Acousto-optic phase modulation properties of coaxially-deposited ZnO transducers on single-mode fibers

Fred S. Hickernell

doi:10.1117/12.366751

27 October 1999 Acousto-optic phase modulation properties of coaxially-deposited ZnO transducers on single-mode fibers

Fred S. Hickernell

Proceedings Volume 3803, Materials and Devices for Photonic Circuits; (1999) https://doi.org/10.1117/12.366751
Event: SPIE's International Symposium on Optical Science, Engineering, and Instrumentation, 1999, Denver, CO, United States

Abstract

The acoustooptic (AO) phase modulation properties of coaxially deposited zinc oxide (ZnO) transducers on single mode optical fibers have been experimentally and theoretically investigated at several laboratories over the past 15 years. Maximum phase shifts are observed at distinct frequencies, corresponding to bulk acoustic waves in the fiber, over the transducer operating range of 200 MHz to 1.0 GHz. Phase shift values have been measured with both cw and pulsed signal inputs to the transducers from milliwatts to above 1 Watt. Transducer lengths have been varied from 30 mm to 2 mm to determine the effects of AO phase shift on the length of the interaction. Modulation efficiencies in the range of 0.2 to 0.3 radians per square root of input power (in mW) per centimeter, for 2 to 6 mm interaction lengths, have been observed at frequencies in the 200 to 400 MHz region corresponding to acoustic wavelengths on the order of the core dimensions of the optical fiber. The characteristics and capabilities of AO modulation in optical fibers with deposited coaxial ZnO transducers is discussed using examples from experimental work.

Citation Download Citation

Fred S. Hickernell "Acousto-optic phase modulation properties of coaxially-deposited ZnO transducers on single-mode fibers", Proc. SPIE 3803, Materials and Devices for Photonic Circuits, (27 October 1999); https://doi.org/10.1117/12.366751

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