The Laser Crystal Diaries
The Laser Crystal Diaries
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These tables contain only the most typical host crystals; quite a few Other people exist, which happen to be significantly less commonly made use of.
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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。
Furthermore, some overall flexibility is dropped in experiments if a person can't try out absorbers with diverse thickness or doping focus, such as, without exchanging the laser crystal itself.
Which geometry, dopant and doping concentration from the acquire medium are most advantageous depend on a number of elements. The accessible pump resource (type of laser diode or lamp) along with the envisaged pumping arrangement are important factors, but the fabric alone also has some affect. For example, titanium–sapphire lasers ought to be pumped with substantial intensities, for which the form of the transversely cooled rod, operated with fairly compact pump and laser beam diameter, is more acceptable than e.
激光晶体由发光中心和基质晶体两部分组成。大部分激光晶体的发光中心由激活离子构成，激活离子部分取代基质晶体中的阳离子形成掺杂型激光晶体。激活离子成为基质晶体组分的一部分时，则构成自激活激光晶体。
Of course, it is vitally attractive that a supplied crystal good quality is developed constantly, Though various laser layouts might have a unique sensitivity to materials parameters.
The most feasible doping focus can depend strongly about the host material and its fabrication approach.
激光晶体的效率在很大程度上依赖于某些属性，这些属性不仅限于其基本组成。这些特性决定了产生的激光光束的质量和随后的应用。
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。
For quasi-3-degree laser achieve media and even three-stage acquire media, a single usually needs to Restrict the size to a price and that is far too short for economical pump absorption, as reabsorption outcomes would usually spoil the general performance. For facet pumping, more factors arrive into Enjoy; Moreover successful pump absorption, it is crucial to acquire an appropriate spatial condition in the acquire profile.
主体材料中活性离子掺杂物的数量是关键因素。它影响了激光的效率和性能。过低的浓度可能导致低输出，过高的浓度可能导致消光效应，降低晶体的效率。
In 2017, we designed the world’s largest Ti∶sapphire crystal (Φ235 mm), which supported The ten PW laser output of Shanghai Superintense Ultrafast Laser Facility. The event of Yb and Tm doped GdScO3 laser crystals with really extensive emission spectra drives the development of laser diode pumped ultrafast stable-point out lasers. With the increase in pulse Vitality, peak electric power, and repetition amount of stable-condition lasers, laser crystals will produce toward greater sizes, bigger crystal excellent, and controllable get more info essential functionality.
It could be oriented for in close proximity to perpendicular incidence on the laser beam, or at Brewster's angle. It could be fixed in a few sound mount which also acts for a heat sink. Larger crystals are usually employed for side pumping e.g. with superior-electrical power diode bars.
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