Research Initiation: Squeezed State Enhanced Frequency Modulation Spectroscopy (ROA Supplement)

本研究的目的是通过实验证明利用光压缩态来提高调频光谱可用灵敏度的可行性，当用作化学复合物的光学传感探针时，材料处理反应器中常见的气相环境。这样的演示将是第一个在光谱应用中利用光压缩态的优势，并将开辟利用吸收光谱来检测低浓度或以其他方式难以以非常高的灵敏度检测分子和自由基的可能性。压缩态的使用将使通常与调频光谱相关的调幅背景电平降低到通常的散点噪声或量子限制值以下。

The objective of this research is to demonstrate experimentally the feasibility of using optical squeezed states to enhance the available sensitivity of frequency modulation spectroscopy when used as an optical sensing probe of a chemically complex, gas phase environment of the type commonly encountered in materials processing reactors. Such a demonstration would be the first to use optical squeezed states to advantage in a spectroscopic application and would open up the possibility of using absorption spectroscopy to detect low concentration or otherwise difficult to detect molecular and radical species at very high sensitivity. The use of squeezed states will reduce the amplitude modulated background level normally associated with frequency modulation spectroscopy to below the usual shot noise or quantum limited value.