We describe a method to map the standing-wave pattern inside a Fabry-Perot optical cavity with sub-wavelength resolution by perturbing it with a commercially available scanning near-field optical microscope (SNOM) tip. The method is applied to a fiber Fabry-Perot microcavity. We demonstrate its use to determine the relative position of the antinodes at two different wavelengths. In addition, we use the SNOM tip as a point-like source allowing precise positioning of a microscope objective with respect to the cavity mode.

中文翻译：

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用锥形光纤绘制开放式法布里-珀罗腔的光学驻波

我们描述了一种通过用市售的扫描近场光学显微镜 (SNOM) 尖端对其进行扰动来绘制具有亚波长分辨率的 Fabry-Perot 光学腔内的驻波图案的方法。该方法应用于光纤法布里-珀罗微腔。我们演示了它在两个不同波长下确定波腹相对位置的用途。此外，我们使用 SNOM 尖端作为点状源，允许相对于腔模式精确定位显微镜物镜。