An Unbiased View of Laser Crystal
An Unbiased View of Laser Crystal
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Various crystalline materials are incredibly different regarding their hardness and also other properties, which establish with which methods And the way conveniently they can be Minimize and polished with top quality.
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 far more than just a method to repair the laser-Lively ions at specific positions in House. A number of Attributes of your host material are very important:
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。
For quasi-a few-stage laser obtain media or perhaps a few-amount achieve media, one particular usually has to Restrict the length to a price that's way too brief for productive pump absorption, as reabsorption consequences would otherwise spoil the effectiveness. For facet pumping, extra issues arrive into Participate in; Apart from efficient pump absorption, it's important to acquire an appropriate spatial shape of the obtain profile.
g. a skinny disk. As One more instance, Q-switched lasers attain a higher inhabitants density inside the higher laser level and therefore are for that reason extra sensitive to quenching effects and Strength transfer processes; hence, a reduced doping density is often suitable for these units. For high-power lasers, decreased doping densities will often be accustomed to limit the density of heat generation, Even though thin-disk lasers do the job ideal with highly doped crystals. Numerous laser products and solutions usually do not get to the whole performance potential because these aspects have not been correctly labored out.
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A higher problems threshold regarding pulse fluence or peak depth is often crucial for top-Strength amplifiers.
These ions allow the crystal to amplify gentle in the laser wavelength by using stimulated emission, when Electrical power is provided towards the crystal by using absorption of pump mild (�?optical pumping
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It may be oriented for in the vicinity of perpendicular incidence in the laser beam, or at Brewster's angle. It can be mounted in some sound mount which also functions for a heat sink. More substantial crystals tend to be employed for aspect pumping e.g. with large-electrical power diode bars.
The most typical laser-Energetic uncommon earth ions and host media along with some standard emission wavelengths are revealed in the subsequent table:
A handful of laser crystal elements are demonstrated where by some saturable absorber content is incorporated for passive Q switching of the laser.
Obviously, it's very desirable that a specified crystal quality is manufactured continuously, Whilst distinctive laser styles can have another sensitivity to content parameters.
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。
With That idea, 1 won't require an extra saturable absorber crystal, making sure that one particular may well make extra compact Q-switched laser setups with lower internal parasitic losses. Nevertheless, unwanted Unwanted effects may arise, such as obtaining undesired valence states on the concerned ions or Vitality transfers.
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It is clear that different programs lead to quite various requirements on laser achieve media. For this reason, a wide range of various crystals are applied, and generating the right selection is essential for constructing lasers with optimum efficiency.
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。