Generation of twin beams from an optical parametric oscillator pumped by a frequency-doubled diode laser

Abstract

Quantum-correlated twin beams were generated from a triply resonant optical parametric oscillator with an a-cut KTP crystal pumped by a frequency-doubled diode laser. A total output of 5.1 mW was obtained in the classical-to-nonclassical-light conversion system driven by a 50-mW diode laser at 1080 nm. Quantum noise reduction of 4.3 dB (63%) in the intensity difference between the twin beams was successfully observed at the detection frequency of 3 MHz.

5 pages, 3 figures, to appear in Opt. Lett

References in corpus (4)

• Conditional preparation of a quantum state in the continuous variable regime: generation of a sub-Poissonian state from twin beams
• Ultra-low threshold CW Triply Resonant OPO in the near infrared using Periodically Poled Lithium Niobate
• Quantum channel using photon number correlated twin beams
• Application of an all-solid-state, frequency-doubled Nd:YAP laser to the generation of twin beams at 1080 nm

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• Multiphoton communication in lossy channels with photon-number entangled states
• Large alphabet quantum key distribution with two-mode coherently correlated beams
• Intensity correlations and entanglement by frequency doubling in a dual ported resonator
• Quantum communication with photon-number entangled states and realistic photodetection