Ultraviolet Source with Repetitive Subnanosecond Kilowatt Pulses

Prydz, S.

doi:10.1364/ao.7.000211

Cited by 22 publications

(5 citation statements)

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“…That is, almost perfect symmetry occurs at 15 torr and an asymmetry of about 2 to 1 in favour of the generator end at 4 torr. These results suggest that the asymmetry reported for certain ASE lasers [l], [4], [5] may be due to non-uniform pumping or unintentional asymmetric feedback or both.…”

Section: R{n3-g3nz/gz) { N + + N-1mentioning

confidence: 80%

“…R is the amplification coefficient per unit population inversion which, for small signals and for Doppler broadening, is given by R 0.94 cL2A3,/8xAv (5) where L is the centre wavelength and AV is the Doppler linewidth of the transition, This form of the rate equations implies that the homogeneous linewidth of spontaneous emission and the linewidth of the stimulated emission are both small compared with the Doppler broadened linewidth of spontaneous emission and that the Doppler lineshape remains unaltered during the laser pulse [ l l ] . It is known experimentally that the linewidth of the stimulated emission from cw amplified spontaneous emission (ASE) lasers varies with the gain of the transition [12-141 and this effect has been studied theoretically [12-171.…”

Section: Rate Equationsmentioning

confidence: 99%

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Calculations of Light Pulses from an Axial-field Nitrogen Laser

Andersson¹,

Tobir

1975

Phys. Scr.

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The rate equations for a travelling-wave model of an axial-field N2 UV-laser are solved numerically including the limiting case of saturation. It is assumed that collisional coupling of the rotational levels is negligible. Thus the laser pulses are computed by superposing the pulses emitted by the different rotational transitions. The computed and measured laser pulses are compared and the pulse timing and shape are satisfactorily predicted. A discrepancy between calculated and measured pulse power arises from uncertainties in the excitation cross-sections for electron impact excitation, in the electron energy distribution and in spurious feedback of the laser pulses. The difference in emission from the two ends of the laser is very sensitive to feedback. Strong variations in population inversion and photon density along the laser tube are predicted. The calculations show that only a part of the gas volume radiates near saturation condition.

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Section: R{n3-g3nz/gz) { N + + N-1mentioning

confidence: 80%

Section: Rate Equationsmentioning

confidence: 99%

Calculations of Light Pulses from an Axial-field Nitrogen Laser

Andersson¹,

Tobir

1975

Phys. Scr.

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“…Diese Grenzstromdichte j* ist eine Funktion des Gasdrucks p und durch Nullsetzen des Nenners von (5. 6 (5.9) Palls die Zusatzbedingung (5.10) fur alle vorkommenden j erfiillt wird, ist (5.9) auch notwendig. Gibt es j , fiir die (5.10) nicht gilt, ist (5.9) zwar hinreichend, aber nicht notwendig.…”

Section: Abb 2 Abhiingigkeit Der Sattigungsiiinge Von Der Stromdichtaunclassified

Zur Anregung und Emission im N₂‐Impulsgaslaser

Gundel

Ross

1974

Annalen der Physik

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“…The higher the current density the shorter is the necessary tube length. Light intensities were measured with a calibrated ITT 4000-S 20 vacuum diode mounted in a housing designed by Ericsson and Lidholt [5]. Tubes of 10, 20, 30, 40, and 50 cm length were tested.…”

Section: Optical Measurementsmentioning

confidence: 99%