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WANG Zhaoying WU Xing 《Chinese Journal of Lasers》2002,11(2):81-83
Using specially coated mirrors, an output energy of 0.97 J at 1.32 μm from a Nd3 : YAG pulse laser is obtained with pumping energy of 66 J. The repetition rate is 1 pulse/sec and the slope efficiency is 1.7%. The repetition rate can be changed from 1 pulse/sec to 10 pulses/sec. 相似文献
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Using specially coated mirrors, an output energy of 0.97 J at 1.32 μm from a Nd3+∶YAG pulse laser is obtained with pumping energy of 66 J. The repetition rate is 1 pulse/sec and the slope efficiency is 1.7%. The repetition rate can be changed from 1 pulse/sec to 10 pulses/sec. 相似文献
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In this paper, the dynamics of coherent laser control of potassium
atoms is studied by using the time-dependent multilevel approach
(TDMA). The calculation results of population transfer are presented
with different laser fields. The results show that the population can
be transferred to target state completely by a specially designed
laser field. 相似文献
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The synthesis of well-defined regular and miktoarm star-branched polymers by a convergent iterative methodology using core-functionalized 3-arm star-branched polymer with 1,1-diphenylethylene (DPE) moiety and a specially designed DPE derivative is described. The methodology involves the following two reaction steps in the entire iterative synthetic sequence: 1) a coupling reaction of a star-branched polymer having an anion at the core with a DPE derivative with two benzyl bromide moieties, 1-{4-[5,5-bis(3-bromomethylphenyl)-7-methylnonyl]phenyl}-1-phenylethylene, and 2) an addition reaction of the resulting core-DPE-functionalized star-branched polymer with sec-BuLi to convert the DPE moiety to a DPE-derived anion. The iterative synthetic sequence including these two reaction steps, 1) and 2), was repeated to successively synthesize star-branched polymers with more arms. Iteration of this synthetic sequence doubled the number of the arms in the star-branched polymer. With this methodology, 6-arm, 12-arm, and 14-arm regular star-branched polystyrenes as well as 6-arm A2B2C2, A4B2, and 12-arm A4B4C4 and A8B4 miktoarm star-branched polymers with well-defined structures have been successfully synthesized. 相似文献
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