Efficient single-photon counting at 1.55μm by intracavity frequency upconversion in a unidirectional ring laser
Efficient single-photon counting at 1.55μm by intracavity frequency upconversion in a unidirectional ring laser
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DOI：
10.1063/1.2378588
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发表时间：
2006-11
影响因子：
4
通讯作者：
H. Pan;H. Dong;H. Zeng;W. Lu
中科院分区：
文献类型：
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作者：
H. Pan;H. Dong;H. Zeng;W. Lu
通过在周期性极化铌酸锂 (PPLN) 晶体中使用 1.06μm 单向环形激光器的强腔内泵进行和频混合，将 1.55μm 的单光子信号转换为其可见光复制品。在环形激光器配置中，可以抑制 PPLN 晶体中的驻波光折变效应，因此可以控制腔内泵浦的光谱带宽，以实现出色的准相位匹配。转换效率为 96%，相应的背景计数小于 6.0×105s−1。单光子上转换用于 1.55μm 处的高效单光子计数，且具有长期稳定性。
A single-photon signal at 1.55μm was converted to its visible replica by sum-frequency mixing with a strong intracavity pump of a unidirectional ring laser at 1.06μm in a periodically poled lithium niobate (PPLN) crystal. In the ring laser configuration, standing-wave photorefractive effects in the PPLN crystal could be suppressed and consequently, the spectral bandwidth of the intracavity pump could be controlled for excellent quasi-phase-matching. A conversion efficiency of 96% was demonstrated, and the corresponding background counts were less than 6.0×105s−1. The single-photon upconversion was used for efficient single-photon counting at 1.55μm with long-term stability.