Study of Geometrical-Dependence of Glow Discharge on Gain Coefficient in a TE-N2 Laser

Hariri, A; Ghoreyshi, S; Rahimian, K

Study of Geometrical-Dependence of Glow Discharge on Gain Coefficient in a TE-N2 Laser

Document Type : Research Paper

Authors

A Hariri

S Ghoreyshi

K Rahimian

Abstract

Based on a set of experiments, using a transversely exited (TE) oscillator-amplifier N₂-laser system (OSC-AMP) with the AMP effective length of 31cm, measurements have been carried out for small signal gain, g₀, and saturation energy density, E_s, for different AMP gap separations. It was found that the gain-value depends on the AMP electrode gap separation, d_AMP and thereby the corresponding gain coefficient dependency on the E/p, T_e, and pd values are introduced. This experiment shows that in addition to laser excitation length dependency of the gain coefficient, the electrode gap-separation is also an important factor for determining the gain-value, where in the present system it is maximized for pd_AMP~55 Torr.cm. In addition, it was found that, regardless of the type of lasers, and their geometrical configurations, the measured E_s-parameter is linearly related to the output energy density, E₀.

Highlights

E. Armandillo and A.J. Kearsley, “High-power nitrogen laser,” Appl. Phys. Lett. 41, 611-613 (1982).
U. Rebhan, J. Hildebrandt, G. Skopp, “A high power N₂-laser of long pulse duration,” Appl. Phys. 23, 341-344 (1980).
C.H. Brito Cruz, V. Loureior, A.D. Tavares, A. Scalabrin, “Characteristics of a wire preionized nitrogen laser with helium as buffer gas,” Appl. Phys. B 35, 131-133 (1984).
K.R. Richwood and A.A. Serafetinides, “Semiconductor preionized nitrogen laser,” Rev. Sci. Instrum. 57, 1299-1302 (1986).
H.K. Law, W.O. Siew, K.K. Tham, T.Y. Tou, “An ultraviolet preonized nitrogen laser switched by parallel spark gaps,” Meas.Sci.Technol.8, 819-812 (1997).
J. Niedbalski, “A simple ultraviolet radiation-triggerd switch with an electric field distortion gap for long-lifetime electrodes,” Rev. Sci. Instrum. 69, 1906-1908 (1998).
E.E. Bergmann, “Coherent uv from a TEA N₂ laser,” Appl. Phys. Lett. 31, 661-663 (1976).
H.M. von Bergmann, “Traveling-wave corona excitation of high-power uv nitrogen lasers operating at gas pressure ranging from 0 to 30 bar,” J.Appl.Phys. 47, 4532-4534 (1976).
A. Hariri, M. Tarkashvand, A. Karami, “Corona-preionized nitrogen laser with variable pulse width,” Rev. Sci. Instrum. 61, 1408-1412 (1990).
J. Niedbalski, “Capacitively coupled discharge as preionization sources in an electrode-dielectrics-screen assembly,” Jpn. J. Appl. Phys. 42, 7354-7360 (2003).

S. Ghoreyshi, K. Rahimian, A. Hariri, “Gain and saturation energy measurements in low pressure longitudinally excited N₂-lasers,” Opt. Commun. 238, 139-149 (2004).
K. Rahimian, S. Ghoreyshi, A. Hariri, “Study of the effect of N₂ laser gas purity and the length of active medium on laser parameters in an oscillator-amplifier N₂-laser system,” J. of Nuclear Sci. and Tech. 34, 15-23 (2005).
K. Rahimian, S. Ghoreyshi, A. Hariri, “Behavioural studies of gain and saturation energy density in a N₂ laser with corona preionization,” Laser Phys. 16, 447-454 (2006).
A. Hariri, M. Tarkashvand, A.H. Farahbod, “Experimental study of an oscillator-amplifier transversely excited molecular nitrogen system,” J. of Nuclear Sci. and Tech. 29, 25-29 (2003).
L.M. Frantz and J.S. Nodvik, “Theory of pulse propagation in a laser amplifier,” J. Appl. Phys. 34, 2346 (1963).
A.A. Serafetinides and G.N. Tsikrikas, “A semiconductively preionized TEA nitrogen oscillator-amplifier laser system,” Opt. Commun. 79, 448-454 (1990).
W.A. Fitzsimmons, L.W. Anderson, C.E. Riedhauser, J.M. Vrtilek, “Experimental and theoretical investigation of the nitrogen laser,” IEEE, J. Quant. Electron, QE-12, 624-633 (1976).
B. Godard, “A simple high-power large-efficency N₂ ultraviolet laser,” IEEE, J. of Quant. Electron. QE-10, 147-153 (1974).

Keywords

Nz-Lasers

Gain and Saturation Energy Measurements

E. Armandillo and A.J. Kearsley, “High-power nitrogen laser,” Appl. Phys. Lett. 41, 611-613 (1982).
U. Rebhan, J. Hildebrandt, G. Skopp, “A high power N₂-laser of long pulse duration,” Appl. Phys. 23, 341-344 (1980).
C.H. Brito Cruz, V. Loureior, A.D. Tavares, A. Scalabrin, “Characteristics of a wire preionized nitrogen laser with helium as buffer gas,” Appl. Phys. B 35, 131-133 (1984).
K.R. Richwood and A.A. Serafetinides, “Semiconductor preionized nitrogen laser,” Rev. Sci. Instrum. 57, 1299-1302 (1986).
H.K. Law, W.O. Siew, K.K. Tham, T.Y. Tou, “An ultraviolet preonized nitrogen laser switched by parallel spark gaps,” Meas.Sci.Technol.8, 819-812 (1997).
J. Niedbalski, “A simple ultraviolet radiation-triggerd switch with an electric field distortion gap for long-lifetime electrodes,” Rev. Sci. Instrum. 69, 1906-1908 (1998).
E.E. Bergmann, “Coherent uv from a TEA N₂ laser,” Appl. Phys. Lett. 31, 661-663 (1976).
H.M. von Bergmann, “Traveling-wave corona excitation of high-power uv nitrogen lasers operating at gas pressure ranging from 0 to 30 bar,” J.Appl.Phys. 47, 4532-4534 (1976).
A. Hariri, M. Tarkashvand, A. Karami, “Corona-preionized nitrogen laser with variable pulse width,” Rev. Sci. Instrum. 61, 1408-1412 (1990).
J. Niedbalski, “Capacitively coupled discharge as preionization sources in an electrode-dielectrics-screen assembly,” Jpn. J. Appl. Phys. 42, 7354-7360 (2003).

S. Ghoreyshi, K. Rahimian, A. Hariri, “Gain and saturation energy measurements in low pressure longitudinally excited N₂-lasers,” Opt. Commun. 238, 139-149 (2004).
K. Rahimian, S. Ghoreyshi, A. Hariri, “Study of the effect of N₂ laser gas purity and the length of active medium on laser parameters in an oscillator-amplifier N₂-laser system,” J. of Nuclear Sci. and Tech. 34, 15-23 (2005).
K. Rahimian, S. Ghoreyshi, A. Hariri, “Behavioural studies of gain and saturation energy density in a N₂ laser with corona preionization,” Laser Phys. 16, 447-454 (2006).
A. Hariri, M. Tarkashvand, A.H. Farahbod, “Experimental study of an oscillator-amplifier transversely excited molecular nitrogen system,” J. of Nuclear Sci. and Tech. 29, 25-29 (2003).
L.M. Frantz and J.S. Nodvik, “Theory of pulse propagation in a laser amplifier,” J. Appl. Phys. 34, 2346 (1963).
A.A. Serafetinides and G.N. Tsikrikas, “A semiconductively preionized TEA nitrogen oscillator-amplifier laser system,” Opt. Commun. 79, 448-454 (1990).
W.A. Fitzsimmons, L.W. Anderson, C.E. Riedhauser, J.M. Vrtilek, “Experimental and theoretical investigation of the nitrogen laser,” IEEE, J. Quant. Electron, QE-12, 624-633 (1976).
B. Godard, “A simple high-power large-efficency N₂ ultraviolet laser,” IEEE, J. of Quant. Electron. QE-10, 147-153 (1974).