Homodyne locking of a squeezer

Details Homodyne locking of a squeezer Homodyne locking of a squeezer

2009-07-19

arxiv.org/abs/0907.3323v1

Optics Letters, 34, 2465, 2009

Physics

Quantum Physics

Accepted to Optics Letters

Scientific paper

We report on the successful implementation of a new approach to locking the frequencies of an OPO-based squeezed-vacuum source and its driving laser. The technique allows the simultaneous measurement of the phase-shifts induced by a cavity, which may be used for the purposes of frequency-locking, as well as the simultaneous measurement of the sub-quantum-noise-limited (sub-QNL) phase quadrature output of the OPO. The homodyne locking technique is cheap, easy to implement and has the distinct advantage that subsequent homodyne measurements are automatically phase-locked. The homodyne locking technique is also unique in that it is a sub-QNL frequency discriminator.

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