Diode-pumped cesium vapor laser operated with various hydrocarbon gases and compared with numerical simulation

Masamori Endo; Taro Yamamoto; Fumiaki Yamamoto; Fumio Wani

doi:10.1117/1.OE.57.12.126104

15 December 2018 Diode-pumped cesium vapor laser operated with various hydrocarbon gases and compared with numerical simulation

Masamori Endo, Taro Yamamoto, Fumiaki Yamamoto, Fumio Wani

Author Affiliations +

Optical Engineering, Vol. 57, Issue 12, 126104 (December 2018). https://doi.org/10.1117/1.OE.57.12.126104

Abstract

Cesium diode pumped alkali lasers (DPALs) have been operated using various hydrocarbons (methane, ethane, and propane) and helium as a buffer gas. We find that the optimum partial pressure of hydrocarbons depends on the cross sections of the upper-state mixing reaction, while the maximum output power does not depend on the hydrocarbon species. Because the cross section of the quenching reaction between cesium and these hydrocarbons is significantly smaller than that for the upper-state mixing reaction, no direct measurement of such cross sections has been attempted to date. In this study, we attempted to determine the cross sections with the aid of DPAL simulation. Output power calculations were repeated by varying the quenching cross sections until a reasonable agreement with the experiments was met. The results indicated that the quenching cross sections of methane, ethane, and propane were 0.05 ± 0.03, 0.14 ± 0.04, and 0.23 ± 0.07 Å², respectively. The validity of the results is supported by the fact that the cross section of methane obtained is consistent with that suggested by Yacoby et al. [Opt. Express 26, 17814 (2018)].

Citation Download Citation

Masamori Endo, Taro Yamamoto, Fumiaki Yamamoto, and Fumio Wani "Diode-pumped cesium vapor laser operated with various hydrocarbon gases and compared with numerical simulation," Optical Engineering 57(12), 126104 (15 December 2018). https://doi.org/10.1117/1.OE.57.12.126104

Received: 4 October 2018; Accepted: 27 November 2018; Published: 15 December 2018

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