Crystal Growth of ScBO3:Cr 3+ — A New Near-IR Tunable Laser Crystal
Crystal Growth of ScBO3:Cr 3+ — A New Near-IR Tunable Laser Crystal
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DOI：
10.1007/978-3-540-47433-3_9
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发表时间：
1986-06
期刊：
影响因子：
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通讯作者：
B. Chai;M. Long;R. Morris;S. Lai
中科院分区：
文献类型：
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作者：
B. Chai;M. Long;R. Morris;S. Lai
自紫翠宝石室温可调谐激光器发现以来，人们在探索新的激光材料方面做了大量的工作，并发现了几种新的室温可调谐激光基质[2]。在几乎所有情况下，Cr 3+都被用作活性离子。最近，人们对Al 2 O3：Ti 3+激光器的发现感到兴奋，因为它具有更宽的调谐范围，简单的能级结构和相对较大的增益截面。但是短寿命和差的吸收使得Ti 3+难以泵送。掺Cr ~（3+）的可调谐激光器通常具有有效的吸收和足够的寿命，但光学增益相对较低。幸运的是，通过对掺铬可调谐激光器的物理学的理解，可以通过改变基质晶体的晶体场强度来操纵可调谐范围。还可以选择具有低折射率以及适当的位置畸变的晶体主体，使得发射截面可以增加到一定程度而不会显著降低荧光寿命。
Since the discovery of the alexandrite room-temperature tunable laser [1], much effort has been expended in exploring new laser materials and several new room-temperature tunable laser hosts [2] have been discovered. In almost every case Cr3+has been used as the active ion. More recently, there is excitement over the discovery of the Al203:Ti3+laser [3] because of its broader tuning range, simple energy-level structure and relatively large gain cross-section. But the short lifetime and poor absorption has made Ti3+ difficult to pump. Cr3+doped tunable lasers generally have efficient absorption and adequate lifetime but the optical gain is proportionately lower. Fortunately, through understanding of the physics of Cr-doped tunable lasers, it is possible to manipulate the tunability range by varying the crystal field strength of the host crystal. It is also possible to select crystal hosts with low refractive indices as well as proper site distortions,so that the emission cross-section can be increased to a certain extent without significantly degrading the fluorescence lifetime.