Laser Components GmbH developed its Fibercheck-LC test laser to identify breaks in optical fibers and to recognize abnormally high attenuation levels. Similar in appearance to a laser pointer, the device can be attached to the optical fiber with the fitted connector. Its 635-nm wavelength is highly visible to the human eye. The connector is compatible with FC, SC, ST and other connector types with a 2.5-mm ferrule diameter. For a single 9-µm single-mode fiber, the laser power is 0.2 mW.