A versatile single-photon spectrograph for the spectral measurement of the two-photon state

Xiao Xiang; Ruifang Dong; Runai Quan; Yaqing Jin; Ye Yang; Ming Li

doi:10.1117/12.2574997

10 October 2020 A versatile single-photon spectrograph for the spectral measurement of the two-photon state

Xiao Xiang, Ruifang Dong, Runai Quan, Yaqing Jin, Ye Yang, Ming Li

Proceedings Volume 11555, Real-time Photonic Measurements, Data Management, and Processing V; 115550K (2020) https://doi.org/10.1117/12.2574997
Event: SPIE/COS Photonics Asia, 2020, Online Only

Abstract

A new type of single-photon spectrograph combining a tunable optical filter and a dispersive element is presented for measurement of the spectral properties of the two-photon state. In comparison with the previous single-photon spectrograph which is merely based on the dispersive Fourier transformation (DFT) technique, this scheme avoids the need for additional wavelength calibration and the electronic laser trigger for coincidence measurement; therefore, its application is extended to continuous wave (CW) pumped two-photon sources. The achievable precision of the spectrum measurement has also been discussed in theory and demonstrated experimentally with a CW pumped periodically poled lithium niobate (PPLN) waveguide-based spontaneous parametric down conversion photon source. Such a device is expected to be a versatile tool for the characterization of the frequency entangled two-photon state.

Conference Presentation

Citation Download Citation

Xiao Xiang, Ruifang Dong, Runai Quan, Yaqing Jin, Ye Yang, and Ming Li "A versatile single-photon spectrograph for the spectral measurement of the two-photon state", Proc. SPIE 11555, Real-time Photonic Measurements, Data Management, and Processing V, 115550K (10 October 2020); https://doi.org/10.1117/12.2574997

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