CR4

Crystal of Cr4 + : YAG has been widely used in LD end-pumped solid-state laser .

Cr4+：YAG晶体作被动调Q晶体的二极管泵浦固体激光器得到了广泛应用。

Chapter 1 : Introducing the Cr4 + : YAG 's optical function , the general research situation and the main idea of this thesis .

第一章：介绍了Cr~（4+）∶YAG的光学性能、国内外研究概况和本论文研究的主要内容。

Using the physical address extension ( PAE ) flag , located in bit5 of control register CR4 .

使用物理地址扩展位（PAE），位于控制寄存器CR4的第五位。

The fundamental properties of Cr4 + : YAG is researched , and rate equation is given when the Gauss 's distribution is considered .

研究Cr~（4+）：YAG晶体作为被动调Q元件时的一些基本特性；并给出当考虑腔内光强的高斯分布时连续波被动调Q的速率方程；

A passively Q-switched laser was reported by using Cr4 + : YAG as saturable absorber and KTP as nonlinear crystal .

报道了一种LD泵浦的被动调QNd：LuVO4激光器，其中，Cr4+：YAG作为可饱和吸收体，KTP作为倍频晶体。

The non-volatile fields are cr2 , cr3 , and cr4 .

非易失性域有cr2、cr3和cr4。

Presented recent development of Cr4 + : YAG passively Q-switched laser . The review and prospect of passively Q-switching technology was also presented . 2 .

详细论述了近年来Cr4+：YAG被动调Q激光器的发展状况，对被动调Q技术的发展进行了回顾和展望。

This thesis implements the theoretical analysis of optimization of the Cr4 + : forsterite laser in room - temperature , it is summarized as follows : 1 .

本论文对室温掺铬镁橄榄石激光器参数优化进行理论分析。

According to the criterion of curative effect of solid tumor follow-up CR4 patients , PR17 patients , NC2 patients and PD4 patients .

随访患者按实体瘤疗效标准：完全缓解（CR）4例，部分缓解（PR）17例，无变化（NC）2例，进展（PD）4例。

Simulation and analysis thermal effect of Cr4 + : forsterite laser , derivation and calculation figure of merit ( FOM ) formula of thermal loading lifetime .

对掺铬镁橄榄石激光器的热效应进行模拟分析及晶体热负荷寿命优质系数（figureofmerit）公式的推导和计算。

This paper reported a continuous-wave Cr4 + : YAG laser pumped by a Nd : YVO4 laser with a tuning range over 160 nm .

介绍了一种在1500um附近连续可调谐的Cr~（4+）：YAG激光器，最大可调谐范围达160um。

Passively Q-switched operation of a laser diode end-pumped Nd ∶ YVO4 laser was realized by using Cr4 + ∶ YAG as saturable absorber .

采用Cr4+∶YAG晶体作为可饱和吸收体，实现激光二极管（LD）端面抽运的Nd∶YVO4激光器的被动调Q运转。

Tunable solid state lasers are widely used in recent years . Particularly , Tunable output of Cr4 + : forsterite is applied to biomedical imaging and other medical fields .

其中可调谐固体激光器在近年来得到广泛应用，尤其是掺铬镁橄榄石激光器，它的可调谐输出适用于生物医学成像等医疗领域。

The adjust-free passively Q-switched Nd : YAG laser is realized by use of the Cr4 + : YAG crystal as passive Q-switch .

采用Cr4+：YAG晶体作为被动调Q开关，实现了免调试Nd：YAG固体激光器的被动调Q。

By using the pertinent parameters of Cr4 + : YAG crystal , the pulse width of 1.44 um are analyzed theoretically and the results are consistent with the experimental data .

理论上根据Cr~（4+）：YAG激光器的相关参数，计算了1.44μm激光的脉宽，理论结果和实验结果基本一致。

Among these , some Cr4 + - doped crystals have the character of polarized absorb , and can obtain the linear polarized output pulse laser without any polarizer .

其中有的含Cr离子晶体还具有偏振方向选择的吸收特性，不加任何偏振元件即可输出线偏振的脉冲激光，这对于腔内倍频是一个非常好的特性。

Using pre-pumping mechanism to improve the stability of passively Q-switched lasers , it has been verified with Nd3 + , Cr4 + : YAG .

采用增益预抽运技术改善被动调Q固体激光器输出的不稳定性，并在Cr~（4+），Nd~（3+）：YAG双掺自调Q晶体上得到实验验证。

High-quality Cr4 + , Nd3 + ∶ YAG transparent ceramics , which combine the gain media and the saturable absorber together , may be a potential self-Q-switched laser material .

Cr，Nd∶YAG透明陶瓷很可能是一种具有潜力的自调Q激光材料。

The calculated indexes of CR4 and IHH show that Guangdong 's newspaper market dominated by four newspaper groups , including issuing market and advertisement market , belongs to the style of oligopoly .

通过计算CR4和IHH两个指数，得到的结果都表明广东报业市场结构，无论是发行市场，还是广告市场都属于高度寡占型，基本由四大报业集团垄断。

As a new solid laser material in recent years , Cr4 + : YAG crystal has super advantages , such as big absorption cross section , stable saturable absorption , good heat-conducting and mechanical performance .

Cr~（4+）∶YAG晶体作为近年来人们发现的新型固体激光材料，具有吸收截面大、可饱和吸收稳定性好、热传导性和机械性能良好等优点。

The pump slope efficiency was about 17.4 % . Passively Q-switched single-longitudinal-mode laser was also achieved by using a piece of Cr4 + : YAG as an intracavity saturable absorber .

通过在激光腔内插入Cr~（4+）：YAG饱和吸收体，在扭转模腔激光器中实现了被动调Q，获得了脉冲宽度为100ns的单纵模调Q激光脉冲。

Done some experimental research on QCW diode-pumped intracavity frequency doubling passively Q-switched Nd : YAG / KTP green laser , using Cr4 + : YAG as a saturable absorber .

采用内腔倍频方案，以Cr4+：YAG为可饱和吸收体，进行了准连续LD泵浦被动调QNd：YAG/KTP绿光激光器的实验研究。

In low laser intensity , Cr4 + : YAG can be used as slow saturable absorber . The nearer is the initial transparence to the max initial transparence , the bigger is the loss modulation .

在光强不太大的情况下，Cr~（4+）∶YAG可作为慢饱和吸收体，其初始透过率越靠近最大初始透过率，损耗调制越大。

We report on the experimental studies of diode-pumped a new mixed vanadate crystal Nd ∶ Y_xGd_1-xVO_4 lasers passively Q-switched by Cr4 + ∶ YAG crystal , formed with a simple plane-concave re-sonator .

报道了采用简单的平凹腔设计、二极管抽运一种新型混合晶体Nd∶YxGd1-xVO4、用Cr4+∶YAG晶体作饱和吸收体被动调Q激光器。

Quasi-cw ( QCW ) diode-pumped passively Q-switched Nd : YAG laser with the Cr4 + : YAG as a saturable absorber , can obtain pulses with high peak power and narrow pulse width .

准连续LD泵浦、以Cr4+：YAG为可饱和吸收体的Nd：YAG被动调Q激光器，能输出高峰值功率、窄脉宽的激光脉冲。

These two crystals such as Cr4 + : Mg2SiO4 and Cr4 + : YAG will hopefully become the ideal gain medium of tunable lasers in the near infrared wavelengths , and the study of them will be the most important .

尤其是Cr~（4+）：YAG和Cr~（4+）：Mg2SiO4这两种晶体有望成为近红外可调谐固体激光器的理想增益介质，所以对它们的研究尤为重要。

Based on the units design of the laser , the physical and chemical characteristics and laser characteristic of the laser crystal Nd : YLF were discussed , at the same time , the saturable absorption properties of the Q-switched crystal Cr4 + : YAG were discussed .

本文从构成Nd：YLF固体激光器的单元器件着手，分析了激光工作物质Nd：YLF晶体的物理化学特性和激光特性以及调Q晶体Cr~（4+）：YAG的可饱和吸收特性。

Chapter 1 : The paper appraises the laser characteristics of Cr4 + ions in several garnet host crystals , especially the important characteristics and the application in laser devices of Cr4 + : YAG and Cr4 + : Mg2SiO4 and the general research situation .

第一章：综述了掺Cr~（4+）离子的激光材料特性，特别是Cr~（4+）：YAG和Cr~（4+）：Mg2SiO4晶体的重要特性以及在激光器件中的应用和国内外研究概况。

The dynamic equations have been derived to describe the characteristics of Cr4 + : YAG laser and intracavity singly resonant optical parametric oscillator pumped intracavity by a passively Q-switched Nd : YAG laser . The Cr4 + : YAG is used as the saturable absorber and laser gain medium .

推导了描述以Cr~（4+）：YAG作为饱和吸收体和激光增益介质、被动Q开关运行的Nd：YAG激光器谐振腔内泵浦的Cr~（4+）：YAG激光器和单共振光学参量振荡器的动力学特性的速率方程。