光纤辅助单光子摄谱仪
Fiber-assisted single-photon spectrograph
摘要：
我们演示了一个光纤集成光谱仪的实施，利用色群速度色散（GVD）在单模光纤。借助于GVD，我们在时间上拉伸超快脉冲，以便在时域中光谱解析单光子，由具有非常精确的时间分辨率的单光子计数模块检测。结果，从具有高信噪比的精确时间测量中恢复非常弱的脉冲的频谱。我们证明了我们的技术的潜力，通过应用我们的计划来分析的联合频谱强度分布的参量下转换源在电信波长。
英文摘要：
We demonstrate the implementation of a fiber-integrated spectrograph utilizing chromatic group velocity dispersion (GVD) in a single mode fiber. By means of GVD we stretch an ultrafast pulse in time in order to spectrally resolve single photons in the time domain, detected by single photon counting modules with very accurate temporal resolution. As a result, the spectrum of a very weak pulse is recovered from a precise time measurement with high signal to noise ratio. We demonstrate the potential of our technique by applying our scheme to analyzing the joint spectral intensity distribution of a parametric downconversion source at telecommunication wavelength.
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