NOYES OLS2-Dual from AFL is a hand-held, rugged laser source designed for performing insertion loss measurements on single-mode fiber optic links when used with an optical power meter. The LASER output is stabilized to ensure accurate test results per current TIA/EIA requirements. Equipped with industry standard 2khz test tone, the OLS2-Dual from AFL is an ideal tool to pair with an optical fiber identifier (OFI-200D) for use in fiber identification. Single-mode output port emits 1310/1550 nm LASER output at CW, WaveID, dual wavelength WaveID, or user selectable Tone.