An optical module usually consists of an optical transmitting device (TOSA, including a laser), an optical receiving device (ROSA, including a photodetector), functional circuits,main control circuit board (PCBA), housing and optical (electrical) interface and other. An optical module usually consists of an optical transmitting device (TOSA, including a laser), an optical receiving device (ROSA, including a photodetector), functional circuits,main control circuit board (PCBA), housing and optical (electrical) interface and other. The Printed Circuit Board (PCB) at the heart of these modules is no longer a simple substrate but a highly engineered system. Designing and producing these complex PCBs presents formidable challenges, requiring a convergence of disciplines—from high-frequency signal integrity and advanced thermal. The Institute works in the five research fields: Optical Components and Systems, Precision Engineering Components and Systems, Functional Surfaces and Layers, Photonic Sensors and Measuring Systems and Laser Technology. The close links between them make it possible to develop system solutions for. With many decades of experience and comprehensive system expertise, we combine individual components into complex modules and systems. Optics, mechanics, electronics – everything must work together optimally to meet the highest performance demands. Our optical systems are used. As a reliable development and production partner, Jenoptik provides you with optoelectronic assemblies and subsystems, while also assisting with system integration.