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Narrow-band single photons from a single-resonant optical parametric oscillator far below threshold
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View: Figures


Image of FIG. 1.
FIG. 1.

(Color online) Schematic setup: an external-cavity diode laser is frequency doubled, and the mode-cleaned emission pumps an OPO below threshold. Signal and idler photons are detected by avalanche photodiodes, and their cross-correlation statistics is monitored (BP/LP/SP: band/long/short pass filter, HC: Hänsch-Couillaud stabilization, PBS: polarizing beam splitter, and P: piezoelement). The inset shows a typical dispersion signal for the HC cavity lock with resonances at multiples of half of the pump wavelength .

Image of FIG. 2.
FIG. 2.

(Color online) Second-order cross-correlation function between signal and idler photons. The periodic structure traces the cavity round-trip time of . A cavity bandwidth of can be derived by the exponential decay of the envelope. The solid line is obtained from a theoretical model of the correlation function as described in the text. Inset (a) depicts the position of the pinhole for filtering the mode. Inset (b) shows experimental results of the second-order cross-correlation function with pinhole filtering; a doubled round-trip time can be observed.


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Narrow-band single photons from a single-resonant optical parametric oscillator far below threshold