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arXiv 2001.02901quant-phphysics.optics
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基于硅光子芯片的环形腔光子对源相位分辨联合光谱层析成像

Phase resolved joint spectra tomography of a ring resonator photon pair source using a silicon photonic chip

Massimo Borghi

摘要:

光子量子技术的指数增长正在推动对测量其信息载体质量的工具的需求。其中最突出的是受激发射层析成像(SET),它使用经典的相干场来测量光子对的联合光谱幅度(JSA),具有高的速度和分辨率。虽然JSA的模量可以直接从单个强度测量中解决,但联合光谱相位(JSP)的检索更具挑战性,并且受到较少的关注。然而,作为芯片集成微谐振器的技术相关性的广泛类别的自发源具有具有丰富结构的JSP,其携带隐藏在强度域中的相关性。在这里,使用一个紧凑的和可重构的硅光子芯片,它是第一次测量的微环谐振腔光子对源的复杂JSA。光子电路相干激励环和参考波导,并通过一种新的相位重构技术,由它们的激励场形成的干涉图被用来映射环JSP。该工具补充了迄今为止实施的传统的庞大而复杂的方法,同时最大限度地减少了所需的资源。

英文摘要:

The exponential growth of photonic quantum technologies is driving the demand of tools for measuring the quality of their information carriers. One of the most prominent is Stimulated Emission Tomography (SET), which uses classical coherent fields to measure the Joint Spectral Amplitude (JSA) of photon pairs with high speed and resolution. While the modulus of the JSA can be directly addressed from a single intensity measurement, the retrieval of the Joint Spectral Phase (JSP) is far more challenging and received minor attentions. However, a wide class of spontaneous sources of technological relevance, as chip integrated micro-resonators, have a JSP with a rich structure, that carries correlations hidden in the intensity domain. Here, using a compact and reconfigurable silicon photonic chip, it is measured for the first time the complex JSA of a micro-ring resonator photon pair source. The photonic circuit coherently excites the ring and a reference waveguide, and the interferogram formed by their stimulated fields is used to map the ring JSP through a novel phase reconstruction technique. This tool complements the traditionally bulky and sophisticated methods implemented so far, simultaneously minimizing the set of required resources.

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