The Nonlinear Crystal Diaries
The Nonlinear Crystal Diaries
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Laser modeling and simulation can be employed to reliably ascertain the ideal crystal dimensions, doping density And perhaps values of further parameters.
人造红宝石激光晶体是首次实现激光输出的材料。可用焰熔法、提拉法或助熔剂法生产单晶。用提拉法容易获得大尺寸优质晶体。
The host medium influences strongly the wavelength, bandwidth and transition cross-sections of pump and laser transitions as well as the upper-state life span.
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For quasi-three-level laser achieve media or simply 3-stage acquire media, a person usually really should Restrict the duration to a price which happens to be way too short for economical pump absorption, as reabsorption outcomes would otherwise spoil the performance. For facet pumping, additional concerns occur into Participate in; Other than productive pump absorption, it is important to acquire a suitable spatial condition with the attain profile.
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A significant destruction threshold regarding pulse fluence or peak depth may be critical for high-Strength amplifiers.
These ions empower the crystal to amplify light-weight with the laser wavelength by means of stimulated emission, when Vitality is equipped towards the crystal by way of absorption of pump mild (�?optical pumping
Which geometry, dopant and doping focus in the gain medium are most advantageous depend on various elements. The readily available pump source (variety of laser diode or lamp) as well as the envisaged pumping arrangement are very important variables, but the material itself also has some affect. For example, titanium–sapphire lasers should be pumped with superior intensities, for which the shape of the transversely cooled rod, operated with relatively modest pump and laser beam diameter, is much more ideal than e.
It could be oriented for in the vicinity of perpendicular incidence with the laser beam, or at Brewster's angle. It could be fastened in a few reliable mount which also acts as being a warmth sink. Larger crystals are generally utilized for side pumping e.g. with superior-electric power diode bars.
The most typical laser-active exceptional earth ions and host media together with some regular emission wavelengths are revealed in the subsequent table:
A couple of laser crystal supplies are shown exactly where some saturable absorber product is included for passive Q switching of a laser.
Certainly, it is rather desirable that a offered crystal top quality is created consistently, While various laser designs might have a different sensitivity to material parameters.
There exists a wide range of crystalline media, which may be grouped in accordance to special atomic constituents and crystalline constructions. Some essential teams of crystals are:
蓝宝�?柱面�?球罩 偏振�?棱镜 红外光学元件 反射�?光学窗口 非球面镜 波片 分光�?制造能力
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It is clear that distinct purposes bring on very various necessities on laser gain media. For that reason, a wide variety of different crystals are made use of, and creating the best website preference is essential for constructing lasers with ideal general performance.
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。