CLR-SLS-S/M highly stable and portable laser light source is a self-developed instrument which features advanced control technology, high output, ultra low-power operation in accurate fiber optical testing. It can work at 850nm, 1310nm, 1550nm single wavelength, dual-wavelength or tri -wavelength. It can export a variety of modulation frequencies (CW, 270HZ, 1KHZ, 2KHZ). It is widely used in optical communication, optical measurement, optical fiber sensing, and so on.