High-Power Continuous-Wave All-Solid-State Blue And Red Laser

All-solid-state lasers (Laser diode-pumped solid-state lasers) have many advantages, such as compact, efficient, good beam quality, stable and long lifetime et al. With the development of laser technology, they have been widely used in the fields of industry, military, medical treatment and research, and have replaced the traditional gas-laser, dye-laser, and flesh-lame-pumped solid-state laser step by step. During the past a few years high-power, high-efficient, all-solid-state blue and red laser sources have attracted much attention in numerous applications such as in high-density optical data storage, biological and medical diagnostics, colour displays, high-resolution printing, underwater imaging, or underwater communication. Efficient, simple and compact laser sources of simultaneous emissions at multiple wavelengths have also shown lots of application foregrounds in many fields, such as optical communication, photodynamic therapy (PDT), optical calculation, military interaction, environmental monitory, laser remote sensing, laser radar, spectroanalysis, medical instrumentation, and scientific research. The main contents and key creation points of this dissertation are as follows:(1) Generation, influences on laser system, measurement, mitigation and compensation of thermal effects in fiber-diode end-pumped solid-state lasers are theoretically researched in detail. The relationship between the pumping beam quality and thermal effects is numerically analyzed. Moreover some equations describing the temperature distribution in the laser rod and thermal focal length in the condition of poor pumping beam quality are pressed.(2) A new theoretical mode of diode-end-pumped quasi-three-level Nd:YAG laser, in which energy transfer upconversion (ETU) and the beam quality of diode pumping source are considered, is presented. And numerical calculations based on the relationship between energy transfer upconversion, pumping beam quality and gain distribution in laser rod, pump-to-mode size ratio, threshold and laser characteristic are carried out. This is the basic of the high power 946-nm Nd:YAG laser.(3) We experimentally demonstrated a high-power, efficient continuous-wave (cw) diode-end-pumped laser operating at 946nm with a traditional no-composite Nd:YAG rod and a simple plane-concave cavity. At incident pump power of 27.7 W, a maximum output of 8.3W is obtained, showing a slope efficiency of 33.5%. To the best of our knowledge, this is the highest cw output at 946 nm generated by...