The experimental study on 808nm LD end-pumped Nd:YVO_4 laser

摘要

It is discussed that the experimental output profile of 1064 nm beam of a laser diode (LD) end pumped Nd:YVO_4 laser. It shows that the output power is highly dependent on the focusing position of pump light inside Nd:YVO_4 crystal. Given the same beam waist (1mm) and the same cavity length (58mm), the relationship of output profile and the distance between coupling lens and crystal end is analyzed. When the coupling lens is 13mm away from the crystal end and the pump power is 58.8W, the output power is 20.25W. In this condition, the optical to optical conversion efficiency is 34.4%. The ZEM00 mode is acquired and M2 value is below.