1 August 2011 A comparative study on thermal lensing characteristics of low (∼500 °C) and high (∼1500 °C) temperature variants of copper vapor laser
Ramakanta Biswal, Govind K. Mishra, Girija S. Purbia, Pravin K. Agrawal, Om Prakash, Sudhir K. Dixit, Jeevan K. Mittal
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Abstract
This paper presents a comparative study on thermal lensing characteristics of a low temperature copper vapor laser (CVL) (LT-CVL as Copper-HBr laser) and a high temperature CVL (HT-CVL as elemental CVL). Interferometric techniques were used to study the combined thermal lens power of active gaseous medium and discharge sealing optical windows as well as that of the optical windows separately at different electrical input powers. As the input power varied from 2.7 to 4.6 kW, the combined thermal lens power varied from −1.4 to +0.94 km−1 for LT-CVL and from +1.4 to +13 km−1 for HT-CVL. The thermal lens power of the windows varied from +3 to +15 km−1 for HT-CVL. On the other hand, for LT-CVL, the thermal lens due to windows was very weak and could not be measured. It was observed that the origin of net thermal lensing mostly resides in the discharge tube windows owing to its higher temperature variation of refractive index as compared to that of gaseous active medium. The weaker thermal lens characteristics of an LT-CVL was attributed to its much lower working temperature and relatively flatter radial gas temperature profile than that of an HT-CVL.
©(2011) Society of Photo-Optical Instrumentation Engineers (SPIE)
Ramakanta Biswal, Govind K. Mishra, Girija S. Purbia, Pravin K. Agrawal, Om Prakash, Sudhir K. Dixit, and Jeevan K. Mittal "A comparative study on thermal lensing characteristics of low (∼500 °C) and high (∼1500 °C) temperature variants of copper vapor laser," Optical Engineering 50(8), 084202 (1 August 2011). https://doi.org/10.1117/1.3609799
Published: 1 August 2011
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Cited by 6 scholarly publications.
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KEYWORDS
Copper vapor lasers

Refractive index

Silica

Copper

Laser applications

Helium neon lasers

Optical engineering

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