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Spatial and Temporal Scales of Active Medium Inhomogeneities in High Power Gas Lasers

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High Power Lasers — Science and Engineering

Part of the book series: NATO ASI Series ((ASHT,volume 7))

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Abstract

High spatial coherense and small angular divergence are the main properties of laser beam wich determine the possibility of focusing on a small target or energy transmission at great distances. The performance of high-power lasers in wich large active medium volumes or flow rates are used depends to a large extent upon the medium optical homogeneity and hence upon its gasdynamic uniformity.

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Abbreviations

x,y,z,ξ,η:

coordinates

l:

geometrical path length

S:

area

v:

velosity

d:

diameter

τ:

time

ρ:

density

k:

specific heats ratio

Ne :

electron density

μ:

dynamic viscosity

G:

gas rate

α:

fuel aboundance coefficient

I:

intensity

W:

energy

k0 :

small signal gain

n:

refraction index

K:

Gladstone-Dale constant

L:

optical path length

ne :

electron gas refraction index

λ:

wave legth

φ:

phase of the light wave

D:

phase dispersion

Dφ :

structural function of phase distribution

Λ:

integral scale of the inhomogeneity

u:

wave function

A:

amplitude of the wave function

B⊥ :

transverse correlation function

γ:

coherence index

ρc :

coherence radius

Γ:

aberration factor

M:

magnification coefficient

δ:

interferention fringe displacement

e0 :

interferention fringe width

V:

contrast of the interferention pattern

ω:

spatial frequency

θ:

divergence angle

ε:

observation axis angle

St:

Strehl tatio

Re:

Reynolds number

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Author information

Authors and Affiliations

  1. Baltic State Technical University, St. Petersburg, Russia

    V. L. Moshkov

Authors
  1. V. L. Moshkov
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Editor information

Editors and Affiliations

  1. Emerging Technologies, Inc., Pittsburgh, Pennsylvania, USA

    Ram Kossowsky

  2. Physics Institute, Czech Academy of Science, Prague, Czech Republic

    Miroslav Jelinek

  3. W.J. Schafer Associates, Inc., Alburquerque, New Mexico, USA

    Robert F. Walter

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© 1996 Springer Science+Business Media Dordrecht

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Moshkov, V.L. (1996). Spatial and Temporal Scales of Active Medium Inhomogeneities in High Power Gas Lasers. In: Kossowsky, R., Jelinek, M., Walter, R.F. (eds) High Power Lasers — Science and Engineering. NATO ASI Series, vol 7. Springer, Dordrecht. https://doi.org/10.1007/978-94-015-8725-9_3

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  • DOI: https://doi.org/10.1007/978-94-015-8725-9_3

  • Publisher Name: Springer, Dordrecht

  • Print ISBN: 978-90-481-4679-6

  • Online ISBN: 978-94-015-8725-9

  • eBook Packages: Springer Book Archive

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