Heidelberg 2015 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 31: Poster: Quantum Optics and Photonics II

Q 31.54: Poster

Dienstag, 24. März 2015, 17:00–19:00, C/Foyer

Realization of an optical parametric oscillator for the downconversion of single photons to the telecom O-band — •Richard Nelz, Benjamin Kambs, and Christoph Becher — Universität des Saarlandes, FR 7.2 Experimentalphysik, Campus E2.6, 66123 Saarbrücken

Recently, much progress has been achieved in the fabrication of single photon emitters based on color centers in diamond, e.g., SiV-centers emitting at 738 nm [1]. However, efficient single photon transmission in future quantum networks requires wavelengths within one of the low-loss bands of optical fibers. We here propose an experimental scheme for frequency downconversion of single photons at 738 nm into the telecom O-band around 1310 nm. In order to achieve the required difference frequency generation process, a strong cw signal at 1690 nm from an optical parametric oscillator (OPO) is mixed with the single photons in a periodically poled lithium niobate (PPLN) waveguide crystal. Here, we present a performance study of a home-built singly resonant OPO delivering the necessary high-power output at 1690 nm and its tunability over a wide spectral range. Finally, we analyze the feasibility of the proposed scheme for realistic experimental parameters.

[1] E. Neu et al., New J. Phys. 13 025012 (2011)