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arXiv 1908.05521physics.opticsphysics.app-phphysics.ins-det
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提高非线性光学传感器的速度和灵敏度

Enhancing the speed and sensitivity of a nonlinear optical sensor with noise

Said R. K. Rodriguez

摘要:

我们演示了如何将噪声转化为使用非线性腔的光学传感的优势。该腔由连续波激光器驱动进入光学双稳区。由于涨落的影响,腔在两个状态之间随机切换。通过分析在这两种状态下的停留时间,可以检测到对腔的谐振频率的扰动。在这里,这样的分析被呈现为扰动和噪声的强度的函数。通过增加噪声的标准差,我们发现,检测速度单调增加,而灵敏度峰值在一个有限的值的噪声强度。此外,我们还讨论了如何在最先进的实验平台中优化噪声辅助传感,仅依赖于腔体中因耗散而存在的最小噪声量。这些结果为在低功率和噪声环境下超快检测纳米颗粒、污染物、气体或光学谐振器的谐振频率的其他扰动开辟了新的前景。

英文摘要:

We demonstrate how noise can be turned into an advantage for optical sensing using a nonlinear cavity. The cavity is driven by a continuous wave laser into the regime of optical bistability. Due to the influence of fluctuations, the cavity randomly switches between two states. By analyzing residence times in these two states, perturbations to the resonance frequency of the cavity can be detected. Here, such an analysis is presented as a function of the strength of the perturbation and of the noise. By increasing the standard deviation of the noise, we find that the detection speed increases monotonically while the sensitivity peaks at a finite value of the noise strength. Furthermore, we discuss how noise-assisted sensing can be optimized in state-of-the-art experimental platforms, relying solely on the minimum amount of noise present in the cavity due to its dissipation. These results open new perspectives for the ultrafast detection of nanoparticles, contaminants, gases, or other perturbations to the resonance frequency of an optical resonator, at low powers and in noisy 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。

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