Homodyne locking of a squeezer

M. Heurs, I. R. Petersen, M. R. James, E. H. Huntington

    Research output: Contribution to journalArticlepeer-review

    19 Citations (Scopus)

    Abstract

    We report on the successful implementation of an approach to locking the frequencies of an optical parametric oscillator (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.

    Original languageEnglish
    Pages (from-to)2465-2467
    Number of pages3
    JournalOptics Letters
    Volume34
    Issue number16
    DOIs
    Publication statusPublished - 15 Aug 2009

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