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We have reduced the effect of thermal gradients across a fiber grating-based dispersion compensation module by embedding the grating in a thermal conductor surrounded by a thermal insulator, which keeps the grating length at a nearly uniform temperature. We modeled the package performance with finite-element methods and confirmed the results experimentally. We have found no measurable perturbation in the device dispersion during thermal testing, even as 80°C thermal gradients were imposed across the module.
Date of Publication: Jan. 2004