Method for Estimating the Thermal Blooming Effect

by Chuan-Chong Chen

Download

Download eBook for Free

FormatFile SizeNotes
PDF file 1.3 MB

Use Adobe Acrobat Reader version 10 or higher for the best experience.

Purchase

Purchase Print Copy

 FormatList Price Price
Add to Cart Paperback62 pages $20.00 $16.00 20% Web Discount

Describes a simple method without the use of codes which has been developed to estimate the thermal blooming of a high-power focused laser beam propagating through an absorbing medium. Continuous wave laser beam propagation through an absorbing medium heats the medium along the path of the beam; the heating of the medium then induces a local change in the index of refraction of the medium which, in turn, causes some effects of spreading, distorting, bending, or defocusing of the beam. These are known as thermal blooming or thermal lensing effects. One important consequence of these effects is to spread the laser beam over a larger area, thereby reducing the intensity incident on a target. The method described in this report permits the approximate estimation of the reduction of laser intensity on the target, but not the detailed intensity pattern caused by the thermal blooming effect.

This report is part of the RAND Corporation Report series. The report was a product of the RAND Corporation from 1948 to 1993 that represented the principal publication documenting and transmitting RAND's major research findings and final research.

This document and trademark(s) contained herein are protected by law. This representation of RAND intellectual property is provided for noncommercial use only. Unauthorized posting of this publication online is prohibited; linking directly to this product page is encouraged. Permission is required from RAND to reproduce, or reuse in another form, any of its research documents for commercial purposes. For information on reprint and reuse permissions, please visit www.rand.org/pubs/permissions.

The RAND Corporation is a nonprofit institution that helps improve policy and decisionmaking through research and analysis. RAND's publications do not necessarily reflect the opinions of its research clients and sponsors.