By Topic

Short time-constant thermal self-defocusing of laser beams

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$33 $13
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

4 Author(s)
F. Dabby ; Dept. of Elec. Engrg. and Computer Sciences and the Elctronics Research Lab., Univ. of California, Berkeley, CA, USA ; R. Boyko ; C. Shank ; J. Whinnery

Time constants as low as 20 μs have been observed when the beam of a helium-neon laser is focused on a small spot on a thin dye sample and the thermal self-defocusing effects observed. The short time constant arises mainly from the small spot size, but to some extent from axial heat flow to the cell ends. The analysis takes into account the axial heat flow, the variation of spot size within the cell, and diffraction defocusing. Agreement between analysis and experiment is good except for cases of the smallest spot sizes, in which case convective turbulence was observed.

Published in:

IEEE Journal of Quantum Electronics  (Volume:5 ,  Issue: 10 )