resonator-type filters; small signal attenuation; throughput crosstalk performance; Crosstalk; Filtering theory; Optical attenuators; Optical feedback; Optical filters; Optical refraction; Optical resonators; Passband; Resonator filters; Shape;
Journal_Title :
Photonics Technology Letters, IEEE
