1550nm direct modulation optical transmitter with high index and agc function. It adopts high linearity and low chirp dfb laser, max. Output level comes to 10db. Built-in pre-distortion compensation and agc, apc, atc closed loop control, which improves the system index obviously. It can be used in fttx (â?¤10km) of second-grade service area (sub-headend), also can be used in wdm narrow-band multiplexing and ip/qam. Feastures: 1> low chirp, high linearity dfb laser, chirp compensation. 2> advanced front panel with digital display function 3> agc fiber/ rf in, fiber out. 4> dual module rf driver , high efficient laser pre-distortion adjustment. 5> full-automatic omi control, agc & mgc. 6> intuitionistic modulation status display. 7> built-in dual back-up power supply, switch automatically . 8> casing temperature auto-control, ensure the long life of the laser