Characteristics of doubling circuits used in gas laser excitation: application to the N/sub 2/ laser

Nitrogen lasers, optical devices of variable gain coefficient: Theoretical considerations

“…The interest arises due to the fact that N 2 -laser can be easily made, and is a useful optical device in any optical research laboratory. From the theoretical point of view, although many papers have been published on the subject [1][2][3][4][5][6][7][8][9][10], there are many questions that have not been properly answered up to the present years. For example, when the rate equations are used to calculate the output characteristics of the laser, there is an ambiguity for selecting appropriate electron impact-excitation cross-sections from the ground to the upper, C 3 P u , and lower B 3 P g electronic energy levels.…”

“…The voltage waveforms on the C 1 and C 2 sides for each l AMP can be monitored and be used for deducing the relevant parameters of resistance and inductance R i and L i (i = 1 and 2) corresponding to the SG and AMP sections, respectively. The solution to the circuit differential equation is simply obtained by letting I 3 = 0 in the circuit equations (i.e., OSC-opencircuit), and that has already been introduced in the literature [3,9]. Secondly, with the R i , L i measurements and by applying the rate equations, the gain values as well as the output energy extracted from AMP for different AMP lengths are numerically calculated upon using different r C and r B cross-sections appeared in the literature.…”

Determination of Effective Photon Lifetime in Nitrogenic Laser in One and Two Dimension

“…We can apply the rate equations and the equivalent electric-circuit for a single OSC, where the relevant equations for an OSC laser system have been realized in the past [4], and almost in recent years [12]; and also with the proposed model, the approach for the numerical solution to the equations is easily attainable.…”

“…For this purpose it is only needed to use a open-circuit condition of / $ 0 for the OSC section in the OSC-AMP laser system, and the analysis of the waveforms corresponding to charging capacitors of C1 and C2 can be performed without any complications using the relevant equations given in Refs. [14,12].…”

“…On the other hand, for improving the laser beam quality, enhancement of the laser output energy, and reducing the laser beam divergence, designs based on oscillator-amplifier(OSC-AMP) N2-lasers have also been proposed. These include TEA-TEA, TE-TE, and the combined TEA-TE oscillator-amplifier systems [1][2][3][4][5][6][7][8][9][10][11][12]. In a laser system consists of an OSC-AMP, in addition to achieving improvement in laserperformances, it gives also a method of probing the laser output extracted from amplifier as the input energy to the amplifier changes.…”