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Hybrid InGaAsP-InP Mach-Zehnder Racetrack Resonator for Thermooptic Switching and Coupling Control

Research Area: Nanophotonics Year: 2005
Type of Publication: Article Keywords: optoelectronics, modulators, Mach-Zehnder interferometer
Authors: Green, W. M. J.; Lee, R. K.; DeRose, G. A.; Scherer, Axel; Yariv, A.
Journal: Optics Express Volume: 13
Number: 5 Pages: 1651-1659
Month: March
An InGaAsP-InP optical switch geometry based on electrical control of waveguide-resonator coupling is demonstrated. Thermooptic tuning of a Mach-Zehnder interferometer integrated with a racetrack resonator is shown to result in switching with ON-OFF contrast up to 18.5 dB. The optical characteristics of this unique design enable a substantial reduction of the switching power, to a value of 26 mW in comparison with 40 mW for a conventional Mach-Zehnder interferometer switch. Modulation response measurements reveal a 3 dB bandwidth of 400 kHz and a rise time of 1.8 µs, comparing favorably with current state-of-the-art thermooptic switches.
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