Dispersion and anisoplanatic effects from the atmospheric density gradient

James P. Stone; Patrick H. Hu; Jeff A. Goldstone; Kevin E. Jones

doi:10.1117/12.145225

6 June 1993 Dispersion and anisoplanatic effects from the atmospheric density gradient

James P. Stone, Patrick H. Hu, Jeff A. Goldstone, Kevin E. Jones

Proceedings Volume 1871, Intense Laser Beams and Applications; (1993) https://doi.org/10.1117/12.145225
Event: OE/LASE'93: Optics, Electro-Optics, and Laser Applications in Scienceand Engineering, 1993, Los Angeles, CA, United States

Abstract

For large zenith angles, the atmospheric density gradient causes differential refraction of beams at different wavelengths. As a result, the wavefronts of two different lasers differ not only because of diffractive effects but also because of the different pathway through atmospheric turbulence. The anisoplanatic effects of this pathway separation differ from a strict angular divergence of the beams because of the cumulative nature of the refractive bending. Differential equations describing ray trajectories and analytic expressions for piston- tilt removed anisoplanatic degradation will be presented. Analytic results will be compared with predictions of wave optics calculations. Explicit piston and tilt removal make the phase variances a direct measure of the optical quality usable directly to calculate strehls.

Citation Download Citation

James P. Stone, Patrick H. Hu, Jeff A. Goldstone, and Kevin E. Jones "Dispersion and anisoplanatic effects from the atmospheric density gradient", Proc. SPIE 1871, Intense Laser Beams and Applications, (6 June 1993); https://doi.org/10.1117/12.145225

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