The SLD-1550-14DL from Nolatech is a Superluminescent Diode with Wavelength 1510 to 1550 nm, Output Power 0.2 to 5 mW, Bandwidth (FWHM) 30 to 35 nm, Forward Voltage 2.5 V, Forward Current 250 to 400 mA. More details for SLD-1550-14DL can be seen below.