Uses the crystal which has strong thermal convergence the diode pumping laser

摘要

(57) Abstract The diode excited laser includes with the resonator mirror and the output coupler, these form the laser resonator which possesses the optical axis. The strong thermal glass lens laser crystal where it has the diameter of TEM₀₀ mode is installed inside the resonator alongside the optical axis of the resonator. Diode pump source supplies the pump beam to the laser crystal inside the laser resonator, and makes the output beam of the diameter which is larger than diameter of TEM₀₀ mode and has made thermal birefringence decrease. Power source supplies electricity to diode pump source. The polarization component open slot stop and can be laid out together inside the resonator. The laser operates well to cover the range of big pump power. Optical slope efficiency of the laser in TEM₀₀ mode is larger than as many as approximately 40%, all efficiency of the laser is larger than as many as approximately 25%. As for the laser crystal which is used ND: YVO₄ is, gain of this material is high, and life of upper suteito is brief. These properties the laser of insensible is designed in the Q switch type laser or the optical feed back, are attractive. As for another material ND: It is YAG. What makes the loss where the technology which rationalizes the spot size of the pump beam originates in thermal birefringence smallest has been ascertained.