Optimization of distributed resistive metal film heaters in thermally tunable dispersion compensators for high-bit-rate communication systems |
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Authors: | Steinvurzel Paul MacHarrie Robert A Baldwin Kirk W Van Hise Charles W Eggleton Benjamin J Rogers John A |
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Affiliation: | Lucent Technologies, 600 Mountain Avenue, Murray Hill, New Jersey 07974, USA. pes@physics.usyd.edu.au |
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Abstract: | Tunable dispersion compensators are an essential component for optical networks operating at 40 Gbits/s and beyond. One fiber-based tunable dispersion compensator that has proved to be effective consists of a chirped fiber Bragg grating tuned by a thin-film distributed resistive heating element. We describe several modifications to the heater design that minimize temperature-induced higher-order dispersion, eliminate the need for a second stabilization heater when the device is operated at constant ambient temperature, and significantly lower its maximum operating temperature. We demonstrate a tunable dispersion compensator with a single thin-film heater that provides over 500 ps/nm of tunable dispersion over a fixed 100-GHz bandwidth with a maximum operating temperature of less than 125 degrees C above ambient. |
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