| Firstly, based on the essential mechanism of Optically Pumped Semiconductor Vertical-External-Cavity Surface-Emitting Lasers(OPS-VECSEL),the thermal effect which impacts its power-scaling is analyzed. Thus a new pump method-hollow beam is proposed in order to solve the problem in this paper. The mechanism of heat generation in VECSEL is analyzed and the finite element analysis model is built. By using the ANSYS finite element software the distribution of temperature and heat flow are given. The comparison of the thermal characteristics of the conventional Gaussian beam pump and hollow-beam-pumped VECSEL analyzed. The results showed that the hollow beam can effectively improve the thermal characteristics of VECSEL. The thermal performance of the hollow beam-pumped VECSEL is better with the same pump power; to achieve the same temperature rise, the hollow beam-pumped VECSEL allows more injection which makes it suitable for high power pump. Hollow beam parameters effecting on the temperature distribution of the device is also obtained, provides a theoretical basis for experimental research. |
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