santec Holdings Corporation develops, manufactures, and sells components for fiber optic telecommunication systems. The company offers optical instruments, including tunable lasers, tunable filters, component testing products, IL/RL meters, polarity testers, switches, optical power meters, attenuators, light sources, launch conditioning, inspection scopes, cable assembly software, interferometers, and adapters, as well as inspection scopes; and optical components, such as liquid crystal on silicon based spatial light modulators, programmable optical filters, power monitor instruments, power monitors, variable attenuators, optical filters, filter chips, and optical submodules. It also provides optical imaging and sensing products, including 3D optical profilers, software and image analysis tools, wafer thickness mapping systems, swept-source OCT systems, and lasers for swept-source OCT and sensing, as well as accessories comprising OCT grade balanced photo detectors, flexible SS-OTC DAQ boards, and OCT grade interferometer modules; and medical devices comprising biometers. The company was formerly known as Santec Corporation and changed its name to santec Holdings Corporation in April 2023. santec Holdings Corporation was incorporated in 1979 and is headquartered in Komaki, Japan.