Characteristics of Grating Assisted Couplers Used as Narrow-Band Optical Filters
With the availability of optical circuit components such as couplers, gratings and mirrors, optical filter circuits of various configuration can be readily assembled. Filters and resonant circuits realized without gratings have been reported in the past1–4. Here we report on the simulated performance characteristics of circuits consisting of lumped element 2×2 couplers, gratings, lossy or partially reflecting mirrors and optical waveguides. Loss is admitted in the couplers, in the transmission lines and in the reflecting elements. Effects of polarization and mode conversion are excluded. From the analysis point of view it is irrelevant whether the circuit components are fabricated using bulk wave, surface wave (integrated) or optical fibre technology.
KeywordsGroup Delay Ring Resonator Resonant Circuit Spectral Filter Optical Fibre Technology
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