ATTO SCIENCE is all of optical solutions.
The PD300R-3W is a circular geometry photodiode laser measurement sensor measuring to 3W. It has a 10mm aperture with a removable filter. Without filter, its spectral range is 350 - 1100nm and its power measuring range is 5nW - 100mW. With filter the spectral range is 430nm - 1100nm and the power range is 200µW to 3W. The sensor comes with a 1.5 meter cable for connecting to a meter or PC interface.