Transmission characteristics measurement system of fiber laser devices in high power density
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State Key Laboratory of Tribology, Center for Photonics and Electronics, Department of Precision Instruments and Mechanology, Tsinghua University, Beijing 100084, China
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Corresponding author:
GONG Ma-li, gongmali@mail.tsinghua.edu.cn
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Received Date:
2008-11-08
Accepted Date:
2008-12-22
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Abstract
In order to improve the measurement accuracy of the transmission characteristics of the parts in high power fiber laser,an automated measurement system of power ratio was designed by means of the dual optical path measuring system with full consideration of the standard transmission measuring methods.The dual optical path measuring system was analyzed.With the measuring system equipped with a microchip solid laser and a unique refractive index matching cladding mode filter,the transmission loss of a double clad fiber laser was measured.In experiment,for a 35m of Yb-doped double cladding fiber its insert loss was 2.645dB at 1064nm and standard deviation is 0.026dB for 100 test data.Moreover,the repeated measurement error was less than 0.07dB proven by the experiments under different conditions.The result is useful to improve the measurement accuracy.
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