Abstract:
We present the development of a transversally excited CO2 laser that operates at pressures up to 200 kPa and 50 Hz repetition rate. The laser has been designed to trigger photo-chemical reactions. We perform a detailed study of the well-known system of capacitive transfer to exploit its virtues and avoid the use of complex system of greater cost and lower reliability. We developed a simple method to reduce the inductance of the outer circuit, thus obtaining a shorter pump pulse with fewer shots that go into the arc regime. The feeding scheme also insures a more uniform current distribution. In addition, we implemented a numerical model that simulates the discharge, considering a novel treatment of the non-linear discharge resistance. The results of this model allow optimizing the efficiency of the laser. We obtained reliable operation with pulses of ≈ 85 ns FWHM and peak power higher than 45 MW) that selectively initiate photo-dissociation reactions in the spectral range from 9 to 11 μm. © 2014 IEEE.
Registro:
| Documento: |
Conferencia
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| Título: | High repetition rate laser at supra-atmospheric pressure for selective photo-dissociation |
| Autor: | Tarnapolsky, I.; Rios, I.; Gonzalez, M.; Santiago, G. |
| Ciudad: | San Carlos de Bariloche |
| Filiación: | INVAP SE, Av. Cmte. Luis Piedrabuena 4950, R8403CPV, San Carlos de Bariloche, Río Negro, Argentina
Grupo de Láser, Óptica de Materiales y Aplicaciones Electromagnéticas (GLOMAE), Departamento de Física, Universidad de Buenos Aires, Paseo Colón 850, C1063ACV, Buenos Aires, Argentina
Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Argentina
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| Palabras clave: | Atmospheric pressure; Carbon dioxide; Dissociation; Discharge resistance; Feeding scheme; High repetition rate lasers; Reliable operation; Repetition rate; SIMPLE method; Spectral range; Uniform current distribution; Optical pumping |
| Año: | 2014
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| Página de inicio: | 576
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| Página de fin: | 581
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| DOI: |
http://dx.doi.org/10.1109/ARGENCON.2014.6868553 |
| Título revista: | 2nd IEEE Biennial Congress of Argentina, ARGENCON 2014
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| Título revista abreviado: | IEEE Bienn. Congr. Argentina, ARGENCON
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| Registro: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_97814799_v_n_p576_Tarnapolsky |
Referencias:
- (2013), http://www.sdilasers.com/lasers/co2-lasers.php; Smith, K., Thomson, R., (1978) Computer Modeling of Gas Lasers, , Plenum Press
- Rothea, J., Liub, F., Hortonc, R., Evansc, R., Hwangc, D.Q., Spatialdependent simulation of TEA CO2 lasers (2014) Optik - International Journal for Light and Electron Optics, 125, pp. 1756-1760
- Papadopoulos, A., Serafetinides, A., Characteristics of doubling circuits used in gas laser excitation - Application study of N2 laser (1990) IEEE Journal Quantum. Electron, 26, pp. 177-181
- Papadopoulos, A., Serafetinides, A., Investigation of the electrical characteristics of charge transfer circuits used in gas laser excitation (1991) J. Phys. D: Appl. Phys, 24, pp. 1917-1922
- Kumar, M., Khare, J., Gupta, C., Nath, A., Theoretical and experimental study of v - I characteristics of UV pre-ionized TEA CO2 laser for variety of laser gas mixtures (2007) Opt. and Laser Tech, 39, pp. 129-135
- Lowke, J., Phelps, A., Irwin, B., Predicted electron transport coefficients and operating characteristics of CO2:N2:He lasers (1973) J. Appl. Phys, 44, p. 10
- Kumar, K., Nath, M., (2002) Proceedings of National Laser Symposium, pp. 62-64. , Thiruvananthapuram, India
- Nighan, W., Wiegand, W., Electron energy distributions and collisions rates in electrically excited N2;CO and CO2 (1974) Phys. Rev. A, 10, p. 922
- Nighan, W., Influence of recombination and ion chemistry on the stability of externally sustaines molecular discharges (1977) Phys. Rev. A, 16, p. 1209A4 - Aerolineas Argentinas; et al.; IEEE Argentina; National Scientific and Technical Research Council (CONICET); National University of Rio Negro; U.N.L.P. (Fi)
Citas:
---------- APA ----------
Tarnapolsky, I., Rios, I., Gonzalez, M. & Santiago, G.
(2014)
. High repetition rate laser at supra-atmospheric pressure for selective photo-dissociation . 2nd IEEE Biennial Congress of Argentina, ARGENCON 2014, 576-581.
http://dx.doi.org/10.1109/ARGENCON.2014.6868553---------- CHICAGO ----------
Tarnapolsky, I., Rios, I., Gonzalez, M., Santiago, G.
"High repetition rate laser at supra-atmospheric pressure for selective photo-dissociation "
. 2nd IEEE Biennial Congress of Argentina, ARGENCON 2014
(2014) : 576-581.
http://dx.doi.org/10.1109/ARGENCON.2014.6868553---------- MLA ----------
Tarnapolsky, I., Rios, I., Gonzalez, M., Santiago, G.
"High repetition rate laser at supra-atmospheric pressure for selective photo-dissociation "
. 2nd IEEE Biennial Congress of Argentina, ARGENCON 2014, 2014, pp. 576-581.
http://dx.doi.org/10.1109/ARGENCON.2014.6868553---------- VANCOUVER ----------
Tarnapolsky, I., Rios, I., Gonzalez, M., Santiago, G. High repetition rate laser at supra-atmospheric pressure for selective photo-dissociation . IEEE Bienn. Congr. Argentina, ARGENCON. 2014:576-581.
http://dx.doi.org/10.1109/ARGENCON.2014.6868553