Noise Filtering for Highly Correlated Photon Pairs From Silicon Waveguides
Noise Filtering for Highly Correlated Photon Pairs From Silicon Waveguides
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DOI：
10.1109/jlt.2019.2942436
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发表时间：
2019-11-01
影响因子：
4.7
通讯作者：
Ju, Jung Jin
中科院分区：
文献类型：
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作者：
Lee, Jong-Moo;Lee, Wook-Jae;Ju, Jung Jin
我们制作了硅螺旋波导和环形谐振腔，利用自发四波混频产生光子对。用带通滤波器和抽运抑制滤波器相结合的方法滤除噪声后，测得硅波导光子对的符合与偶然比（CAR）高达400。通过增加片上泵抑制MZI，CAR增强到700。我们观察到，来自硅螺旋的光子对的CAR高度依赖于与泵浦波长的波长失谐。根据实验结果，我们讨论了与CAR退化相关的噪声源。
We fabricate silicon waveguide spirals and a ring resonator to generate photon pairs based on a spontaneous four-wave mixing. The coincidence-to-accidental-ratio (CAR) of photon pairs from the silicon waveguides is measured up to 400 after a noise-filtering by using the combination of bandpass filters and pump-rejection filters. The CAR is enhanced up to 700 by adding on-chip pump-rejection MZIs. We observe the CAR of the photon pairs from a silicon spiral is highly depending on the wavelength detuning from the pump wavelength. We discuss the noise sources related to the degradation of the CAR based on our experimental results.