Study On Thermal Effect Of Ho:YAG Laser End Pumped By 1.9?m Laser

Ho:YAG crystal is one of the preferred crystals which can produce high-performance 2?m laser wavelength, high power Ho:YAG laser is one of the focal points of the researchach. Thermal effect generated when high-power operation which will make the output beam quality of Ho: YAG laser deteriorates. But about thermal analysis of Ho:YAG is rarely reported, Therefore, to grasp the changes of temperature and thermal effects within the Ho:YAG laser, to promote the development of high-power, efficient Ho:YAG laser, this study is necessary.Theoretically, according to the physical, mechanical and spectral characteristics of Ho:YAG crystal, to build a thermal model, initial conditions, boundary conditions of Ho:YAG laser end pumped by Tm:YLF laser firstly, Then, using MATLAB software to simulate the changes of Ho: YAG crystal heat power density through the Ho:YAG crystal heat conduction equation,so that we can get the variation of Ho:YAG crystal heat power density, and to provide theoretical guidance for the future design and experimental of Ho laser. Using COMSOL to simulate the temperature distribution of Ho:YAG crystal, and simulating thermal focus value with MATLAB software theoretically.Experimental aspects, on the basis of contrastting several thermal focal length measurements, carry out the experimental study of infering Ho:YAG crystal thermal focal length adversely by beam quality. Based on existing laboratory conditions, we set up an experimental station of Ho:YAG laser end pumped by 1.9?m laser, measure the beam quality and divergence angle, adversely release Ho: YAG crystal thermal focal length of 155 mm under the pump power with 1w, thus high power Ho:YAG laser thermal effects can not be ignored.