双色光谱多模集成SU（1，1）干涉仪
Two-colour spectrally multimode integrated SU(1,1) interferometer
摘要：
多模集成干涉仪在光谱工程和光谱测量中有着巨大的应用潜力。然而，集成平台的材料分散构成了限制这种干涉仪的性能和精度的障碍。与此同时，双色非线性干涉仪是在某一频率范围内难以进行测量的情况下用于非线性应用的重要工具。在这篇论文中，我们从理论上发展和研究了一种工作在超灵敏模式下的集成多模双色SU（1，1）干涉仪。通过确保集成平台的正确设计，我们抑制了色散，从而显著提高了干涉图案的可见性。我们证明，这样的干涉仪克服了经典的相位灵敏度限制宽的参数增益范围内，当高达$3*10^4$光子产生。
英文摘要：
Multimode integrated interferometers have great potential for both spectral engineering and metrological applications. However, material dispersion of integrated platforms constitutes an obstacle which limits the performance and precision of such interferometers. At the same time, two-colour non-linear interferometers present an important tool for metrological applications, when measurements in a certain frequency range are difficult. In this manuscript, we theoretically develop and investigate an integrated multimode two-colour SU(1,1) interferometer that operates in a supersensitive mode. By ensuring a proper design of the integrated platform, we suppress dispersion and thereby significantly increase the visibility of the interference pattern. We demonstrate that such an interferometer overcomes the classical phase sensitivity limit for wide parametric gain ranges, when up to $3*10^4$ photons are generated.
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