Phase modulation at 125 kHz in a Michelson interferometer using an inexpensive piezoelectric stack driven at resonance

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Abstract

Fast phase modulation has been achieved in a Michelson interferometer by attaching a lightweight reference mirror to a piezoelectric stack and driving the stack at a resonance frequency of about 125 kHz. The electrical behavior of the piezo stack and the mechanical properties of the piezo-mirror arrangement are described. A displacement amplitude at resonance of about 350 nm was achieved using a standard function generator. Phase drift in the interferometer and piezo wobble were readily circumvented. This approach to phase modulation is less expensive by a factor of roughly 50 than one based on an electro-optic effect. © 2001 American Institute of Physics.

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Hoeling, B. M., Fernandez, A. D., Haskell, R. C., & Petersen, D. C. (2001). Phase modulation at 125 kHz in a Michelson interferometer using an inexpensive piezoelectric stack driven at resonance. Review of Scientific Instruments, 72(3), 1630–1633. https://doi.org/10.1063/1.1347375

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