Optical modules are a core component of modern communication technology, widely used in data centers, 5G networks, and optical fiber communications. Optical modules typically consist of optical transmitting components, optical receiving components, laser diode chips (LD), photodetector chips (PD), and other parts. To ensure these devices operate normally under the requirements of high performance, high speed, and high stability, the accuracy and reliability of testing equipment are crucial. ITECH's IT2800 series Graphical Source Measure Unit, with their high precision, high resolution, and high-speed pulse scanning advantages, provide an excellent solution for testing optical modules and their core optoelectronic chips.