Laser system for testing radiation imaging detector circuits

Weronika Zubrzycka; Krzysztof Kasinski

doi:10.1117/12.2205152

11 September 2015 Laser system for testing radiation imaging detector circuits

Weronika Zubrzycka, Krzysztof Kasinski

Proceedings Volume 9662, Photonics Applications in Astronomy, Communications, Industry, and High-Energy Physics Experiments 2015; 96622H (2015) https://doi.org/10.1117/12.2205152
Event: XXXVI Symposium on Photonics Applications in Astronomy, Communications, Industry, and High-Energy Physics Experiments (Wilga 2015), 2015, Wilga, Poland

Abstract

Performance and functionality of radiation imaging detector circuits in charge and position measurement systems need to meet tight requirements. It is therefore necessary to thoroughly test sensors as well as read-out electronics. The major disadvantages of using radioactive sources or particle beams for testing are high financial expenses and limited accessibility. As an alternative short pulses of well-focused laser beam are often used for preliminary tests. There are number of laser-based devices available on the market, but very often their applicability in this field is limited. This paper describes concept, design and validation of laser system for testing silicon sensor based radiation imaging detector circuits. The emphasis is put on keeping overall costs low while achieving all required goals: mobility, flexible parameters, remote control and possibility of carrying out automated tests. The main part of the developed device is an optical pick-up unit (OPU) used in optical disc drives. The hardware includes FPGA-controlled circuits for laser positioning in 2 dimensions (horizontal and vertical), precision timing (frequency and number) and amplitude (diode current) of short ns-scale (3.2 ns) light pulses. The system is controlled via USB interface by a dedicated LabVIEW-based application enabling full manual or semi-automated test procedures.

Citation Download Citation

Weronika Zubrzycka and Krzysztof Kasinski "Laser system for testing radiation imaging detector circuits", Proc. SPIE 9662, Photonics Applications in Astronomy, Communications, Industry, and High-Energy Physics Experiments 2015, 96622H (11 September 2015); https://doi.org/10.1117/12.2205152

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KEYWORDS

Sensors

Semiconductor lasers

Imaging systems

Field programmable gate arrays

Laser systems engineering

Image sensors

Electronics

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