This article is cited in 2 papers

Brief Communications

Spatial filtering of radiation from a multimode waveguide in determination of hydroacoustic pressures

Yu. N. Kulchin, V. F. Obukh


Abstract: A study is made of the possibility of using spatial filtering of the speckle pattern of radiation from a single-fiber sensor for the determination of the pressure in an acoustic wave. It is shown that a modification of the initial speckle pattern caused by a dynamic pressure on a fiber waveguide makes the sensor signal a linear function of the change in pressure. It is shown that an increase in the light wave intensity at the entry to a sensor results in a slight reduction in the signal/noise ratio.

UDC: 621.373.826:621.396

PACS: 42.81.Pa, 42.79.Ci, 42.30.Ms, 43.58.Fm, 43.30.Xm

Received: 08.07.1985

 English version: Soviet Journal of Quantum Electronics, 1986, 16:3, 424–426

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