Recent advances in silicon based photon counting detectors have lead to the development of a new photon counting module. The detector for the module is fabricated in standard bulk silicon using complementary metal oxide semiconductor (CMOS) processing steps. High quantum efficiency across the visible spectrum combinedwith low timing
jitter (150ps) provide ideal characteristics for photon counting applications. Through careful selection of components and operating conditions, the time-walk, which degrades the timing resolution of silicon photon counting detectors is minimised. The detector module is designed with a microprocessor interface which allows the internal operating characteristics to be optimised depending on the application. This work seeks to provide a overview of current photon counting detectors demonstrate the tradeoffs associated with each detector and present the new detector module demonstrating operation with zero time-walk affect.