SHORT TIME-CONSTANT THERMAL SELF-DEFOCUSING OF LASER BEAMS

被引：33

作者：

DABBY, FW

BOYKO, RW

SHANK, CV

WHINNERY, JR

机构：

[1] Department of Electrical Engineering and Comnuter Sciences, Electronics Research Laboratory, University of California, Berkeley, Calif.

来源：

IEEE JOURNAL OF QUANTUM ELECTRONICS | 1969年 / QE 5卷 / 10期

关键词：

D O I：

10.1109/JQE.1969.1075685

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

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. Copyright © 1969 by The Institute of Electrical and Electronics Engineers, Inc.

引用

页码：516 / &

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