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A simple blue light pulse generator with GaN/SiC light emitting diodes for the time response testing of PMTs



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Antoranz Canales, Pedro and Miranda Pantoja, José Miguel and Fonseca González, Mª Victoria (2005) A simple blue light pulse generator with GaN/SiC light emitting diodes for the time response testing of PMTs. In Photonic Materials, Devices, and Applications. SPIE-Int. Soc. Optical Engineering, pp. 192-200. ISBN 0-8194-5835-X

[thumbnail of Antoranz 03 LIBRE.pdf]

Official URL: http://dx.doi.org/10.1117/12.607853


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.

Item Type:Book Section
Additional Information:

Conference on Photonic Materials, Devices and Applications (2005. Sevilla). © (2005) COPYRIGHT SPIE--The International Society for Optical Engineering.

Uncontrolled Keywords:High QE, Photomultiplier.
Subjects:Sciences > Physics > Electricity
Sciences > Physics > Electronics
Sciences > Physics > Nuclear physics
ID Code:24871
Deposited On:02 Apr 2014 07:34
Last Modified:10 Dec 2018 14:58

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