Abstract

A broadband quantum noise source based on detection of shot noise of a balanced photodetector is demonstrated. Precise electro-optical tuning of the balanced photodetector circuit was carried out by an integrated optical beam splitter constructed in the form of the dual output Mach–Zehnder interferometer on a lithium niobate substrate. The classical component of the detected noise related to the relative intensity noise of a laser diode was suppressed by more than 15 dB. At the maximum laser power of 100 mW, the power spectral density of detected shot noise was 12 dB higher than the level of technical noise of the measuring system in the frequency band above 3 GHz.

中文翻译：

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基于具有可调谐集成光学分束器的平衡光电探测器散粒噪声的量子噪声源

摘要

演示了基于平衡光电探测器散粒噪声检测的宽带量子噪声源。平衡光电探测器电路的精确电光调谐是通过在铌酸锂基底上以双输出马赫-曾德尔干涉仪的形式构建的集成光束分束器进行的。检测到的与激光二极管相对强度噪声相关的经典分量被抑制了 15 dB 以上。在最大激光功率为100 mW时，检测到的散粒噪声的功率谱密度比测量系统在3 GHz以上频段的技术噪声水平高12 dB。