Sihao Pi, Tao Wu, Xinxin Feng, Hongda Yan, Chenwen Ye, Xingdao He
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Abstract
We report on a novel, to the best of our knowledge, method for rapid measurements of Rayleigh-Brillouin scattering (RBS) profiles in air at low temperatures and low pressures, using a spectrometer based on a virtually imaged phased array (VIPA). RBS profiles were measured over a temperature range of 213-293 K and a pressure range of 343-996 mbar. The Tenti S6 model was used to fit profiles and retrieve gas temperatures. The calculated root mean square error (RMSE) for the spectral fitting curve was less than 3.23%, while the absolute error of retrieved temperatures was less than 2.44 K with an acquisition time of 2 s per profile. These results confirm the viability of using a VIPA-based spectrometer for rapid RBS profile measurements at low temperature and low pressure, with potential application to atmospheric measurements.
期刊介绍：
The Optical Society (OSA) publishes high-quality, peer-reviewed articles in its portfolio of journals, which serve the full breadth of the optics and photonics community.
Optics Letters offers rapid dissemination of new results in all areas of optics with short, original, peer-reviewed communications. Optics Letters covers the latest research in optical science, including optical measurements, optical components and devices, atmospheric optics, biomedical optics, Fourier optics, integrated optics, optical processing, optoelectronics, lasers, nonlinear optics, optical storage and holography, optical coherence, polarization, quantum electronics, ultrafast optical phenomena, photonic crystals, and fiber optics. Criteria used in determining acceptability of contributions include newsworthiness to a substantial part of the optics community and the effect of rapid publication on the research of others. This journal, published twice each month, is where readers look for the latest discoveries in optics.
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