BLS3201 Series Bench-top Light Source is specially designed for PLC coupling procedure. It has 2 output ports, which is compatible with 1xN and 2xN chips. Each output port can switch light source between 1310nm and 650nm for guide and precision alignment. It avoids the repeatedly plug in or out when test the 2xN chips and ensure the output power of each channel equal to improve the efficiency and performance. Features 1. Good wavelength stability 2. Switch between 1310nm and 650nm 3. Adjustable output of 650nm light source 4. High quality red light spot