Conception of a test stand for Silicon Photomultipliers

This thesis treats the conception of a tunable light source as a test stand for silicon pho- tomultipliers. The main element is either a prism or a diffraction grating, used to disperse the light of a LED. A slit can be moved along the created spectrum, selecting a certain wavelength. A reference light source shall be used to calibrate the test stand, but is still in construction, as is the pulsed electronic for the LED. Apart from that, the test stand is working and ready for use. Both the version with the grating and the version with the prism work, even though the grating seems to be the better solution. After introducing some theoretical prerequisites (refraction, diffraction, interference), prism and grating as the two main elements of the test stand are presented in detail. A simula- tion is used to demonstrate how light is dispersed by prisms. After these preparations the positions of the slit can be converted into their respective wavelengths. In a first test measurement, the current in a PIN diode that is attached to the test stand is measured and plotted against the wavelength.