Compact high energy Nd:YAG laser with direct liquid cooling for portable systems

For portable spectroscopic systems, there is a high demand for smaller and economical laser modules. Heat management is essential in high-energy laser systems, but the "classic" external cooling methods are increasing the overall size of the laser. To avoid this problem, we implemented a "static", non-circulated liquid cooling system. The laser cavity is hermetically sealed after it is filled up with liquid, no external liquid container is necessary. In this work, we present the development of a compact, low price, high energy Q-Switched Nd:YAG laser using commercially available components.