Box package, single mode or polarization maintaining pigtail fiber output. For OTDR applications, light source applications, etc. Customize specific wavelength DFB lasers. High output power, enhanced high-temperature design, high stability. Specific wavelength DFB lasers for online OTDR, such as 1625/1650/1502/13 83nm. Butterfly or BOX single-mode pigtailed packaging, with pulsed optical power 1 OOm W.