Micro/nano-fiber-based source of heralded single photons at the telecom band

Jie Su; Liang Cui; Yuhang Li; Xiaoying Li

doi:doi:10.3788/COL201816.041903

Chinese Optics Letters, 2018, 16 (4): 041903, Published Online: Jul. 12, 2018

Micro/nano-fiber-based source of heralded single photons at the telecom band Download： 569次

Jie Su ¹Liang Cui ^1,*Yuhang Li ^2,3Xiaoying Li ¹

Author Affiliations

¹ College of Precision Instrument and Opto-electronics Engineering, Key Laboratory of Optoelectronics Information Technology of Ministry of Education, Tianjin University, Tianjin 300072, China

² Joint Institute for Measurement Science, Tsinghua University, Beijing 100084, China

³ Department of Physics, Tsinghua University, Beijing 100084, China

Figures & Tables

Fig. 1. Experimental setup. The area framed by the dashed line is the heralded single photon source, while the area framed by the dotted line is the measurement system for characterizing the source. G, diffraction grating; SMF, single mode fiber; DM, dichroic mirror; M, mirror; Fs, long-pass filters of signal photons; Fi, bandpass filters of idler photons; CWDM, coarse wavelength division multiplexer; SPD, single photon detector; BS, 50/50 beam splitter.

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Fig. 2. (a), (b) Measured single channel counting rates in the heralding and heralded channels Nt and Ns, as a function of average pump power Pa. The solid curves in (a) and (b) are the fitting polynomial with the dashed and dot-dashed lines, respectively, representing the linear and quadratic terms. (c) Two-fold coincidence and accidental coincidence counting rates N12 and Nac. (d) Coincidence-to-accidental ratio (CAR) as a function of Pa. The solid and hollow symbols denote results with and without subtracting the dark counts of SPDs. In (a), (b), and (c), the dark counts of SPDs are subtracted.

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Fig. 3. (a) Measured counting rate of true coincidence Nc. (b) Measured three-fold coincidence N123. (c) Measured second-order correlation function g(2)(0).

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Jie Su, Liang Cui, Yuhang Li, Xiaoying Li. Micro/nano-fiber-based source of heralded single photons at the telecom band[J]. Chinese Optics Letters, 2018, 16(4): 041903.

Micro/nano-fiber-based source of heralded single photons at the telecom band Download： 569次

Fig. 3. (a) Measured counting rate of true coincidence Nc. (b) Measured three-fold coincidence N123. (c) Measured second-order correlation function g(2)(0).

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Micro/nano-fiber-based source of heralded single photons at the telecom band Download： 569次

Fig. 3. (a) Measured counting rate of true coincidence Nc. (b) Measured three-fold coincidence N123. (c) Measured second-order correlation function g(2)(0).

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