An efficient and compact green laser at 523.5 nm was generated by intracavity frequency doubling of a diode end-pumped conductively cooled Q-switched Nd:YLF laser at 1047 nm. With an incident pump pulse energy of 28.6 mJ at 250 Hz repetition rate, pulse energy of 8 mJ was obtained with a pulse width of 10 ns, corresponding to an optical– optical conversion efficiency of 28%. The beam quality factors were Mx2 =1.35,My2 =1.21.
An efficient and compact green laser at 523.5 nm was generated by intracavity frequency doubling of a diode end-pumped conductively cooled Q-switched Nd:YLF laser at 1047 nm. With an incident pump pulse energy of 28.6 mJ at 250 Hz repetition rate, pulse energy of 8 mJ was obtained with a pulse width of 10 ns, corresponding to an optical– optical conversion efficiency of 28%. The beam quality factors were Mx2 =1.35,My2 =1.21.
The performance inspection of focusing optics, such as focusing lens and focusing assemblies, is of great importance in the machining of optical elements, alignment and regular maintenance of optical facilities. Currently, however the interferometric method and the knife-edge method used normally for the measurement of the large-aperture surface have limitations for the test in the large optical equipment. To solve the problems, a scanning Hartmann inspection apparatus based on the Hartmann principle for focusing optics performance test has been developed. In this paper, the experimental setup and test principle are described, experimental results and analysis are given, and the improvement plan further to obtain better test capability is briefly presented in the end.
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