The FSLD-825-50 from Frankfurt Laser Company is a Superluminescent Diode with Wavelength 815 to 870 nm, Output Power 40 to 50 mw, Bandwidth (FWHM) 57 to 62 nm(Spectral Width), Forward Voltage 3 V, Forward Current 300 to 350 mA. More details for FSLD-825-50 can be seen below.