Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group

Theoretical aspects of thermal blooming compensation

Not Accessible

Your library or personal account may give you access

Abstract

In this paper we present the theoretical background required for evaluating phase compensation as a technique for reducing the effects of thermal blooming. By using a time-dependent approach for thermal blooming, we can define and evaluate the instantaneous Green’s function for the heated atmosphere. The phase at the mirror is determined by propagating a point source from the focal point to the laser. The effectiveness of this technique is determined by propagating point sources within a diffraction-limited spot to the laser and comparing the resulting phase to the phase of a point source at the focal point. The phase difference will be small and the increase in irradiance large if the heating occurs where geometric optics is valid. The phase difference is large and the increase in irradiance small if atmospheric heating occurs where significant diffractive spreading is also occurring. The resulting gradients lie in the geometric shadow of the aperture and are not accessible to correction by contouring the mirror. Numerical results illustrating the analysis are presented for both cw and pulsed lasers.

© 1977 Optical Society of America

Full Article  |  PDF Article
More Like This
Compensating for thermal blooming of repetitively pulsed lasers

James Wallace and Joseph Pasciak
J. Opt. Soc. Am. 65(11) 1257-1260 (1975)

Multiple-pulse thermal blooming and phase compensation

James R. Dunphy and David C. Smith
J. Opt. Soc. Am. 67(3) 295-298 (1977)

Equivalent thin lens model for thermal blooming compensation

J. A. Fleck and J. R. Morris
Appl. Opt. 17(16) 2575-2579 (1978)

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Figures (7)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Equations (28)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Select as filters


Select Topics Cancel
© Copyright 2024 | Optica Publishing Group. All Rights Reserved