This paper introduces the simulation of the thermal focal length brought by the Conduction Cooling End-Pumped Slat(CCEPS) laser amplification module under the action of thermal stress. Through simulation analysis, it is found that the thermal focal length of CCEPS lath crystal is affected by two factors, temperature distribution and stress distribution. One of these two factors brings a positive lens effect, the other may bring a negative lens effect, and it may also bring a positive lens effect at the same time. In order to find out the law of thermal lens effect in CCEPS module, a comprehensive simulation analysis of CCEPS module is carried out. This paper provides a strong theoretical support for further experimental verification.
This paper introduces the thermal effect of the slab amplifying module in the high-energy solid-state laser, mainly simulates the influence of the thickness of the metal indium layer on the welding surface of the slab and the heat sink on the thermal effect of the slab, and analyzes the effect of different thicknesses of the indium layer on the thermal effect of the slab. The thickness of the metal indium layer used in the calculation is 10μm, 40μm and 80μm respectively. This paper provides a powerful reference for the engineering application of high-power and high-beam-quality all-solid-state laser systems.
The diffraction-limited multiplier factor β is one of the important indicators for evaluating the energy transfer performance of an optical system. It can reasonably evaluate the beam quality and reflect the actual laser beam energy transfer efficiency and focusability. Starting from the basic concept of β factor, this paper discusses the calculation method of β factor, analyzes the characteristics of β factor, and discusses the engineering application method of β factor based on actual engineering experience, which provides a reference for high-energy laser β factor engineering testing.
This paper introduces a laser amplifier with a non-uniform concentration of ceramic material as a laser gain medium. This gain medium structure prepared by ceramics is a circular thin-disk with a thickness of about 1mm and the size of the cross-section radius(r) is determined by the signal light to be amplified, the pump light absorption efficiency is generally above 96% and the uniformity of the pump light absorption distribution is a predetermined value, such as 96% or higher. The ceramic gain medium of this non-uniformly doped structure adopts a new way to achieve the uniformity of the gain distribution, this way resolves the contradiction between high absorption efficiency and high uniform gain, it is beneficial to realize high-power, high-efficiency and high-beam quality laser output.
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