The conversion of phase to amplitude fluctuations of a light beam by an optical cavity

Details The conversion of phase to amplitude fluctuations of a light beam by an optical cavity The conversion of phase to amplitude fluctuations of a light beam by an optical cavity

2008-05-05

arxiv.org/abs/0805.0528v1

Physics

Quantum Physics

Scientific paper

10.1119/1.2937903

Very low intensity and phase fluctuations are present in a bright light field such as a laser beam. These subtle quantum fluctuations may be used to encode quantum information. Although intensity is easily measured with common photodetectors, accessing the phase information requires interference experiments. We introduce one such technique, the rotation of the noise ellipse of light, which employs an optical cavity to achieve the conversion of phase to intensity fluctuations. We describe the quantum noise of light and how it can be manipulated by employing an optical resonance technique and compare it to similar techniques, such as Pound-Drever-Hall laser stabilization and homodyne detection.

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