Nitrogen lasers: Optical devices of variable gain coefficient

Hariri, A.; Jaberi, M.; Ghoreyshi, S.

doi:10.1016/j.optcom.2008.03.055

Cited by 22 publications

(14 citation statements)

References 16 publications

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“…But it seems that justEqs(7a) and also (8a) are in good agreement withmeasurement and results that are available based on studies that had been done on N-2laser parametersobservations are indicating [8] that k is a positive number and is less than 1. In fig .1 .we have shown the behavior of Ž and Ž d vs. [ 8].…”

Section: One Dimensional Modelsupporting

confidence: 81%

“…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.…”

Section: Pumping Mechanism For a Nitrogen Lasermentioning

confidence: 99%

“…plot (b) shows Ž d reduces as l "… † increases and it's a negative value , so it will be ignored simplyfor amplifiers of long electrode lengths, which are usually used in any laser laboratory, we can apply [8] and Data 2 deduced from [7].…”

Section: One Dimensional Modelmentioning

confidence: 99%

“…As we have an accurate relation for the overall effective cavity photon lifetime, with applying the corresponding relation and by using of experimental parameter deduced from [8] [7] (labeled data 2), we can draw profilecorresponding to use of second term appeared in the left side of Eq. (13).…”

Section: Fig4 Three Dimensional Profile Of the Inverse Of Effective mentioning

confidence: 99%

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

Hosseinimotlagh¹

2014

Optics

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Abstract:Since one of the most valuable measurable parameters in laser, called effective cavity lifetime , gives useful information about laser, this paper aims to study the description of it dependency, , on geometrical characteristics of N 2 -laser, electrodes length and amplifier gap separation. First based on the studies carried out on it , an oscillator-amplifier laser is used which operates under moderate current density conditions; Then in order to obtain a theoretical relation for effective cavity lifetime and to demonstrate the mentioned dependency using rate equations, at first a one-dimensional method is used for the photon density. Since the answers of rate equations in an oscillator-amplifier laser are complicated, a single-oscillator based modelis offered to make rate equations simpler. In this model, at first it is supposed that the photon density of inner part of the amplifier could ben ph (z,t)= n ph (0,t) exp (g 0 (z)z), If n ph n ph (z,t), then rate equations are used for this density and since g 0 is a function of z or amplifier electrode length (Z l AMP ), the cavity effective life time is calculated for equivalent oscillator.Then ,Since most of studies carried out in one dimension , so for approaching to more actual system a two -dimensional method is used for the photon density. So, we consider Z andY, which Z is along amplifier electrodes length and Y is along gaps separation. Supposing that Z and Y are independent on the photon density, two independent relations can be considered for the photon density. In this step, 2-dimensional photon density could be regarded as:n ph (z,y,t) = n ph (z,t) n ph (y,t) . and then 2-dimensional effective cavity lifetime amount is obtained as:1 ‫ץ‬ ‫ץ‬ ‫ץ‬ ‫ץ‬ , This relation includes 2 independent values along the electrodes length (Z l AMP ) and gap separation (y d AMP ). It also demonstrates that the obtained 2-dimentional relation represents a perfect schema for lifetime behavior. The results of this calculation are consistent with other reported N2-laser effective cavity lifetime values measured under moderate current density conditions.

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Section: One Dimensional Modelsupporting

confidence: 81%

Section: Pumping Mechanism For a Nitrogen Lasermentioning

confidence: 99%

Section: One Dimensional Modelmentioning

confidence: 99%

Section: Fig4 Three Dimensional Profile Of the Inverse Of Effective mentioning

confidence: 99%

See 2 more Smart Citations

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

Hosseinimotlagh¹

2014

Optics

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show abstract

“…In our previous publications, related to the gain and saturation energy density measurements [17][18][19] it was realized that small signal gain, g 0 , in an amplifier with variable electrode length, l AMP , and different electrode gap separation, d AMP , are l AMP and d AMP dependent [18,19]. For the l AMP dependency it was shown that under a moderate current density laser operation, g 0 can be given by an equation of the form g 0 ¼ m þ n=l AMP , where m and n are constants and have been determined experimentally.…”

Section: Introductionmentioning

confidence: 99%