The Laser Crystal Diaries
The Laser Crystal Diaries
Blog Article
Visible sound-condition lasers based on laser crystals are compact and lightweight. Lasers from deep purple to blue are already reported. Particularly, there have been plenty of experiences on Pr3+ doped laser crystals, and constant wave lasers about 490 nm happen to be accomplished. Ti∶sapphire is the main gain crystal for ultrafast lasers. Superintense ultrafast lasers with peak ability ranging from various hundred terawatts to 10 petawatts require superior-high-quality and large-sized Ti∶sapphire crystal. The origin of defect relevant optical absorption in Ti∶sapphire and The expansion of large-sized higher-high-quality crystals are two crucial challenges that urgently have to be tackled. In recent times, we analyzed the system of defect connected optical absorption in Ti∶sapphire theoretically, and grew big-sized higher-high-quality crystals by way of heat exchange process. The primary activating ions for one μm laser crystals are Nd3+ and Yb3+. Nd∶YAG would be the most widely used laser crystal. Lately, we explored many new Nd3+ doped fluoride and oxide laser crystals, and solved the emission cross segment problem of Nd∶Lu3Al5O12. SIOM documented a whole new form of laser crystal Yb∶GdScO3, of which the achieve bandwidth is about 85 nm. The typically employed activation ions for two μm laser crystals are Tm3+ and Ho3+. Tm3+ could be instantly pumped by laser diode. Ho3+ has more substantial stimulated emission cross section, and its emission wavelength is longer than two μm. We studied the growth, spectroscopy, and laser overall performance of Tm∶LiYF4, Tm∶LiLuF4, Ho∶LiYF4, Tm,Ho∶LiYF4, and Tm,Ho∶LiLuF4 crystals.
激光晶体的极化性能可能会影响输出激光束的质量和特性。有些激光晶体产生线性偏振光，这对某些应用可能有益。
Laser crystals are optical crystals �?usually single crystals (monocrystalline optical supplies) �?that happen to be applied as achieve media for reliable-condition lasers. Normally, They may be doped with either trivalent scarce earth ions or changeover metal ions.
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The host medium influences strongly the wavelength, bandwidth and transition cross-sections of pump and laser transitions and also the higher-condition life time.
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。
探索激光晶体的领域，可以让我们看到科学和技术相结合的奇迹，为我们带来了令人难以置信的进步。这些激光晶体，每一种都在组成和特性上独具匠心，是推动现代世界众多应用的动力。
A couple of laser crystal products have been shown where by some saturable absorber materials is incorporated for passive Q switching of a laser.
热膨胀和收缩系数对确定激光晶体的热透镜特性至关重要。最小化热透镜效应对于在广泛的操作温度范围内保持光束质量至关重要。
For quasi-a few-stage laser attain media and even a few-degree obtain media, a single usually has to limit the length to more info a price which can be as well small for successful pump absorption, as reabsorption consequences would if not spoil the effectiveness. For facet pumping, supplemental issues occur into play; Moreover effective pump absorption, it is important to get an appropriate spatial condition from the achieve profile.
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With that concept, 1 does not require an additional saturable absorber crystal, so that a person may perhaps make additional compact Q-switched laser setups with decrease inner parasitic losses. Having said that, undesired Uncomfortable side effects may additionally arise, like getting undesirable valence states of your concerned ions or energy transfers.
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。