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Proceedings Paper

A simple blue light pulse generator with GaN/SiC light emitting diodes for the time response testing of PMTs
Author(s): P. Antoranz; F. Lucarelli; M. Asensio; J. M. Miranda; M. V. Fonseca
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Paper Abstract

A simple and cost-effective integrated synthesizer of fast light pulses has been designed, analyzed and tested for the characterization of the time response of photo-multipliers (PMT). This synthesizer consists of an integrated pulse generator based on Schmidt Trigger Inverters, a broadband matching network and a high speed LED. It enables the generation of pulses as short as less than 10 ns with variable pulse width, amplitude and repetition frequency. In order to accurately know the shape of the pulses applied to the PMT under test, a circuital model of the LED has been developed and verified at frequencies up to 2 GHz. This model accounts for the nonlinear behavior of the LED capacitance as well as the package parasitics. The influence of the mismatch at the different frequency components of the synthesized pulse has been investigated. The pulse transmitter has been used to test the time response of MAGIC telescope pixels.

Paper Details

Date Published: 7 July 2005
PDF: 9 pages
Proc. SPIE 5840, Photonic Materials, Devices, and Applications, (7 July 2005); doi: 10.1117/12.607853
Show Author Affiliations
P. Antoranz, Univ. Complutense de Madrid (Spain)
F. Lucarelli, Univ. Complutense de Madrid (Spain)
M. Asensio, Univ. Politecnica de Madrid (Spain)
J. M. Miranda, Univ. Complutense de Madrid (Spain)
M. V. Fonseca, Univ. Complutense de Madrid (Spain)


Published in SPIE Proceedings Vol. 5840:
Photonic Materials, Devices, and Applications
Goncal Badenes; Derek Abbott; Ali Serpenguzel, Editor(s)

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