Nonlinear Crystal Options
Nonlinear Crystal Options
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Laser modeling and simulation can be utilized to reliably figure out the the best possible crystal Proportions, doping density And maybe values of added 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 crystal is much more than simply a method to fix the laser-Energetic ions at specified positions in space. Numerous Qualities in the host materials are essential:
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For quasi-three-stage laser gain media as well as a few-level get media, 1 generally needs to limit the size to a price which is also limited for economical pump absorption, as reabsorption results would normally spoil the general performance. For side pumping, added criteria come into Engage in; Moreover efficient pump absorption, it is necessary to get an appropriate spatial form with the attain profile.
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A large problems threshold concerning pulse fluence or peak depth might be critical for prime-Strength amplifiers.
These ions empower the crystal to amplify mild in the laser wavelength via stimulated emission, when energy is equipped to your crystal through absorption of pump light-weight (�?optical pumping
Which geometry, dopant and doping focus on the achieve medium are most advantageous count on numerous aspects. The accessible pump resource (kind of laser diode or lamp) and the envisaged pumping arrangement are essential things, but the material alone also has some influence. One example is, titanium–sapphire lasers need to be pumped with substantial intensities, for which the shape of a transversely cooled rod, operated with fairly smaller pump and laser beam diameter, is more proper than e.
It might be oriented for in close proximity to perpendicular incidence of the laser beam, or at Brewster's angle. It may be preset in certain reliable mount which also functions for a warmth sink. Larger sized crystals are generally employed for aspect pumping e.g. with high-electrical power diode bars.
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A few laser crystal materials have been shown where by some saturable absorber content is integrated for passive Q switching of the laser.
For a variety of good reasons, composite crystals are getting to be preferred. These Have got a spatially various chemical website composition and will be produced with Exclusive styles.
There's a wide array of crystalline media, which may be grouped according to special atomic constituents and crystalline structures. Some vital teams of crystals are:
With that concept, 1 does not will need an extra saturable absorber crystal, making sure that just one may possibly make far more compact Q-switched laser setups with lower inner parasitic losses. Nevertheless, unwelcome Uncomfortable side effects can also take place, such as obtaining unwelcome valence states on the associated ions or energy transfers.
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Laser crystals are optical crystals �?commonly solitary crystals (monocrystalline optical supplies) �?which can be utilised as achieve media for stable-condition lasers. Most often, they are doped with both trivalent rare earth ions or changeover metal ions.
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。