Xie, Z;
Luo, KH;
Chang, KC;
Panoiu, NC;
Herrmann, H;
Silberhorn, C;
Wong, CW;
(2019)
Efficient C-band single-photon upconversion with chip-scale Ti-indiffused pp-LiNbO3 waveguides.
Applied Optics
, 58
(22)
pp. 5910-5915.
10.1364/AO.58.005910.
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Abstract
Frequency upconversion for single photons at telecom wavelengths is important to simultaneously meet the different wavelength requirements for long-distance communications and quantum memories in a quantum nodal network. It also enables the detection for the telecom “flying qubit” photons with silicon-based efficient single-photon detectors with low dark count (DC) rates. Here, we demonstrate the frequency upconversion of attenuated single photons, using a low-loss titanium-indiffused periodically poled lithium niobate waveguide, pumped with a readily available erbium-doped fiber amplifier in the L-band. Internal and conversion efficiencies up to 84.4% and 49.9% have been achieved, respectively. The DC rates are suppressed down to 44 kHz at 13.9% end-to-end quantum efficiency (including full conversion and detection), enabled by our long-wavelength pump configuration and narrow 3.5-GHz bandpass filtering.
| Type: | Article |
|---|---|
| Title: | Efficient C-band single-photon upconversion with chip-scale Ti-indiffused pp-LiNbO3 waveguides |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1364/AO.58.005910 |
| Publisher version: | https://doi.org/10.1364/AO.58.005910 |
| Language: | English |
| Additional information: | This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions. |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Electronic and Electrical Eng |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10081060 |
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