Luciol Instruments SA (Luciol) is a private Swiss company, active in fibre optic measurement and instrumentation. Luciol´s core expertise is in photon-counting technology, which enables a new class of Optical Time-Domain Reflectometers. These OTDRs have extremely high spatial resolution, which is impossible to achieve with the standard type of products. Luciol can also develop new optical fiber test equipment for industrial partners.