Coset, Inc. engages in the provision of packaging solutions and services for fiber-coupled laser modules for telecom and industrial applications. Its products include active components such as nine hundred eighty nanometer (980nm) pump laser diode, super light emitting diode (SLED), semiconductor optical amplifier, high power multimode lasers, distributed feedback laser diode, and lensed fibers such as cylindrical type, spherical type, and customized assembly. The company was founded on October 11, 1999 and is headquartered in Gwangju, South Korea.