期刊
SENSORS AND ACTUATORS A-PHYSICAL
卷 267, 期 -, 页码 70-75出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.sna.2017.10.005
关键词
-
资金
- Welch Foundation [R4925S]
- THORLABS GmbH, within PolySense, a joint-research laboratory
We report on the optical characterization of a compact bow-tie cavity composed of two flat mirrors and two concave mirrors, all having a reflectance >99.99% in the spectral range between 4.8 mu m and 5.3 mu m, mounted in a stainless-steel enclosure. The cavity was designed for the implementation of an intracavity-quartz enhanced photoacoustic sensor system. The propagation parameters of the intra-cavity beam were determined using the ABCD-matrix method, allowing the analytical formulation of the size of two beam waists occurring inside the cavity. A collimated mid-infrared laser beam was optically coupled and mode matched into the bow-tie cavity via a focusing lens. A cavity finesse of 2000 was measured at a pressure of 90 Torr inside the cavity, corresponding to an optical power enhancement factor of (C) 2017 Elsevier B.V. All rights reserved.
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