Serial-parallel conversion for single photons with heralding signals
Serial-parallel conversion for single photons with heralding signals
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DOI：
10.1364/oe.25.032443
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发表时间：
2017-12
期刊：
影响因子：
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通讯作者：
T. Kiyohara;R. Okamoto;S. Takeuchi
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文献类型：
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作者：
T. Kiyohara;R. Okamoto;S. Takeuchi
我们提出了一个先驱单光子源（先驱SPS）的串并转换。我们从理论上表明，与预告信号，串并转换器可以路由的n个光子的流n个不同的空间模式比不使用预告信号的情况下更有效。我们还实验证明了串行并行转换产生的两个光子从一个预示SPS。我们实现了0.533 \pm 0.003的转换效率，这超过了最大可实现的效率0.5的串行-并行转换使用unherded光子，并使用分束器的效率（0.25）的两倍。当光转换器中的损耗被校正时，电流设置的效率可以增加到0.996 μ m0.006。
We present serial-parallel conversion for a heralded single photon source (heralded SPS). We theoretically show that with the heralding signal, the serial-parallel converter can route a stream of n photons to n different spatial modes more efficiently than is the case without using a heralding signal. We also experimentally demonstrate serial-parallel conversion for two photons generated from a heralded SPS. We achieve a conversion efficiency of 0.533 \pm 0.003, which exceeds the maximum achievable efficiency of 0.5 for serial-parallel conversion using unheralded photons, and is double the efficiency (0.25) for that using beamsplitters. When the losses in the optical converter are corrected for, the efficiency of the current setup can be increased up to 0.996 \pm 0.006.