Optical Interferometers with Reduced Sensitivity to Thermal Noise

Details Optical Interferometers with Reduced Sensitivity to Thermal Noise Optical Interferometers with Reduced Sensitivity to Thermal Noise

2008-06-23

arxiv.org/abs/0806.3750v1

Physics

Quantum Physics

5 pages, 3 figures

Scientific paper

10.1103/PhysRevLett.101.260602

A fundamental limit to the sensitivity of optical interferometry is thermal noise that drives fluctuations in the positions of the surfaces of the interferometer's mirrors, and thereby in the phase of the intracavity field. Schemes for reducing this thermally driven phase noise are presented in which phase shifts from concomitant strains at the surface and in the bulk of the substrate compensate the phase shift due to the displacement of the surface. Although the position of the physical surface fluctuates, the optical phase upon reflection can have reduced sensitivity to this motion.

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