Influence Of Self-Focusing On Bulk Laser-Induced Damage

M J Soileau; Eric W VanStryland; William E Williams

doi:10.1117/12.944435

27 June 1988 Influence Of Self-Focusing On Bulk Laser-Induced Damage

M J Soileau, Eric W VanStryland, William E Williams

Proceedings Volume 0895, Laser Optics for Intracavity and Extracavity Applications; (1988) https://doi.org/10.1117/12.944435
Event: 1988 Los Angeles Symposium: O-E/LASE '88, 1988, Los Angeles, CA, United States

Abstract

In previous work [1] we reported that the power of importance in self-focusing experiments using Gaussian spatial profile is the second critical power, P₂, defined by P₂=3.77 P₁ rather than the often quoted P₁=Cλ²/(32π²₂). Here n₂ is the nonlinear refractive index, c the speed of light and A the wavelength (both in vacuum). The factor of 3.77 is a numerical factor coming from computer calculations as discussed by Marburger [2]. We also presented a method by which we could obtain n₂ at irradiances very near to damage In addition, we showed the experimental conditions under which self-focusing is unimportant in damage experiments. We have now extended these results so that in damage experiments where self-focusing is important we can estimate the reduced spot size within the bulk at damage and, thus, obtain the damaging electric field magnitude. This we do by observing the far field time integrated spatial irradiance distribution. We present data for Si0₂, NaCl, BK-7, and CS₂.

Citation Download Citation

M J Soileau, Eric W VanStryland, and William E Williams "Influence Of Self-Focusing On Bulk Laser-Induced Damage", Proc. SPIE 0895, Laser Optics for Intracavity and Extracavity Applications, (27 June 1988); https://doi.org/10.1117/12.944435

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KEYWORDS

Laser induced damage

Optical testing

Laser optics

Fused quartz

Numerical analysis

Polarization

Laser damage threshold

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