The optimization of preionization and the temporal behavior of stimulated uv emission of an N2 laser

Tsui, K. H.; Pimentel, N.P.; Castro, P.P. de; Massone, C. A.

doi:10.1016/0030-4018(92)90360-4

Cited by 4 publications

(2 citation statements)

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“…Recently, studies in matching plasma impedances of the spark gap and laser discharge channels are reported for pulsed nitrogen lasers. [4][5][6] It is noted that the laser pulse width undergoes a resonant narrowing when the impedances are matched in the charging circuit where the plasmas are modeled by an inductance-capacitance (L p ϪC p ) parallel circuit phenomenologically. 4 The frequency response of the charging circuit with such plasma channels has been verified to be compatible with experimental observations.…”

Section: Introductionmentioning

confidence: 99%

“…4 The frequency response of the charging circuit with such plasma channels has been verified to be compatible with experimental observations. 5,6 Since the matching of the plasma impedances generates such effects as to reduce the laser pulse width by a factor of 2, we seek to develop a physical model to better understand such phenomenological L p ϪC p tank circuit. The discharge plasma is described by the fluid equations.…”

Section: Introductionmentioning

confidence: 99%

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Plasma impedance and electron density in a pulsed laser channel

Tsui

Cavalcanti

Farias

et al. 1996

Journal of Applied Physics

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Electron density measurement in a rf helium plasma by lasercollision induced fluorescence methodThe representation of plasma impedance of gas laser discharge and spark gap channels by an inductance-capacitance (L p ϪC p ) tank circuit has been useful in describing the frequency response of a pulsed superradiant laser charging circuit. The impedance matching of these plasma channels can lead to resonant narrowing of the laser pulsewidth in superradiant nitrogen lasers. Using fluid equations to model the electron and ion plasmas, the impedance of plasma channels is formulated. This derived impedance supports the phenomenological L p ϪC p tank circuit configuration, and provides the means to calculate the inductance and capacitance in terms of the plasma density and discharge dimensions. Conjugating this model with the pulse width narrowing via plasma impedance matching, the electron density at the very moment of lasing in a superradiant gas laser channel can be estimated by using the measured L p and C p .

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