TY - CHAP A1 - Vinogradov, Juri A1 - Morf, Fabian A1 - Dengler, Simon Andreas A1 - Engelbrecht, Rainer A1 - Ziemann, Olaf T1 - FPGA and APD Based Optical Time Domane Reflectometry in Sensor Applications T2 - The 28th International Conference on Plastic Optical Fibers 2019-11-20 N2 - This paper shows an optical time domain reflectometry (OTDR) system based on an avalanche photodiode (APD) receiver, a 520 nm laser diode transmitter, a high-speed analog-to-digital converter (ADC) and a commercially available field programmable gate array (FPGA). This approach allows OTDR measurements up to 200 m and provides a spatial resolution of 20 cm. Depending on the number of averaging, the measurement time can be between 5 s and 50 s for a range up to 200 m with a good signal to noise ratio. Y1 - 2022 ER -