arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 0810.4209quant-ph
收藏

非线性腔内吸收光谱的量子极限和鲁棒性

Quantum Limits and Robustness of Nonlinear Intracavity Absorption Spectroscopy

John K. Stockton, Ari K. Tuchman

阅读 PDF
arXiv 页面 ↗HTML 原文 ↗

摘要：

研究了非线性介质腔内吸收光谱的极限。使用一个共同的理论框架，我们比较检测的微量气体在未驱动的腔与增益接近和高于阈值，一个驱动腔与增益保持在阈值以下，和一个腔驱动接近饱和点的可饱和吸收体。这些基于相变的计量方法通常是由自发发射量子限制的，并且我们将它们与空腔散粒噪声限制的情况进行比较。虽然非线性介质实现的基本限制不超过空腔的限制，我们表明，非线性方法对某些技术噪声模型更强大。这种认识可能有应用程序在光谱仪设计中的设备在非理想的现场环境中工作。

英文摘要：

We investigate the limits of intracavity absorption spectroscopy with nonlinear media. Using a common theoretical framework, we compare the detection of a trace gas within an undriven cavity with gain near and above threshold, a driven cavity with gain kept just below threshold, and a cavity driven close to the saturation point of a saturable absorber. These phase-transition-based metrology methods are typically quantum-limited by spontaneous emission, and we compare them to the empty cavity shotnoise-limited case. Although the fundamental limits achievable with nonlinear media do not surpass the empty cavity limits, we show that nonlinear methods are more robust against certain technical noise models. This recognition may have applications in spectrometer design for devices operating in non-ideal field environments.

机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。

↑