Optics and Precision Engineering, Volume. 21, Issue 6, 1417(2013)
Photoelectric-calorimetric compound beam profile detector for near-infrared high energy laser
To measure the beam profile and power density distribution of a far field target in high energy system performance evaluation, a high energy laser detection method is proposed by combining photoelectric and calorimetric methods. In the method, the total energy of incident laser is measured by an absorber and the spatial and temporal distribution of laser profile measured by a photoelectric detector. The detector is developed, which is consisted of a graphite calorimeter, an InGaAs photoelectric detector array, a temperature and voltage amplifier, an analog to digital converter and a signal processor. The system with an effective sensitive area of 22 cm×22 cm can offer a spatial resolution of 1.1 cm,a temporal resolution of 20 ms,and a low energy measurement uncertainty less than 10%.With the higher temporal resolution and lower energy measurement uncertainty,the system is suitable for high energy and large area near-infrared laser beam measurement.It has been used in field experiments successfully.
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FENG Guo-bin, YANG Peng-ling, WANG Zhen-bao, WANG Qun-shu. Photoelectric-calorimetric compound beam profile detector for near-infrared high energy laser[J]. Optics and Precision Engineering, 2013, 21(6): 1417
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Received: Feb. 21, 2013
Accepted: --
Published Online: Jul. 1, 2013
The Author Email: Guo-bin FENG (fgb02@163.com)