Laser Crystal Secrets
Laser Crystal Secrets
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激光晶体的极化性能可能会影响输出激光束的质量和特性。有些激光晶体产生线性偏振光，这对某些应用可能有益。
为了使激光器有效运作，需要有效管理运行过程中产生的热量。具有良好热导率的激光晶体可以更有效地散热，防止热透镜效应或断裂。
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The host medium influences strongly the wavelength, bandwidth and transition cross-sections of pump and laser transitions as well as the upper-state lifetime.
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A higher area excellent is naturally essential. Technical specs of floor flatness will often be a lot better than . This can help to avoid both of those scattering losses and wavefront distortions that may degrade the laser's beam quality. Also, scratch and dig specifications
g. a skinny disk. As another instance, Q-switched lasers achieve a better populace density in the upper laser degree and so are thus additional delicate to quenching consequences and Electrical power transfer procedures; therefore, a reduce doping density is usually appropriate for these gadgets. For high-energy lasers, reduced doping densities are frequently accustomed to limit the density of warmth technology, While slim-disk lasers operate ideal with hugely doped crystals. Quite a few laser products usually do not get to the complete overall performance potential because these information have not been thoroughly labored out.
The host crystal is far more than simply a means to repair the laser-active ions at sure positions in Room. A number of Homes of your host material are crucial:
量子效率是发射光子数量与吸收光子数量的比率。高量子效率表明更大部分吸收能量被转化为激光光束，有助于提高激光的整体效率。
It is obvious that distinct applications produce very various specifications on laser achieve media. Due to this, a wide vary of various crystals are applied, and creating the appropriate preference is essential for setting up lasers with optimum general performance.
材料 激光晶体 晶体生长 光学性能 稀土离子 过渡族离子 products laser crystal crystal expansion optical efficiency scarce earth ions changeover group ions
The medium must have a superior transparency (low absorption and scattering) from the wavelength regions of pump and laser radiation, and superior optical homogeneity. To some extent, this depends upon the caliber of the material, determined by specifics in the fabrication procedure.
With that concept, one doesn't have to have a further saturable absorber crystal, making sure Laser Crystal that one particular might make more compact Q-switched laser setups with reduced interior parasitic losses. Nonetheless, undesirable Unwanted effects might also arise, for instance obtaining undesirable valence states of your associated ions or Strength transfers.
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