Experimental Study of High-Energy Laser Diodes Lighting Using Immersion Forced Liquid Cooling Approach

Author : CHIH-NENG HSU (National Chin-Yi University of Technology), Yu-Wei Lin, Chien-Jui Lai

Abstract : The immersion forced liquid cooling approach can effectively and quickly improve the heat transfer and dissipation capacity, and the power usage effectiveness (PUE) can be increased to within 1.01-1.05, indicating that the more energy-saving and the more efficient can solve the electronic cooling system. The heat source of high-energy laser diodes white-light illumination is more concentrated, with a luminous efficiency and energy-saving that is 3 to 6 times higher than LEDs. The relative heat dissipation specifications are more stringent, so it is necessary to design a high-energy laser diodes illumination in a modular form, combined with immersion forced liquid cooling, to achieve a PUE of 1.01. The laser diodes lighting will be exchanged in a portable replacement lamp module form, as the immersion forced liquid cooling and laser diodes white-light illumination body are integrated into a module, which facilitates the convenience of users in repairing and replacing the laser diodes white light illumination. The surface temperature (Tcase) of the fourth and fifth generation laser diodes white-light illumination components (under 50W) must be below the limit of 60℃, and the safe temperature for Tcase is below 55℃. Therefore, air-cooled heat transfer is already the limit, and the immersion forced dielectric liquid cooling mode is needed to have the opportunity to achieve energy saving and high-energy efficiency..

Keywords : Forced Liquid Cooling, High-Energy, Immersion, Laser Diodes.

Conference Name : International Conference on Environmental Heat Transfer and Sustainable Cooling (ICEHTSC - 26)

Conference Place : Osaka, Japan

Conference Date : 7th Sep 2026