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VOLUME 33 (1981) | ISSUE 2 | PAGE 85
Use of narrow optical resonances for measuring small displacements and for building gravity-wave detectors
The first results of the use of narrow optical resonances for precise measurements of small displacements are reported. The experiments were conducted using an He-Ne laser at λ = 3,39 μτη with a methane cell. The nonlinear resonances in methane with a width of 50 kHz and an intensity of about 1 mW were used. A periodic perturbation was supplied to one of the laser cavity mirrors. The absolute sensitivity of the measurements was 6χ10~6 A along a base of 5 Χ 102 cm.