The diode excited laser device which uses the gain media which possesses strong thermal convergence

摘要

(57) Abstract The diode excited laser has the resonator mirror and the output coupler, stipulates the laser resonator which possesses the optical axis of the resonator. It possesses the diameter of TEM₀₀ mode, it is strong as for gain media of the thermal glass lens from 0.01 there is a range of 0.5% or less. Diode excited source supplies the excited beam to gain media of the laser resonator, creates the output beam of diameter above diameter of TEM₀₀ mode, makes thermal birefringence decrease. Power source supplies electricity to diode excited source. Polarization element is layout possible in the aperture diaphragm and also the resonator. The laser extends to the wide scope of excited electricity and operates well. The slope efficiency of TEM₀₀ mode is 40% or more, it possesses the entire efficiency of 25% or more. As for one of the gain media which is used ND: YVO₄ is. This material has shown the life of briefly high state with high gain. These properties make that attractive, design those which do not react to the Q switch laser or optical feedback. As for another material ND: It is YAG. The technology which optimizes the spot size of the excited beam is discovered in order to make the loss with thermal birefringence smallest.