We propose a novel end-to-end optimization approach for DML systems, incorporating the learning of bias and peak-to-peak modulation current to the optimization of constellation points, pulse shaping and equalization. The 1550 Optical Transmitter is a device that converts electrical signals into optical signals, allowing for long-distance transmission of data. The module integrates a DFB laser with driver bias circuit and TEC temperature stabilization circuit, capable of up to 4 GHz modulation. Featuring a single +12V DC power. ROF-DML series analog wideband direct-modulated optical emission module, using high linear microwave direct-modulated DFB laser (DML), fully transparent working mode, no RF driver amplifier, and integrated automatic power control (APC) and automatic temperature control circuit (ATC), This ensures. At the core of a DML transmitter lies the DML laser, a semiconductor laser that directly modulates its optical output in response to electrical current variations. This direct modulation mechanism distinguishes DML lasers from external modulator (EML) lasers, where the modulation occurs in a. There are two modulation techniques for optical modules, DML and EML, which are briefly introduced in this article.