The Laser Crystal Diaries

The Laser Crystal Diaries

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The most typical laser-active uncommon earth ions and host media together with some common emission wavelengths are shown in the subsequent desk:

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激光晶体是固态激光器的核心。它们是光放大发生的媒介，产生激光束。在这篇全面指南中，我们深入探讨激光晶体的世界。

激光晶体（laser crystal），可将外界提供的能量通过光学谐振腔转化为在空间和时间上相干的具有高度平行性和单色性激光的晶体材料。是晶体激光器的工作物质。

Which geometry, dopant and doping concentration in the achieve medium are most beneficial depend upon numerous variables. The readily available pump resource (variety of laser diode or lamp) as well as envisaged pumping arrangement are crucial variables, but the material alone also has some affect. As an example, titanium–sapphire lasers have to be pumped with superior intensities, for which the form of the transversely cooled rod, operated with somewhat tiny pump and laser beam diameter, is much more suitable than e.

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活性离子在激光晶体内发生的能量跃迁对激光操作至关重要。大多数激光操作都是通过四能级系统原理进行的，确保连续操作并防止浪费的非辐射衰变。

亚稳态寿命也起着重要作用。较长的寿命允许更多的储能和实现粒子数反转的更高潜力，这对激光动作至关重要。

Some laser crystal resources happen to be shown in which some saturable absorber product is incorporated for passive Q switching of a laser.

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For quasi-three-stage laser acquire media as well as a few-degree get media, just one often should limit the duration to a worth which is way too limited for effective pump absorption, as reabsorption effects would or else spoil the effectiveness. For side pumping, extra factors arrive into Engage in; Aside from efficient pump absorption, it's important to acquire a suitable spatial form of the obtain profile.

材料 激光晶体 晶体生长 光学性能 稀土离子 过渡族离子 materials laser crystal crystal progress optical general performance rare earth ions transition team ions 

The medium ought to have a substantial transparency (reduced absorption and scattering) in the wavelength areas of pump and laser radiation, and very good optical homogeneity. To some extent, this will depend on the quality of the fabric, determined by information of the fabrication process.

With that concept, a single will not want an extra saturable absorber crystal, in order that a single could make much more compact Q-switched laser setups with lessen interior parasitic losses. On the other hand, undesired Uncomfortable side effects may additionally happen, such as acquiring unwanted valence states with the concerned ions or Electrical power transfers.

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