The QDFBLD-1570-5AX from QPhotonics is a Laser Diode with Wavelength 1560 to 1580 nm, Output Power 0.003 to 0.005 W, Output Power (CW) 0.003 to 0.005 W, Threshold Current 7 to 10 mA, Operating Voltage 1 to 1.4 V. More details for QDFBLD-1570-5AX can be seen below.