TRANSVERSE-MODE ANALYSIS OF A LASER-BEAM BY NEAR-FIELD AND FAR-FIELD INTENSITY MEASUREMENTS

被引：42
|
作者：
CUTOLO, A [1 ]
ISERNIA, T [1 ]
IZZO, I [1 ]
PIERRI, R [1 ]
ZENI, L [1 ]
机构：
[1] UNIV NAPLES 2,AVERSA,ITALY
来源：
APPLIED OPTICS | 1995年 / 34卷 / 34期
关键词：
D O I：
10.1364/AO.34.007974
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
A quantitative measurement of laser-beam quality can be performed by determination of the presence of multiple transverse modes of the laser oscillator and by calculation of their power content. Along this line of argument, we discuss a new approach that, starting from near-field and far-field intensity measurements, can evaluate the complex excitation coefficients of the transverse modes in a laser beam. The exploitation of near-field measurements sharply improves the performances of the technique in those cases in which only far-field measurements are used. The validity of the method is confirmed by several accurate numerical simulations and by some experimental results relative to a multimode Q-switched Nd:YAG laser. (C) 1995 Optical Society of America
引用
收藏
页码：7974 / 7978
页数：5
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