Widely tunable, narrow optical bandpass Gaussian filter using a silicon microactuator

A Littrow diffraction grating Gaussian bandpass optical filter uses a silicon microactuator to tune over 40 nm with narrow bandwidth, 2 dB insertion loss, 0.2 dB PDL, /spl plusmn/20 ps/nm dispersion, fast tuning, and accurate wavelength control in a compact butterfly package.

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