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Study on pulse transmission delay of Pockels Cell feedforward driving source applied to photon modulation

  • 1.

    Institute of Electrical and Information, Anhui University of Technology, Maanshan 243032, China

  • 2.

    School of Physical Science, University of Science and Technology of China, Hefei 230029, China

Cite this: JUSTC, 2014, 44(4): 278-284
https://doi.org/10.3969/j.issn.0253-2778.2014.04.004
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  • Received Date: October 17, 2013
  • Revised Date: December 26, 2013
  • Accepted Date: December 26, 2013
  • Published Date: April 29, 2014
    Abstract
  • A Pockels Cell feedforward driving source based on DC modulation was proposed, which was applied to photon modulation. Aiming at the scattering effect of distribution parameters on wave propagation in circuit, an equivalent model circuit was built to simulate the pulse wave transmission in circuit and the influence of the scattering effect of distributed parameters on the triggered flow of the power switching device was analyzed. It was found that the scattering effect of distributed parameters on the switching drive signal resulted in a slower front edge of the drive pulse, which prolonged the triggered flow delay of the power switching device and increased the rising edge of the power pulse, thus increasing the delay time of pulse transmission. Some methods, including driving circuit improvement, circuit wiring optimization, and augment of an LC network matching circuit, were adopted to improve drive pulse transmission time delay. Experiment results indicate the pulse transmission delay of the improved circuit dropped remarkably from 300 ns to 100 ns in comparison with the original circuit.
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