The SLD-261-MP from Superlum is a Superluminescent Diode with Wavelength 660 to 680 nm, Output Power 0.5 to 2 mW, Bandwidth (FWHM) 6 to 7.5 nm(Spectral Width), Forward Voltage 3 V, Forward Current 160 mA. More details for SLD-261-MP can be seen below.