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Applied Optics

Applied Optics


  • Editor: Joseph N. Mait
  • Vol. 48, Iss. 18 — Jun. 20, 2009
  • pp: 3337–3343

Theoretical and experimental analysis of the gating performance of a photocathode-gated image tube using a femtosecond laser

Kan Wu, Xinwan Li, Chong Shao, and Jianping Chen  »View Author Affiliations

Applied Optics, Vol. 48, Issue 18, pp. 3337-3343 (2009)

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We study theoretically and experimentally the gating performance of photocathode-gated image tube. A cross-correlation method is proposed to analyze the rising and falling speed and width of the image tube gain. Femtosecond pulses generated by a fiber laser are used as the light source of ultrahigh temporal resolution and trapezoid electrical signals are applied to a photocathode electrode as gating pulses. By adjusting the time delay between the laser pulse and the electrical gating pulse, various acceleration procedures for the photoelectrons generated at the photocathode can be observed. The photoelectrons arriving at the multichannel plate (MCP) with different kinetic energies receive different gain according to Eberhardt’s MCP gain model. The gain profile is obtained by measuring the output light power of the fluorescent screen at the output port of the tube. The theoretical analysis and experimental result show that the shape of the output gain curve of the image tube is deformed and the width is broadened in comparison with the symmetric electrical gating pulse.

© 2009 Optical Society of America

OCIS Codes
(100.4550) Image processing : Correlators
(110.2970) Imaging systems : Image detection systems
(120.1880) Instrumentation, measurement, and metrology : Detection
(320.7100) Ultrafast optics : Ultrafast measurements

ToC Category:
Imaging Systems

Original Manuscript: February 4, 2009
Revised Manuscript: May 1, 2009
Manuscript Accepted: May 26, 2009
Published: June 10, 2009

Kan Wu, Xinwan Li, Chong Shao, and Jianping Chen, "Theoretical and experimental analysis of the gating performance of a photocathode-gated image tube using a femtosecond laser," Appl. Opt. 48, 3337-3343 (2009)

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