Influence of some gaseous additives on gas-discharge parameters and laser performance of a volume-scaled MIR He-SrBr2 laser

An active volume scaling in bore and length of He-SrBr2 laser excited in nanosecond pulsed longitudinal discharge is carried out. The optimal temperature regime is found for laser oscillation at several different Sr atom and ion lines. Optimal discharge conditions, such as active zone diameter, vapor pressure, buffer-gas pressure, electrical excitation scheme parameters, average input power, pulse repetition frequency, are found. At multiline operation a record average output power of 4.30 W for the Sr atom lasers is obtained, more than 90 % of which is concentrated on the 6.45-μm Sr atom line. A new discharge tube with furtherly increased active volume in bore is developed. The effect of neon additive to the helium buffer gas on the gas and electron temperatures is investigated.

[1]  D. N. Astadjov,et al.  Influence on operating characteristics of scaling sealed-off CuBr lasers in active length , 1997 .

[2]  A. Zerrouk,et al.  Sr + excitation and electron temperatures in an Sr + laser , 1992 .

[3]  A. Mcintosh,et al.  Discharge heated longitudinal Sr+ recombination laser , 1986 .

[4]  Richard F. Haglund,et al.  A sealed-off strontium vapor laser , 2004, Atomic and Molecular Pulsed Lasers.

[5]  A V Platonov,et al.  Pulsed strontium vapor laser , 1978 .

[6]  Pan Bai-liang,et al.  A Discharge-Excited SrBr2 Vapour Laser , 2002 .

[7]  H. A. Schwettman,et al.  Mid infrared optical parametric oscillator (OPO) as a viable alternative to tissue ablation with the free electron laser (FEL) , 2007, Lasers in surgery and medicine.

[8]  A. V. D. van der Meer,et al.  Dynamic behavior of photoablation products of corneal tissue in the mid-IR: a study with FELIX , 1999 .

[9]  Krassimir A. Temelkov,et al.  Temperature scaling of a Sr+ recombination laser , 1996, Other Conferences.

[10]  K. Kobe.  The properties of gases and liquids , 1959 .

[11]  Nikola V. Sabotinov,et al.  Copper bromide laser of 120-W average output power , 1997 .

[12]  Nikolay K. Vuchkov,et al.  of the Excitation Circuits on the CuBr Laser Performance , 1994 .

[13]  C. E. Little.  Pulsed Metal Vapour Lasers , 2011 .

[14]  L Reinisch,et al.  Comparison of cortical bone ablations by using infrared laser wavelengths 2.9 to 9.2 μm , 1999, Lasers in surgery and medicine.

[15]  Nikolay K. Vuchkov,et al.  Parametric study of the CuBr laser with hydrogen additives , 1988 .