Method and apparatus for measuring the losses of an optical cavi

Details Method and apparatus for measuring the losses of an optical cavi Method and apparatus for measuring the losses of an optical cavi

1985-08-16

1988-12-27

McGraw, Vincent P.

Optics: measuring and testing

Of light reflection

356124, 356447, G01N 2155

Patent

active

047937092

ABSTRACT:
A method and associated apparatus for measuring the intensity decay time of an optical cavity is particularly useful for accurate measurement of cavities of the type that include highly reflective mirrors. In the method, apparatus is provided for generating at least one pulse of laser light having a bandwidth that exceeds the resonant frequency spacing of the optical cavity and for directing that pulse into the cavity. The intensity of the light within the cavity is then measured and the amount of time is determined for such intensity to decay from a first predetermined value to a second predetermined value.

REFERENCES:
patent: 4571085 (1986-02-01), Anderson
"Mirror Reflectometer Based on Optical Cavity Decay Time", Anderson et al., Applied Optics, Apr. 1984, pp. 1238-1245.
"Method For Measuring Reflection Coefficients Close To Unity", Vinokurov et al., Novosibirsk, 1979.

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