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TANG LING1, ZHITAO PENG1, NAN LIU1, ZHAO DANG1,* , HUA LIU1, JI CHEN1, LINGFANG WANG1, XIA HUANG1, CHAO WANG1, NA XIE1, KEHONG LI1, ZHIHONG SUN1, JINGQIN SU1
Linearity of laser energy measuring is necessary for high laser power facility used for Inertial Confinement Fusion (ICF) approach because of power balance among beams. Due to large dynamic range and high sensitivity, pyro electric detector is the only option. However, the linearity of the measuring is hard to obtain d ue to high responding speed and response ration’s variation. Therefore, in this paper, the temporal characteristics of pyro electric detectors to laser pulse, sensitivity ratio’s variance to different energy are studied. RC filtering and high speed AD are adopted to shield the electr o magnetic interference and to capture the real amplitude of the output curve, respectively . Least square fit ting is introduced to correct the response ration’s variation. The experimental resul ts show that, by correcting the factors leading to nonlinearity in the measuring, a linearity of 9 9.26 % is obtained @5 mJ~ 350 m J with a measuring sensitivity of no less than 1 m V/mJ. And they perform well at Pre Amplifier Diagnostics Package in SG III facility..
Large aperture laser energy measuring, Pyro electric material, Linearity increasing.
TANG LING, ZHITAO PENG, NAN LIU, ZHAO DANG, HUA LIU, JI CHEN, LINGFANG WANG, XIA HUANG, CHAO WANG, NA XIE, KEHONG LI, ZHIHONG SUN, JINGQIN SU, Linearity achieving of high sensitivity laser energy measurement at pre-amplifier system in SG-III laser facility, Optoelectronics and Advanced Materials - Rapid Communications, 11, 9-10, September-October 2017, pp.499-504 (2017).
Submitted at: May 17, 2016
Accepted at: Oct. 10, 2017
Optoelectronics and Advanced Materials - Rapid Communications
(2023): 0.5 - 2023 Journal Citation Reports (Clarivate Analytics, 2024)
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