本文研究了Tb3+激活YAG 主晶格外延层中Ga3+掺杂的荧光敏化效应，可以看到在Tb3+荧光得到显著增强的同时，外延荧光层发光的饱和特性也有所改善。文中试图用基质与Tb3+之间的声子耦合来解释上述Tb3+：YAGG外延层中所存在的能量传递、荧光敏化现象。

This paper gives a report on the growth of saturable-absorber Cr, Ca: YAG by LPE. The analysis of the transmission spectra of epitaxially grown Cr, Ca: YAG shows that Cr4+ concentration ratio to total Cr concentration increase inversely as the concentration ratio of Ca and Cr decrease to Ca/Cr≈1. The transmission variation DT at 1.06 mm was measured to range between 5% and 30% according to the Cr concentration and the thickness of the epilayers. A discussion on the origin of a new absorption band at 760nm is also presented, which suggests that Cr5+ ion could exist in the Cr, Ca: YAG in addition to Cr3+ and Cr4+. ©2002 Elsevier Science B.V. All rights reserved.

报道了可饱和吸收体Cr，Ca：YAG 的液相外延生长。对双掺杂Cr，Ca：YAG 外延层的吸收特性进行了分析与讨论，发现外延层中Cr4+离子的掺杂浓度是随着Ca/Cr 比例的减少反而有所增加（直到Ca/Cr≈1）。由于Cr 离子掺杂浓度以及外延层厚度的不同，外延片在λ=1.06μm 处的饱和与非饱和光透过率之差ΔT 在5%~30%的范围内变化，完全满足单片式被动调Q微晶片激光器对饱和吸收体的设计要求。对位于760nm 附近的新吸收峰的起源进行了讨论，并将其归属为四面体格位上Cr5+离子2B1(2E)⇒2E(2T2)的电偶极允许跃迁。

基于液相外延工艺，实现了一种结构新颖的单片式被动调Q微片激光器。采用了在激光介质Nd3+：YAG 表面直接液相外延生长一层具有饱和吸收特性的Cr4+：YAG 膜的微谐振腔的结构，由于是同质外延生长过程，能够确保饱和吸收体与增益介质间（Nd3+：YAG/Cr4+：YAG）良好的界面特性，从而为器件高性能的激光输出打下基础。目前，采用光纤藕合激光二极管，在LD 输出为1W 的抽运条件下，实现了峰值功率近kW、稳定重复频率在4kHz 以上、脉宽1.8ns、TEM00 单横模式、波长1.064μm 的调Q脉冲序列输出。文中在对新型单片式微激光器的性能报道的基础上，阐述了外延单片式结构及其相应工艺的潜在优势。

a2-inch cathode-ray projection tube which consist of newly developed monocrystalline luminescent sceen < Ce:Tb:(Lu,Y)3(Ga,Al)5O12 >with emission in blue band has reached the maximum luminance of 2,300 cd/m2 with luminescence efficiency of 0.5 lm/w in a raster of 10 cm2 at excitation of a 25 kv,1mA electron beam, while the tube has a half-intensity linewidth of 34 μm that is equivalent to 2,000 clearly resolved lines, which means it a ideal device developed for high luminance, high resolution displays . In this paper, the preparation process of this novel single-cystal screen has been described in detail, some factors that influence energy conversion efficiency and colour of luminescence have been discussed, interesting conclusions are presented.