In the actual packaging of optical modules, aluminum nitride ceramic substrates are mainly used for heat dissipation and support of laser diode chips (LD) and high-power modulators (such as EML). Once the heat dissipation capacity is insufficient, it may cause wavelength drift, output power attenuation, and increase the. TDK's new smart AlN multilayer substrates and packages are shifting the boundaries of high-power devices in terms of power density, heat dissipation, reliability and most compact footprints., EMLs), and their associated driver circuits are highly sensitive to temperature. Designed to support laser diodes, photodetectors, and integrated optical circuits, these substrates provide excellent thermal management, electrical insulation, and. SHINKO Optical Polymer Waveguide supports single-mode transmission. • SHINKO is developing Co-Packaged Optics (CPO) technologies for high-speed, high-bandwidth data transmission with low power consumption. *4 DLL : Direct Laser & Lamination / DLL is registered trademarks of SHINKO ELECTRIC.