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Proceedings Paper

Low wavenumber Raman spectroscopy using atomic filters (Conference Presentation)
Author(s): Xiaobo Xue; Corey Janisch; Yizhu Chen; Zhiwen Liu; Jingbiao Chen

Paper Abstract

Low-wavenumber Raman spectroscopy has long been demonstrated as a method of optical characterization in a variety of applications, such as thermal detection and semiconductor analysis. However, accessing low-wavenumber Raman shifts remains a challenge, usually requiring an expensive and complex multi-stage spectrographic system to measure several cm-1 Raman shifts. In this work, we demonstrate a method to measure low-wavenumber Raman shifts down to 1 cm-1 using atomic filters. By using a narrow-band Faraday anomalous dispersion optical filter to remove spontaneous emission noise from the laser cavity and a heated atomic cell as a notch filter to remove the excitation laser, the system is able to measure low Raman shifts (down to 1 cm-1). To demonstrate the capabilities, we measure the broadband Raman spectrum from a silica optical fiber with approximately 0.3 cm-1 resolution, detecting both Stokes and Anti-Stokes Raman shift as low as 0.7 cm-1.

Paper Details

Date Published: 2 November 2016
PDF: 1 pages
Proc. SPIE 9956, Ultrafast Nonlinear Imaging and Spectroscopy IV, 99560C (2 November 2016); doi: 10.1117/12.2238338
Show Author Affiliations
Xiaobo Xue, Peking Univ. (China)
Corey Janisch, The Pennsylvania State Univ. (United States)
Yizhu Chen, The Pennsylvania State Univ. (United States)
Zhiwen Liu, The Pennsylvania State Univ. (United States)
Jingbiao Chen, Peking Univ. (China)

Published in SPIE Proceedings Vol. 9956:
Ultrafast Nonlinear Imaging and Spectroscopy IV
Zhiwen Liu, Editor(s)

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