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arXiv 1601.03530physics.opticsphysics.atom-phquant-ph
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用于触发单光子源的高开/关比纳秒laser脉冲

High on/off ratio nanosecond laser pulses for a triggered single-photon source

Gang Jin, Bei Liu, Jun He, Junmin Wang

摘要:

利用马赫-曾德尔型电光强度调制器(MZ-EOIM)对连续激光进行斩波,获得了852 nm高开关比的纳秒激光脉冲链。详细的依赖MZ-EOIM的开/关比的各种参数的特点。通过优化入射光束偏振和稳定MZ-EOIM温度,实现了12600:1的静态开/关比。测量并讨论了动态开/关比与脉冲重复率和脉冲占空比的关系。利用高开/关比纳秒脉冲激光系统实现了基于单个铯原子的触发单光子源,获得了明显的反聚束效应。

英文摘要:

An 852nm nanosecond laser pulse chain with a high on/off ratio is generated by chopping a continuous-wave laser beam using a Mach-Zehnder-type electro-optic intensity modulator(MZ-EOIM). The detailed dependence of the MZ-EOIM's on/off ratio on various parameters is characterized. By optimizing the incident beam polarization and stabilizing the MZ-EOIM temperature, a static on/off ratio of 12600:1 is achieved. The dynamic on/off ratios versus the pulse repetition rate and the pulse duty cycle are measured and discussed. The high-on/off-ratio nanosecond pulsed laser system was used in a triggered single-photon source based on a trapped single cesium atom, which reveals clear antibunching.

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