M2 quality factor measurement without power and wavelength limit based on infrared image technology

被引：0
|
作者：
Wang, Zhao [1 ]
Liao, Lei [1 ]
Xing, Yingbin [1 ]
Luo, Xing [1 ]
Li, Haiqing [1 ]
Li, Jinyan [1 ]
Dai, Nengli [1 ]
机构：
[1] Huazhong Univ Sci & Technol, Wuhan Natl Lab Optoelect, Wuhan, Hubei, Peoples R China
来源：
2017 CONFERENCE ON LASERS AND ELECTRO-OPTICS PACIFIC RIM (CLEO-PR) | 2017年
基金：
中国国家自然科学基金;
关键词：
beam quality M-2; temperature field; infrared thermal imager; LASER-BEAM QUALITY;
D O I：
暂无
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：
We report on a method which can be used on more occasions for measuring the laser beam quality M-2 of light guided by optical fibers based on infrared thermometry. The infrared thermal imager has been used to detect the temperature field of the photothermal sensor which irradiated by fiber laser. Eliminating the error caused by the coefficient of thermal conductivity, by which the temperature field enable us to know the laser beam width in different positions along the direction of laser transmission. With these data, the optical field can be reconstructed. The beam quality M-2 can be received through curve fitting accurately, which agrees with IOS-standard measurements.
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页数：2
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