The VFLS-1550-B from Connet Laser Technology is a Laser with Wavelength 1535 to 1561 nm, Power Up to 20 W, Output Power (CW) Up to 20 W, Operating Temperature 0 to 35 Degree C, Storage Temperature -40 to 85 Degree C. More details for VFLS-1550-B can be seen below.