The 10mW 14-Pin Butterfly Polarization Maintaining DFB Laser Diode, ITU Grid Wavelength is a high-performance optical source designed for DWDM transmission, fiber sensing, and other precision optical systems. It operates at ITU grid wavelengths, with a wide selection range from 1527.22nm to 1610.92nm, making it suitable for various C- and L-band applications. Each laser diode is housed in a hermetically sealed 14-pin butterfly package and integrates a thermoelectric cooler (TEC), thermistor, monitor photodiode, and optical isolator to ensure superior wavelength stability, thermal control, and long-term reliability. The device comes with polarization maintaining (PM) fiber pigtails, providing stable output polarization essential for coherent and polarization-sensitive applications.