Temperature controllers and cooling modules are very important parts of any laser devices using diodes. This is due to the fact that the regulation of the operating temperature of the laser diode is crucial for its lifetime. It is necessary to provide a very efficient cooling or a choice of compromise between the life of the diode and the performance of the device. when setting the operating parameters for each professionally used laser system. For the optimal cooling, Opt Lasers offers many types of TEC controllers, cooling modules, and Peltier modules (TEC modules). TEC modules are the heart of most temperature control systems.