Study on the dynamic control of spherical aberration on the stable zone of the first three low-order modes of LD end-pumped lasers

20 W, 15 ns high-repetition-rate and high-beam- quality MOPA laser by spherical aberration self- compensation at 1342 nm

“…The spherical aberration self-compensation technique is used in the second stage ampli er to obtain high-beam-quality laser output [10][11][12][13] . The design is as follows (as shown in Fig.…”

Dynamic effects of temperature-dependent aberration factors on the beam quality of LD end-pumped lasers

“…This makes the light incident on the thermal lens with different radial coordinates focus differently, that is, the deviation of the peripheral radial coordinate r from the light focus of the paraxial coordinate can be reflected by the aberration factor. According to our previous research, 20) we can approximate the thermal lens by slicing, and slicing the thermal lens into a very large but limited number of slices along the radial coordinate. At this point, each slice has a separate temperature environment, which can be viewed as a thin lens whose thermal conductivity is constant.…”