The DL-CS2184A from DenseLight Semiconductors is a Superluminescent Diode with Wavelength 1270 to 1290 nm, Output Power 18 to 20 mW, Bandwidth (FWHM) 35 to 40 nm, Operating Current 350 mA, Forward Voltage 2 V. More details for DL-CS2184A can be seen below.