激光二极管泵浦Nd：Sr5（PO4）3F小型绿色激光器

以激光二极管作为泵浦源，ＫＴＰ用作内腔倍频晶体，我们已从一种新型的Ｎｄ：Ｓｒ５（ＰＯ４）３Ｆ晶体中得到了０．５２９５μｍ的绿色激光输出，阈值功率为１０ｍＷ，当光学效率为１０．１％二极管激光输入射泵浦功率为４００ｍＷ，ＴＥＭ００模绿色激光输入功率为４０．４ｍＷ，给出了ＣＷ内腔倍频激光器的理论公式，并与试验结果一致。     

激光二极管泵浦高效Nd：YVO_4激光器特性研究

报道了激光二极管泵浦高效Ｎｄ：ＹＶＯ４激光器输出功率及波长特性的研究。基频光输出２３０ｍＷ，光－光转换效率为４５％。对激光输出波长和泵浦功率的关系进行了研究，发现激光器的输出波长随泵浦功率的平均变化率约为１．０５×１０－３ｎｍ／ｍＷ。利用ＫＴＰ腔内倍频获得２９．８ｍＷ的绿光输出，光－光转换效率为１２．４％。     

LD泵浦的Nd∶YAG腔内倍频激光器及其模式

用KTP晶体研制成LD泵浦的YAG腔内倍频激光器,得到0.532μm连续绿色线偏振激光输出,阈值泵浦功率为41mW,输出功率为1.4mW,斜效率为1.7％。研究了泵浦光对倍频激光横模的影响。     

LD泵浦的声光调Q腔内倍频激光器

研制成用ＬＤ泵浦的声光调Ｑ的Ｎｄ：ＹＶＯ４－ＫＴＰ腔内倍频激光器，得到了ＴＥＭ００模、频率高达１００ｋＨｚ的稳定的５３２ｕｍ绿激光脉冲系列输出，阈值泵浦功率为２７ｍＷ；在连续５７０ｍＷ的泵浦功率下，绿激光脉冲的峰值功率达１１００Ｗ，脉宽为４．６ｕｓ；输出功率稳定，在±５℃的工作温度变化下，输出功率变化小于±２％。此种器件可望得到广泛的应用。     

激光二极管泵浦Nd：YVO4折叠腔倍频激光器

报道用激光二极管泵浦的Ｎｄ：ＹＶＯ４－ＫＴＰ折叠腔内倍频激光器，实现了５３２ｎｍ的激光输出，功率１３０ｍＷ，光－光转换效率１１％，激光阈值〈９０ｍＷ。研究了倍频光的输出特性讨论了腔内基波光对倍频光的影响因素。     

二极管端泵浦Nd：YAG连续激光器

我们研制了一台二极管连续端泵浦的Ｎｄ：ＹＡＧ激光器，用国产激光二极管作泵浦源，泵浦激光波长为０．８０８μｍ。激光介质为φ５×５ｍｍ的Ｎｄ：ＹＡＧ棒，输出激光波长为１．０６μｍ，用ＣＣＤ相机和图象处理系统记录和分析激光光斑，得到激光横模为ＴＥＭ００模，当输入谐振腔的泵浦功率为２２５ｍＷ时，输出连续激光功率最高达７６．４ｍＷ，光－光转移效率为３３．９％，电光斜效率达到９．１％，并做了腔外倍频实验。     

全固化Nd：YVO4绿光激光器

本文介绍了一种新型微型全固化绿光激光器。采用激光二极管端面泵浦Ｎｄ：ＹＶＯ４激光晶体，用ＫＴＰ作为非线性倍频晶体，当泵浦光功率为３６０ｍＷ时，获得５３０ｎｍ波长、９．３ｍＷ的基横模绿光输出，总的光－光转换效率为２．４％。     

Nd∶GdVO_4晶体的生长与性能

报道了在Ｎ２＋Ｈｅ（３０％～５０％Ｖｏｌ）气氛中用提拉法成功地生长了Ｎｄ∶ＧｄＶＯ４晶体。激光实验中，ＬＤ泵浦功率为３５０ｍＷ，采用端泵方式获得波长为１０６０ｎｍ的激光输出，ＴＥＭ００基模方式运行，阈值泵浦功率为９５ｍＷ，输出功率为１３ｍＷ，斜效率为５％。     

晶体温度对L泵浦Nd：YVO_4／KTP腔内倍频激光器输出的影响

研究了ＬＤ泵浦Ｎｄ：ＹＶＯ４／ＫＴＰ腔内倍频激光器中激光晶体与倍频晶体的温度对器件基频与倍频输出的影响。用国产１Ｗ激光二极管作泵浦源,通过选择合适的Ｗｄ：ＹＶＯ４和ＫＴＰ的工作温度,在泵浦功率为６０４．２ｍＷ时获Ｔ得１３３．６ｍＷ的绿光输出,光－光转换效率为２２．１％。     

1.535μmEr：Yb磷酸盐玻璃薄片连续激光器

报道了以９８０ｎｍ钛宝石激光端面泵浦室温连续１．５３５μｍＥｒ：Ｙｂ磷酸盐玻璃薄片激光器。实验上研究了９５０－９８８ｎｍ泵浦波长范围内激光输出特性，结果表明，９７５ｎｍ为最佳泵浦波长。在９７５ｎｍ泵浦下，实现了５ｍＷ低阈值起振和２１％的光－光转换效率；最大单频线偏振输出功率达２２ｍＷ。同时，观察并分析了高泵浦条件下输出激光的偏振与纵横性质，以及由泵浦吸收饱和而引起的输出功率饱和效应。     

蓝光二极管双端抽运Pr:YLF晶体320 nm紫外激光器（特邀）

设计了一种采用不同波长的蓝光二极管合光作为抽运源并采用双端抽运的方式抽运Pr:YLF晶体320 nm紫外激光器。该激光器结构采用V型折叠腔结构,使用波长分别为444 nm和469 nm、抽运功率分别为3 W和1.4 W的蓝光激光二极管作为抽运源,对12 mm长、0.3%掺杂浓度的Pr:YLF晶体进行抽运,并且使用三硼酸锂晶体作为倍频晶体来实现倍频,匹配方式为I类相位匹配。通过对谐振腔参数进行优化,当5700 mW的抽运功率注入晶体时,输出了1005 mW最大输出功率的320 nm紫外连续激光,光光转换效率约为17.6%。     

准连续Ti~(3+):Al_2O_3可调谐激光的研究

本文给出了Ti~(3+):Al_2O_3的准连续可调谐激光的实验结果。采用Nd:YAG内腔倍频532nm的准连续输出作为泵浦源,得到Ti~(3+):Al_2O_3的连续可调谐输出。波长覆盖范围为685nm到821nm。最大输出功率为293mW,斜率效率为20％,在805nm处的窄谱输出功率达240mW,总体转换效举为26％。     

High-power 980-nm AlGaAs/InGaAs strained quantum-well laser grown by OMVPE

High-power lattice-strained AlGaAs/InGaAs graded index separate-confinement heterostructure (GRINSCH) quantum-well lasers emitting at a 980-nm wavelength have been grown by organometallic vapor phase epitaxy (OMVPE) and fabricated with a self-aligned ridge-waveguide structure. Using a 3- mu m-wide and 750- mu m-long AR-HR coated laser, 30 mV of optical power was coupled into optical fibers with 28.6% efficiency. A dominating single-lobe far-field radiation pattern was obtained from a wedge-shaped ridge-waveguide laser for output power as high as 240 mW with a maximum output power of 310 mW.<>     

Diode pumped caesium laser

A continuous-wave caesium vapour laser with diode laser pumping is demonstrated. An output power of more than 130 mW was achieved using a 400 mW pump giving an overall optical efficiency better than 32%. It is expected to increase the laser efficiency with improvement to the experimental setup.     

LD泵浦OF耦合NYAB自倍频激光器的初步研究

研制出国内第一台LD泵浦OF耦合NYAB自倍频激光器,产生0.531μm的线偏振绿色激光。基横模运转,阈值泵浦功率为14mW,输出功率达3.6mW,斜效率达3％,偏振度大于99.8％。     

Er3+:YAlO3 upconversion laser

Upconversion lasing in Er:YAlO₃ is reported. Laser emission was produced using both sequential two-step pumping and cross-relaxation energy transfer. In addition, photon avalanche upconversion pumping was demonstrated. Selection among these pumping mechanisms is determined by the pump wavelength, and laser operation was obtained with excitation between 785 nm and 840 nm. The highest laser output power was achieved at 34°K, where 918 mW of pump power at 807 nm produced 121 mW of TEM₀₀ emission. The optical conversion efficiency was 13%. Repetitively Q-switched operation is reported, and the temporal- and temperature-dependence of the laser output is discussed     

Cladding-pumped fiber laser

Laser emission at 1.06 μm, pump light absorption, laser threshold, slope efficiency, and alignment tolerance as a function of the fiber length have been measured for a cladding-pumped double-clad Nd:glass fiber laser. The fiber laser was pumped with a laser diode emitting at 810 nm. It produced an output power of 15.9 mW at an absorbed pump power of 55.1 mW. This corresponds to an optical-optical conversion efficiency of 38.8%     

激光二极管泵浦高效Nd:YVO4激光器特性研究脉冲倍频稳频Nd:YAG环形激光器

报道了激光二极管泵浦高效Nd:YVO4激光器输出功率及波长特性的研究。基频光输出230 mW, 光-光转换效率为45%。对激光输出波长和泵浦功率的关系进行了研究, 发现激光器的输出波长随泵浦功率的平均变化率约为1.05×10 -3 nm/mW。利用KTP腔内倍频获得29.8 mW的绿光输出, 光-光转换效率为12.4%。在脉冲稳频Nd:YAG激光器的基础上, 采用辅助的长脉冲网络泵浦和短而强的主脉冲泵浦相结合, 以F-P共焦腔为参考频标, 通过同步搜索补偿稳频技术和截波技术.获得中心频率稳定、频漂小于10 MHz、脉宽100 μs、峰值功率>100 W的无尖峰结构的0.53 μm稳频绿光输出。     

LD泵浦的Nd:YAG陶瓷激光器

介绍了一种新型的固体激光材料——Nd：Y3Al5O12(Nd：YAG)陶瓷的光学特性,设计并研制成LD泵浦的Nd：YAG陶瓷微型激光器件。阈值泵浦功率为48mW,在泵浦功率为1．5W时获得了516mW的1064nm连续激光输出,光-光转换效率为34．41%。     

Widely tunable high-power external cavity quantum cascade laser operating in continuous-wave at room temperature

A grating-coupled external cavity quantum cascade laser operating in continuous-wave at room temperature is reported. Single-frequency operation tunable over more than 160 cm^-1 around the centre wavelength of 4.6 mum has been observed at a chip temperature of 300 K. The maximum optical power at the gain peak was 300 mW, corresponding to a wall-plug efficiency of 6 %. Observed power output at the gain bandwidth edges was in excess of 125 mW.