Abstract

The temporal response of a fiber-optic Fabry–Perot-type interferometer, formed by cleaving the ends of a length of highly birefringent (Hi-Bi) fiber, to high-frequency heat pulses is investigated both theoretically and experimentally. The heat pulses are produced by amplitude modulating the output of an argon laser with a variable-frequency Bragg cell. This beam is focused at one of the cleaved ends of the interferometer; the fastest temporal response occurs when the beam is focused onto the core of the fiber. A time response of ~2.5 μs is measured.

© 1991 Optical Society of America

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