The 0.2-2mw 1310nm FP pigtailed laser diode module plug in type is provided in a coaxial plug-in package. It also uses a Fabry–Pérot cavity,which means it features a low threshold and operating current.In addition, the device can be supplied with an SC,ST,or FC connector. It is commonly used in handheld and desktop light sources,optical multi-meters, and communication test equipment.