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

Sarikhani, S.; Hariri, A.

doi:10.1016/j.optcom.2009.09.071

Cited by 16 publications

(19 citation statements)

References 29 publications

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“…Our simulation studies using rateequations with different photon effective life time, give also a gainenhancement upon reducing the electrodes length, as given in Ref. [14]. In the two dimensional approach we have also shown that gain value in N2-lasers can be viewed as a two dimensional coefficientobeying photon density equations in the rate equations.…”

Section: Conclusion and Discussionsupporting

confidence: 52%

“…For our study purposes we consider an oscillator amplifier (Ose-Amp) laser system, Details of theoretical approach including the electric-circuit behavior and the rate equations for an OSC-AMP laser system usinga Blumlein circuit have been reported previously [14]. Briefly In fact, in the theoretical approach it was shown that in an OSC-AMP laser system, where the solution to the relevant equations (i.e.…”

Section: Theoretical Considerationsmentioning

confidence: 99%

“…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].…”

Section: Theoretical Considerationsmentioning

confidence: 99%

“…• F this relation has already been introduce by ChangandTeii [7,14]. For simplifying an OSC-AMP calculation, and byapplying a model base on a single OSC, without considering anymirrors reflectivity and cavity losses, has to be modified.…”

Section: One Dimensional Modelmentioning

confidence: 99%

“…For simplifying an OSC-AMP calculation, and byapplying a model base on a single OSC, without considering anymirrors reflectivity and cavity losses, has to be modified. Theapproach for this modification relies on experimental observations,we can realizethat for short electrode lengths needsto be somehow smaller than • , where • D7• is themaximum power loss and b is a constant and with some approximationit has been determined by the simulation and experiment [14].So with these considerations we can get a new relation for the effective cavity lifetime. Note that because of the term appeared inside the absolute value we have two values for ,…”

Section: One Dimensional Modelmentioning

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: Conclusion and Discussionsupporting

confidence: 52%

Section: Theoretical Considerationsmentioning

confidence: 99%

Section: Theoretical Considerationsmentioning

confidence: 99%

Section: One Dimensional Modelmentioning

confidence: 99%

Section: One Dimensional Modelmentioning

confidence: 99%

See 3 more Smart Citations