5 Simple Techniques For Laser Crystal
5 Simple Techniques For Laser Crystal
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The most typical laser-active unusual earth ions and host media together with some standard emission wavelengths are revealed in the next 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。
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Which geometry, dopant and doping concentration with the gain medium are most advantageous depend upon various components. The out there pump source (kind of laser diode or lamp) as well as envisaged pumping arrangement are important elements, but the fabric alone also has some impact. As an example, titanium–sapphire lasers need to be pumped with substantial intensities, for which the shape of the transversely cooled rod, operated with reasonably smaller pump and laser beam diameter, is much more proper 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。
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。
A couple of laser crystal resources are shown wherever some saturable absorber material is incorporated for passive Q switching of a laser.
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-three-level laser obtain media or simply 3-amount get media, one often ought to limit the size to a worth that is much too short for productive pump absorption, as reabsorption results would if not spoil the overall performance. For aspect pumping, added factors occur into play; Other than economical pump absorption, it is crucial to obtain an appropriate spatial shape from the gain profile.
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 advancement optical performance rare earth ions changeover team ions
The medium ought to have a higher transparency (very low absorption and scattering) within the wavelength areas of pump and laser radiation, and fantastic optical homogeneity. To some extent, this depends upon the caliber of the fabric, determined by particulars from the fabrication course of action.
It might be oriented for around perpendicular incidence in the laser beam, or at Brewster's angle. It may be fixed in certain reliable mount which also acts as a warmth sink. Larger sized crystals usually are employed for facet pumping e.g. with substantial-energy diode bars.
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