激光中最小可测频移的一般量子极限及优化
The General Quantum Limit for and the Optimization of the Minimum Measurable Frequency Shift in a Laser
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中文总结 AI 辅助
研究单模理想激光最小可测频移，发现其由自发发射相位扩散和真空模式散粒噪声共同决定，给出了实际传感器中 MMFS 的表达式，还确定了三种传感模式下 MMFS 的最佳值及所需条件。
中文摘要 AI 辅助
我们表明，与传统理解相反，单模理想激光的最小可测频移（MMFS）由自发发射引起的相位扩散和真空模式引起的散粒噪声共同决定。对于所有实际传感器，MMFS 由测量带宽和 Schwalow - Townes 线宽的几何平均值乘以一个在特定条件下可能远大于 1 的因子给出。我们确定了三种不同传感模式（不平衡马赫 - 曾德尔干涉仪、无源法布里 - 珀罗腔（FPC）和与参考激光外差）的 MMFS 最佳值，并确定达到这些 MMFS 值所需的条件。
英文摘要
We show that, contrary to conventional understanding, the minimum measurable frequency shift (MMFS) for a single-mode ideal laser is determined by a combination of phase diffusion caused by SE and the shot noise caused by the VM. For all practical sensors, the MMFS is found to be given by the geometric mean of the measurement bandwidth and the Schwalow-Townes Linewidth, multiplied by a factor which can be much larger than unity under certain conditions. We determine the optimal value for the MMFS for three different sensing modalities, an unbalanced Mach-Zehnder Interferometer, a passive Fabry-Perot cavity (FPC), and heterodyning with a reference laser, and identify the conditions needed for reaching the optimal value.
发表机构
- Northwestern University（西北大学）
机构由 AI 辅助整理，请以论文原文为准。
