Conference on Lasers and Electro-Optics 2012
DOI: 10.1364/cleo_at.2012.jth3k.5
Optica, Optics Letters, 4(37), p. 476, 2012
DOI: 10.1364/ol.37.000476
We present a device for two-stage frequency upconversion of single-photon-level signals in the 1.55 μm telecom band to the green spectral region with low excess noise, suitable for detection by low-timing-jitter silicon single-photon avalanche photodiodes (APDs). We achieve a net conversion efficiency of 87% and a system timing jitter below 70 ps FWHM, dominated by the jitter of the APD. Modifications of our device are suitable for downconversion of single photons from visible-wavelength quantum emitters into the telecom band.