Silikon tabanlı çığ fotodiyot ile tek foton algılama

Due to significant advances in quantum technologies, the use of single photon detectors (SPDs) is becoming common in various fields. As a result of the excellent photodetection performance of SPDs, they are used in a wide range of fields, such as quantum cryptography, astronomy, spectroscopy, and medical applications. There is no doubt that improvements in the performance of SPDs will pave the way for new technologies based on quantum information. Over the years, several different types of SPDs have been developed, such as photomultiplier tubes based on vacuum tubes, avalanche photodiodes (APDs) based on semiconductors, or nanowires based on superconducting technology. Any of these technologies have been preferred by evaluating their advantages and disadvantages for the intended applications. At that point, SPDs based on semiconductor technology have many advantages, including low voltage operation, high reliability, simple electronic requirements, and high detection efficiency. In this work, the TO-8 SAP500 series Silicon APD provided by Laser Component was preferred, the driving circuit was designed for visible (VIS) range sensing applications, and all stages of work were explained in detail. This thesis consists of four sections: the general information on SPDs is covered in the first section, the general information on APDs is covered in the second section, the experimental part is covered in the third section, and the results are covered in the last section.