We report on simulated temperature-tunable single-channel/multichannel transmission filters in the infrared region (1300 nanometers -1650 nanometers) using a one-dimensional photonic crystal structure. A single channel can be selected in the photonic bandgap region based on the thickness of the quarter-wave stacks and temperature. The transmission coefficient of the transmitted defect modes is approximately the same as that required for telecommunication. For 20000 defect layers, 600 channels were created with full width at half maximum of 0.7 picometers at the center wavelength of ~ 1550 nm and channel separation of ~0.18 nanometer between 1500 nanometers-1600 nanometers.

The simulated multichannel comb filter [MCF] built on the stacking of the Fabry - Perot etalons that work in the telecommunication region between near-infra-red wavelengths (1538 −1558 nm) and (2333 - 2373 nm) has been demonstrated. Present work illustrates the dependence of defect modes produced on the stacked Fabry - Perot etalons. The FWHM of each channel is ∼0.043 picometers for the stacking of 20000 etalons. The spacing between the channels was ∼0.79 picometers and nearly uniform throughout the telecommunication band. The simulated MCF consists of ∼78 uniform channels within a range of ∼0.1 nm centered at 1550 nm.

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