Stable nondegenerate optical parametric oscillation at degenerate frequencies in Na:KTP

Details Stable nondegenerate optical parametric oscillation at degenerate frequencies in Na:KTP Stable nondegenerate optical parametric oscillation at degenerate frequencies in Na:KTP

2002-12-19

arxiv.org/abs/quant-ph/0212113v2

J. Opt. B, Quantum Semiclass. Opt., 5, 262 (2003)

Physics

Quantum Physics

Scientific paper

10.1088/1464-4266/5/3/310

We report the realization of a light source specifically designed for the generation of bright continuous-variable entangled beams and for Heisenberg-limited inteferometry. The source is a nondegenerate, single-mode, continuous-wave optical parametric oscillator in Na:KTP, operated at frequency degeneracy and just above threshold, which is also of interest for the study of critical fluctuations at the transition point. The residual frequency-difference jitter is $\pm$ 150 kHz for a 3 MHz cold cavity half-width at half maximum. We observe 4 dB of photon-number-difference squeezing at 200 kHz. The Na:KTP crystal is noncritically phase-matched for a 532 nm pump and polarization crosstalk is therefore practically nonexistent.

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