Study On Array Microchip Lasers Based On Photo - Cemented PPMgOLN

With the development of laser technology, Industry, research institutions and so on all need a lot of various types of laser. as a result of all solid state laser have the advantages of light weight, small volume, high efficiency, good beam quality, good stability and so on. All solid state laser have been widely used in the field of industrial,medical, scientific research, civil and military. Three primary colors are indispensable in the laser display, green light don’t like red light and blue light can be directly emitted by a laser diode, so compact green light source have becoming a hot spot of research. This thesis mainly based on researching of optical bond of Nd:YVO4/PPMgOLN compact array microchip green laser.(1)Using the theory of Second Harmonic Generation analysis of all solid state laser, We have researched the relationship between the output intensity of frequency doubling light and input intensity of fundamental frequency and the relationship between the frequency doubling efficiency and the phase mismatch amount. Starting from the three wave interaction explain the theory of quasi-phase matching.(2)Through the theory of resonator design, we design the laser cavity type. The thermal effect of laser crystal in laser diode end-pumped solid-state laser was researched, we obtained the laser crystal temperature distribution field and the shape variables of laser crystal, and put forward how to compensate the thermal effect of laser crystal. Through simulating the temperature distribution of optical-bonding crystal, we determined the spacing between LD.(3)Experimental research was done on the optical bond of Nd:YVO4/PPMgOLN compact array microchip green laser. Expounded the preparation process and technology of array micro green laser. With end pump, the nolinear crystal(PPMgOLN) reached the best phase matching in 27 ℃ was validated. When pump in1.8 A current, the maximum output power is 225 mW. After three hours of testing,the output power instability is less than 2 %, from 808 nm to 532 nm optical-to-optical conversion efficiency is 19 %.