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| Heralded Entangled Single-photon Source and Research on the Traceability System of the Optical Radiation Based on the Quantization |
| YU Bing1,2,JIN Wei-qi1,YUAN Lin-guang2,YANG Hong-ru2,WU Lei2,MA Shi-bang2,YOU Yue2,CHEN Juan2 |
1. MOE Key Laboratory of Optoelectronic Imaging Technology and System, Beijing Institute of Technology, Beijing 100081, China
2. Xi′an Institute of Applied Optics, Xi′an, Shannxi 710065, China |
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Abstract A kind of entangled single-photon source was proposed to meet the requirements of the measurement and traceability of very weak energy level from a single-photon to femto-joule. The heralded entangled photon pairs at 795 nm wavelength were generated through four wave mixing based on the cold atoms. The narrowband paired and high-quality single-photon source was obtained through the suppression of background radiance and real-time compensation, high precision laser frequency stabilization, timing pulse precise synchronization. On this basis, the calibration methods of entangled photon source parameter were studied. The further establishment of the new optical radiation traceability system based on the quantum basic standards were considered, which is to reduce the measurement uncertainty of very weak optical radiation parameters.
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Received: 19 June 2020
Published: 23 June 2021
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2021, Vol. 42 
