Low-pressure axial direction excitation type F 2 laser...

Details Low-pressure axial direction excitation type F 2 laser... Low-pressure axial direction excitation type F 2 laser...

2006-04-04

2006-04-04

Harvey, Minsun Oh (Department: 2828)

Coherent light generators

Particular active media

Gas

C372S055000, C372S057000, C372S060000, C372S061000, C372S087000

Reexamination Certificate

active

07023893

ABSTRACT:
An axial direction excitation type F2laser apparatus comprises a discharge tube consisting of an insulating cylinder and metal electrodes at both ends of thereof, and a reflecting mirror or a transmitting mirror, constituting a resonator, outside the electrodes. A high voltage for pulse discharge is applied to the electrodes from a drive circuit. Total gas pressure in the discharge tube is set in a range between 10 Torr. and 100 Torr., and concentration of F2gas to total gas in the discharge tube is set to be in a range between 0.2% and 2.0%. This low-pressure axial direction excitation type F2laser apparatus having small size and high efficiency can be provided at a low cost.

REFERENCES:
patent: 2002-76489 (2002-03-01), None
patent: 2002-198590 (2002-07-01), None
Yamada et al, High-power discharge-pumped F2 molecular laser, Feb. 13, 1989,Appl.Phys. Lett. 54 (7), pp. 597-599.
El-Osealy et al, Development of VUV F2 lasers excited by longitudinal discharge at very low pressure (40 Torr), Jul. 15-19, 2001, Laser and Electro-Optics,Cleo/Pacific Rim, pp. 28-29.
M.A.M. El-Osealy et al., “Zen-atsu 40Torr de Hasshin suru Dojiku Reiki Shinku Shigai F2Laser”, Dai 53 Kai Laser Kako Gakkai Ronbunshu, 2001. 07, pp. 63-69.
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M.A.M. El-Osealy et al., “Gain characteristics of Longitudinally excited F2lasers”, Optics Communications May 1, 2002, vol. 205, pp. 377-384.
Takuda Ido et al., “Tategata Hoden Reiki Husso Genshi Laser”, Memoirs of Konan University, Jul. 25, 2000, vol. 4 No. 1, pp. 13-20.
M.A.M. El-Osealy et al., “Co-axially excited gas lasers toward vacuum ultra-violet region”, Proceedings of SPII Advanced High-Power Lasers, Nov. 1-5, 1999, pp. 774-779.
M.A.M. El-Osealy et al., “Oscillation and gain characteristics of high power co-axially excited N2gas lasers”, Optics Communications, Jul. 1, 2001, vol. 194, pp. 191-199.
M.A.M. El-Osealy et al., “Longitudinally Excited VUV F2Laser at Total Gas Pressure of 40 Torr”, Jul. 2001, pp. 63-69, with English translation.
M.A.M. El-Osealy et al., Development of VUV F2Lasers Excited by Longitudinal Discharge at Very Low Pressure (40 Torr). CLEO/Pacific Rim 2001 Postdeadline Paper, Jul. 15-19, 2001, WJPD1-2, pp. 28-29.
M.A.M. El-Osealy et al., “Gain characteristics of longitudinally excited F2lasers”, Optics Communications, May 1, 2002, vol. 205, pp. 377-384.
V.N. Ishchenko et al., “High-power efficient vacuum ultraviolet F2laser excited by an electric discharge”, Institute of Heat Physics, Siberian Branch of the Academy of Sciences of the USSR, Novosibirsk, American Institute of Physics May 16, 1986, pp. 707-709.
M. Kakehata et al., “Transient absorption and its influence on energy extraction in a discharge-pumped F2laser”, Department of Electrical Engineering, Faculty of Science and Technology, Keio University, American Institute of Physics, Feb. 1, 1994, pp. 1304-1310.
S.M. Hooker et al., “Influence of Cavity Configuration on the Pulse Energy of a High-Pressure Molecular Fluorine Laser”, University of Oxford, Department of Atomic and Laser Physics, The Clarendon Laboratory, Applied Physics B, 1992, pp. 54-59.
C. Skordoulis et al., “Gain and Saturation Measurements in a Discharge Excited F2Laser Using an Oscillator Amplifier Configuration”, Theoretical and Physical Chemistry Institute, National Hellenic Research Foundation, Applied Physics B , 1990, pp. 141-145.
K. Yamada et al., “High-power discharge-pumped F2molecular laser”, Applied Physics, Feb. 13, 1989, pp. 597-599.
M.A.M. El-Osealy et al., “Oscillation and gain characteristics of longitudinally excited VUV F2laser at 40 Torr total pressure”, Optics Communications, Jun. 15, 2002, pp. 255-259.

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