钛宝石泵浦Nd：NaY（WOR）2晶体激光性能研究

介绍了新型激光晶体Nd:NaY(WO4)2(Nd:NYW)的生长,测量了Nd:NYW晶体的透过和发射光谱。以Ti宝石激光器作为泵浦源,对晶体的激光特性进行了研究。当耦合输出镜的透过率为3％时,548nW的泵浦功率下获得192mW的1060nm激光输出,斜功率达到37％,阈值为25mW.     

激光二极管抽运的Nd:NYW/LBO绿光激光器

报道了用激光二极管(LD)抽运的掺钕钨酸钇钠[Nd3 :NaY(WO4)2](简称Nd:NYW)绿光激光器。腔内采用Ⅰ类临界相位匹配LBO(LiB3O5)作为倍频晶体,阈值抽运功率为410mW,在抽运功率为1.5W时获得了87mW的530nm连续激光输出,基频光-光转换效率大于25%,斜率效率为7.98%。     

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%。     

Low-threshold dye laser pumped by visible laser diodes

The author describes a continuous-wave (CW) dye laser has been pumped by laser diodes for the first time. Two 10-mW visible laser diodes were polarization-combined to pump a rhodamine 700 dye jet laser. The absorbed pump threshold power was 5.6 mW, and 0.28 mW of output power was produced at 758 nm. The resonator was scalable and generated over 360 mW with a slope efficiency of 57% when pumped with a DCM dye laser at 660 nm     

基于角度调谐F-P干涉仪的C波段可调谐激光器的研究

研究了基于法布里一珀罗(F-P)干涉原理的角度调谐的滤波器特性,使用自制的滤波器进行可调谐掺Er^3 光纤激光器实验。当980nm泵浦功率为30mW时获得了稳定的单纵模激光输出,输出功率约。0.65mW,线宽低于0.1m,在35．76nm波长调谐范围内功率变化不超过1dB,边模抑制比(SMSR)大于35dB;泵浦功率为46mW时获得了最大的输出功率,约为1mW。     

单频分布布拉格反射光纤激光器及温度传感实验研究

报道利用Er∶Yb双掺杂光纤制作的单频窄线宽分布布拉格反射 (DBR)光纤激光器。在 980nm半导体激光器抽运下 ,当抽运功率为 75mW时 ,获得了输出功率为 2 3mW的单频激光 ,其中心波长为 1 5 5 7 5 2 4nm ,线宽小于 5MHz。利用制作的单频DBR光纤激光器构成光纤有源传感系统 ,进行温度传感实验研究 ,实验结果线性度很好 ,高信噪比和高输出功率使得该系统具有波长易于检测的优点     

Laser-diode-pumped Cr:LiSrGaF6 laser

Diode-pumped operation of a Cr:LiSrGaF₆ laser is described. Efficient performance was obtained between 810 and 855 nm. The maximum output power was 130 mW at 810 nm, and the slope efficiency was 26%. The sample was pumped with a total incident power of 560 mW using two polarization-combined high-power visible laser diodes. These results represent the CW power reported for a diode-pumped Cr-doped laser     

全固态Cr:LiSAF/LBO腔内倍频蓝光激光器

本文报道了利用最大输出功率为650mW的全固态Nd:YVO4/LB0671nm红光激光器作为泵浦源,纵向泵浦Cr:LiSAF,利用LBO腔内倍频,获得430nm的连续蓝光输出的实验研究,并解释了当泵浦功率继续增大时,输出功率下降的原因。在泵浦功率为560mW时,获得了最大输出功率为9mW的430nm蓝光输出,激光的阈值为230mW。     

钛宝石激光泵浦Yb:YAG微片激光器获得1.053μm高效激光输出

实现了钛宝石泵浦Yb：YAG微片激光器的室温运转,Yb：YAG晶体中Yb3 的掺杂浓度分别为10at－％和20at－％,当20at％Yb：YAG晶体微片（6min×6mm×0．5mm）吸收的泵浦功率为784mW时,获得356mW1．053μm的CW激光输出,斜率效率高达69％,总的光-光效率为45％。     

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。     

半导体激光照射对红细胞流变学性质的影响

目的:研究低强度激光对红细胞流变学特性的影响。方法:分别用3mW、4mW、5mW、6mW、10mW的半导体激光照射患者离体血液,直接测量切变率为100 S-1、300 S-1、600 S-1、1000 S-1时红细胞的变形指数Dii、最大变形指数MAXDI和变形指数曲线面积SSS。结果:用650nm激光照射20min后,红细胞变形能力有明显改善,此变形能力的改善随照射功率增大而增强,至4mW后趋于饱和。结论:低强度激光照射能显著提高红细胞的变形能力,功率为4mW效果最佳。     

窄线宽LD泵浦双包层光纤激光器

报道了LD泵浦的窄线宽双包层光纤（DCF）激光器，从理论和实验数值模拟了激光输出功率对输出镜反射率，光纤长度和吸收泵浦功率的依赖关系，进而进行了实验，实验中选用光纤布拉格光栅（FBG）作为输入腔镜，利用光纤端面菲涅耳反射作为输出腔镜，得到了窄线宽的单模激光输出。最大输出功率421mW，斜率效率78.2%，激光中心波长1086.92nm，谱线宽度0.16nm。     

NdLMA激光器的附加脉冲锁模

用半导体激光泵浦ＮｄＬＭＡ激光器在１．０５４μｍ波长处获得连续６５０ｍＷ的激光输出，斜效率达３３％。利用一个包含光纤的非线性外腔，实现了自启动的ＮｄＬＭＡ附加脉冲锁模，输出平均功率为５８ｍＷ的接近带宽转移极限的１．８ｐｓ超短脉冲激光     

Gain switching of waveguide laser based on Nd-doped silica planarlightwave circuit pumped by laser diodes

A gain-switched Nd-doped silica waveguide laser pumped by laser diodes (LDs) was successfully realized. The light from two CW operated and modulated LDs was synthesized and used to investigate gain switching characteristics under various pump conditions. Pulses with a peak power of 1.0 mW and a full width at half maximum of 480 ns were obtained at a repetition rate of 150 kHz. The average modulated pump power was 17 mW and the bias pump power was 35 mW. A gain-switched pulse repetition rate of 25 to 150 kHz was achieved by controlling the pump power of a CW operated and a modulated LD     

High-temperature(T = 80℃) operation of a 2μm InGaSb-AlGaAsSb quantum well laser

正An InGaSb/AIGaAsSb compressively strained quantum well laser emitting at 2μm has been fabricated. An output power of 82.2 mW was obtained in continuous wave(CW) mode at room temperature.The laser can operate at high temperature(T = 80℃),with a maximum output power of 63.7 mW in CW mode.     

钛宝石激光泵浦的1.06μm和1.34μm高效连续掺钕氟钒酸锶激光器

利用钛宝石激光作为泵浦源,实现了掺钕氟钡酸锶（ＮｄＳＶＡＰ）晶体在１．０６μｍ和１．３４μｍ的高效连续激光运转。在１．０６μｍ和１．３４μｍ处得到的最低泵浦阈值分别为２ｍＷ和２．４ｍＷ,最高斜效率分别为４９．４％和３７．４％,最大输出功率分别为３３６ｍＷ和１６５ｍＷ。     

A 780 nm high-power and highly reliable laser diode with a longcavity and a thin tapered-thickness active layer

Conventional AlGaAs laser diodes with uniform thickness active layers of various cavity lengths are investigated. It is recognized that the extension of the cavity length is effective in the improvement of the maximum output power, the temperature characteristics, and the operating life in high-temperature conditions. A 780-nm, high-power laser diode having a 350-μm-long cavity with a thin tapered-thickness active layer was fabricated. The optical power density near the mirror facets, the thermal resistance, the current density, and the carrier density were reduced by this structure. The laser emitted over 100 mW of CW (continuous-wave) output power at temperatures up to 80°C. A maximum output power level of 160 mW was achieved at room temperature. The fundamental transverse mode was confirmed at least up to 120 mW     

Single-frequency Ti:Al2O3 ring laser

Over 500 mW of single-frequency power has been obtained from a Ti:Al₂O₃ ring laser pumped by 10 W (all lines) from an argon ion laser. The ring laser can be tuned from 750 to 850 nm while maintaining more than 100 mW in single-frequency operation without realignment or a change of optics. The free-running frequency stability of the laser is 3 MHz. Thermal effects cause changes in the ring cavity parameters, limiting the output power. This ring laser has also been operated with an acoustooptic mode locker to obtain 200-ps mode-locked pulses at 250 MHz with nearly the same average power as in single-mode operation     

1550-nm Driven ErAs:In(Al)GaAs Photoconductor-Based Terahertz Time Domain System with 6.5 THz Bandwidth

ErAs:In(Al)GaAs superlattice photoconductors are grown using molecular beam epitaxy (MBE) with excellent material characteristics for terahertz time-domain spectroscopy (TDS) systems operating at 1550 nm. The transmitter material (Tx) features a record resistivity of 3.85 kΩcm and record breakdown field strength of 170 ± 40 kV/cm (dark) and 130 ± 20 kV/cm (illuminated with 45 mW laser power). Receivers (Rx) with different superlattice structures were fabricated showing very high mobility (775 cm²/Vs). The TDS system using these photoconductors features a bandwidth larger than 6.5 THz with a laser power of 45 mW at Tx and 16 mW at Rx.