Lasers and Laser Optics

Study on the purification of hydrogen bromide gas by fractional distillation technique and its effect on improvement of copper–hydrogen bromide laser performance

[+] Author Affiliations
Ramakanta Biswal

Raja Ramanna Centre for Advanced Technology, Laser Systems Engineering Section, Indore 452013, India

Praveen Kumar Agrawal

Raja Ramanna Centre for Advanced Technology, Laser Systems Engineering Section, Indore 452013, India

Sudhir K. Dixit

Raja Ramanna Centre for Advanced Technology, Laser Systems Engineering Section, Indore 452013, India

Shankar V. Nakhe

Raja Ramanna Centre for Advanced Technology, Laser Systems Engineering Section, Indore 452013, India

Opt. Eng. 51(11), 114203 (Nov 01, 2012). doi:10.1117/1.OE.51.11.114203
History: Received August 13, 2012; Revised October 6, 2012; Accepted October 15, 2012
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Abstract.  This paper presents a purification process of hydrogen bromide (HBr) gas by fractional distillation technique and its use for performance enhancement of copper–HBr laser (Cu–HBrL). The residual impurities in HBr were suppressed by a two-step distillation process at temperatures of 196°C and 20°C. The lowering of the impurities was confirmed by comparing the mass spectrograph of the HBr gas before and after distillation, using a quadrupole mass spectrometer. The effect of the purified HBr gas on the performance of Cu–HBrL average output power as well its electrical discharge characteristics were studied. More than 37% improvement in the laser average output power (40 to 55 W) was observed with the use of this distilled HBr gas compared to undistilled gas. The underlying mechanism of the enhancement was analyzed by comparing electrical discharge characteristics in the two cases. The improvement in Cu–HBrL performance with distilled HBr gas was attributed to lowering of bromine and hydrogen concentration, mainly manifested as increased average electrical energy coupling to the discharge. This resulted in increased laser gain as well as gain volume, which were reflected in increases in laser output power and beam diameter.

Figures in this Article
© 2012 Society of Photo-Optical Instrumentation Engineers

Topics

Copper ; Hydrogen ; Lasers ; Bromine

Citation

Ramakanta Biswal ; Praveen Kumar Agrawal ; Sudhir K. Dixit and Shankar V. Nakhe
"Study on the purification of hydrogen bromide gas by fractional distillation technique and its effect on improvement of copper–hydrogen bromide laser performance", Opt. Eng. 51(11), 114203 (Nov 01, 2012). ; http://dx.doi.org/10.1117/1.OE.51.11.114203


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