The DL-US31034D-FS from DenseLight Semiconductors is a Superluminescent Diode with Wavelength 1280 to 1330 nm, Output Power 0.3 mW, Bandwidth (FWHM) 40 nm, Operating Current 120 mA, Forward Voltage 2 V. More details for DL-US31034D-FS can be seen below.