The rapid advancement of artificial intelligence models has increased the demand for faster, higher-bandwidth data transmission technologies in modern data centers to manage growing data volumes. Fiber optic communication, with its large capacity and low-loss characteristics, has become the preferred transmission method in such environments. At the core of these systems, optical transceiver modules enable photoelectric signal conversion, directly influencing the stability and efficiency of the communication networks. This paper explores the principles underlying 800 Gbit/s optical transceiver modules and evaluates their practical performance through a comprehensive development and testing process. This study first outlines the fundamental components of an 800 Gbit/s optical transceiver module: transmission unit, reception unit, management unit, and digital processing chip. The article then delves into advanced technologies and design strategies implemented to ensure stable performance in high-speed transmission scenarios. The 800 Gbit/s OSFP 2×DR4 optical transceiver module was developed and tested to verify whether its primary performance metrics met the required standards. Results from rigorous testing indicate that the module's main indicators align with anticipated benchmarks, demonstrating the 800 Gbit/s transceiver module's high performance and suitability for contemporary data center demands.