激光二极管侧面泵浦的高效率Nd：YAG激光器

用准连续激光二极管列阵侧面泵浦Ｎｄ：ＹＡＧ固体激光器，获得３９．５ｍＪ的静态输出，器件重复频率为５０Ｈｚ，效率最高达３９．５％，对该器件进行了细致的实验研究，验证了理论计算的正确性，并对实验结果进行了分析。     

基于体布拉格光栅的Nd:YAG/Cr4+:YAG激光器波长调谐特性

通过建立包含体布拉格光栅波长特性的速率方程模型,模拟了不同泵浦功率、体布拉格光栅中心衍射效率和带宽情况下,激光器的波长调谐特性,包括波长调谐范围、激光光谱、能量和脉冲宽度.实验搭建了以体布拉格光栅作为输出镜的激光二极管泵浦Nd:YAG/Cr4+:YAG激光器,测试了不同体布拉格光栅温度和泵浦功率时的激光波长、线宽、能量...     

高温LDAs泵浦紧凑型Nd:YAG激光器

设计了一套紧凑型高温激光二极管阵列端面泵浦电光调QNd∶YAG激光器.为使激光器整体结构紧凑,以高温激光二极管阵列作为泵源以有效地降低Nd∶YAG激光器散热压力.利用Ansys软件对高温激光二极管阵列工作时的温度场进行模拟.使用基于K9玻璃材质的导光锥将泵浦光耦合进Nd∶YAG晶体内.利用Traceproc软件模拟了导光锥前后端面的光场分布.采用5mm×5mm×40mm、掺杂浓度为1.0at.%的Nd∶YAG晶体作为增益介质,利用Ansys软件对200     

LD泵浦Nd:YAG/LBO结构660 nm红光激光器

采用国产LD泵浦Nd:YAG晶体,通过谐振腔镜的膜系选择获得了Nd³⁺离子中波长为1319 nm的受激辐射振荡,首次用I类临界位相匹配LBO进行腔内倍频,实现了660 nm红色激光的高效倍频输出.当泵浦注入功率为800 mW时,660 nm激光基横模(TEM₀₀)输出功率为46 mW,光光转换效率高达5.75%.     

高平均功率调Q准连续Nd:YAG激光器

通过选用低掺杂浓度的Nd:YAG晶体棒、热近非稳腔优化设计、双棒串接热致双折射补偿技术以及双Q开关正交放置结构,在LD抽运功率1116W时,实现调Q准连续全固态Nd:YAG激光器1064nm输出,平均功率达258W,光束质量M²～15.5,重复频率为10kHz,脉冲宽度为64ns,峰值功率达0.4GW,光光转换效率达23.1%.关键词：Nd:YAG激光器准连续波激光二极管抽运固体激光器     

450W二极管泵浦Nd：YAG薄片激光器

二极管泵浦高平均功率固体激光器在工业、科研和军事等领域具有非常广泛的应用。光学泵浦将在固体激光介质里产生废热并引起介质温度升高。激光器的连续运转要求实时冷却以消除废热。由于固体激光介质的热导率通常较低，因此在激光介质内部和冷却表面之间将产生显著的温度梯度，这就导致了折射率梯度、机械应力和退偏等效应，进而降低光束质量，减小输出功率，甚至造成介质的断裂。这些效应是固体激光器向高平均功率定标的最大挑战。采用薄片激光介质是解决这一问题的有效手段之一。     

钛宝石激光器端面抽运Nd:YAG陶瓷激光器热沉积理论和实验研究

通过热沉积系数研究在激光提取条件下掺杂原子分数为1.0%的Nd:YAG陶瓷激光器中热沉积问题.热沉积系数定义为热沉积功率与激光器输出功率之比.在理论分析基础上,通过测量激光器斜率效率来间接测定热沉积系数,实验测定的热沉积系数值为0.63.建立激光提取条件下Nd:YAG陶瓷发热模型,讨论了影响热沉积系数的主要因素.结果表明：热沉积系数对Nd:YAG陶瓷的辐射量子效率、交叠效率以及激光提取效率的变化非常敏感.为有效减少介质内热沉积,在激光器优化设计中交叠效率和激光提取效率是需要着重考虑的参数.所得结果可为进一步研究陶瓷激光器中热效应提供参考.关键词：热沉积Nd:YAG陶瓷固体激光器     

104 W内腔倍频全固态Nd:YAG绿光激光器

报道了一台高功率内腔倍频全固态Nd:YAG绿光激光器,针对KTP晶体热效应和激光热稳定腔,采取了对KTP晶体进行低温冷却的优化措施,以便减少KTP晶体的热效应导致的相位失配,同时兼顾了Nd:YAG棒的热致双折射效应和KTP晶体热透镜效应,设计了热稳定谐振腔;实验中采用80个20 W激光二极管阵列侧面抽运Nd:YAG棒和Ⅱ类相位匹配KTP晶体(在27℃时相位匹配角为φ=23.6°;θ=90°,尺寸为7 mm×7 mm×10 mm)内腔倍频技术,谐振腔腔长为530 mm,KTP晶体的冷却温度为4.3 ℃,抽运电流为18.3 A时,实现平均功率达104 W、脉冲宽度为130 ns的532 nm激光输出;其重复频率为20.7 kHz.光-光转换效率为10.2%.     

高功率高光束质量脉冲Nd: YAG激光器

以实现高功率、高光束质量的脉冲激光输出为目的,对非对称平-凹谐振腔的结构进行了理论分析。设计出了高功率、高光束质量非对称放置的平-凹谐振腔、双氙灯泵浦的脉冲Nd: YAG激光器。当占空比为9%时,实现输出激光平均功率近480 W,光束参数积优于12.7 mm·mrad,电光转化效率近4%,与理论分析吻合,可用芯径300 μm的光纤传输,不稳定性优于±1%。加工实验证明有较好的质量：切割材料为不锈钢,厚度为3 mm时、切割速度为0.6 m/min和厚度为1.5 mm、切割速度为1.2 m/min时,两种情况下所得切缝宽度均为250 μm,且切割上下沿光滑。     

高平均功率六棒串接脉冲Nd:YAG激光器

报道了一种腔内六棒串接的脉冲Nd:YAG激光器。采用44矩阵对晶体棒失调角度对谐振腔光轴的影响进行了理论分析,给出了六棒串接脉冲激光器中晶体棒失调角度的允许范围。在串接实验中,谐振腔采用对称平平腔结构,通过调整每根晶体棒的失调角度到允许范围内,实现了六棒串接脉冲Nd:YAG激光器。在输入电功率86 kW,占空比17%时,获得了平均功率3 018 W的脉冲激光输出,峰值功率17.75 kW,最高单脉冲能量为66 J,光束参数乘积为26.3 mmmrad,电光转换效率3.5%,长时间工作不稳定性小于2%。     

Oscillation conditions of cw simultaneous dual-wavelength Nd：YAG laser for transitions 4F3／2-4I9／2 and 4F3／2-4I11／2

The operating condition of a cw simultaneous dual-wavelength Nd:YAG laser for both {}^4F_{3/2}-{}^4I_{9/2} (quasi-three-level system) and {}^4F_{3/2}-{}^4I_{11/2}(four-level system) transitions is studied. According to this condition, the cw simultaneous dual-wavelength at 1.06μm and 946 nm in Nd:YAG crystal has been realized experimentally through an adaptive coating design of the cavity mirrors. A total power output of 2.5W of the dual-wavelength at 946nm and 1.06μm has been achieved with an optical conversion efficiency 14.3%. The experimental results are in good agreement with the theoretical analysis.     

Single Frequency Operation of Diode－pumped Intracavity Frequency Doubled Nd：YAG Laser With Tilted KTP Crystal： Theoretical Study

Ｓｉｎｇｌｅ　Ｆｒｅｑｕｅｎｃｙ　Ｏｐｅｒａｔｉｏｎ　ｏｆ　Ｄｉｏｄｅ－ｐｕｍｐｅｄ　Ｉｎｔｒａｃａｖｉｔｙ　Ｆｒｅｑｕｅｎｃｙ　Ｄｏｕｂｌｅｄ　Ｎｄ：ＹＡＧ　Ｌａｓｅｒ　Ｗｉｔｈ　Ｔｉｌｔｅｄ　ＫＴＰ　Ｃｒｙｓｔａｌ：　Ｔｈｅｏｒｅｔｉｃａｌ　Ｓｔ...     

Theoretical and Experimental Investigations of Diode-Pumped Tm:YAG Laser in Active Mirror Configuration

Based on the rate-equations of quasi-three-level lasers, we analyzed the threshold and the output power of longitudinally pumped Tm:YAG lasers in an active mirror configuration. In contrast to one-pass pumping, two-pass pumping in this configuration will result in a 24% decrease in threshold and 16% increase in slope efficiency. Using a 3-W diode-laser pumping in the active mirror configuration, we demonstrated a CW Tm:YAG laser and obtained 735 mW output power with a slope efficiency up to 49%. Using a Ti:sapphire laser to pump the same device, the threshold power was further reduced and the slope efficiency reached 59%.     

Diode-pumped Solid-state Cr4+:Nd:YAG/KTP Green Laser

A diode-pumped solid-state Cr4+:Nd:YAG/KTP green laser with intracavity second harmonic generation is reported. Stable quasi-cw output of 1.03 W in average power, 100 kHz of repetition rate and about 25 ns of pulse width were obtained. Repetition rate and pulse width were studied experimentally and analyzed under different conditions.     

108 W Nd: YAG ceramic laser with birefringence compensation resonator

The quartz rotator's effective birefringence compensation for ceramic Nd:YAG rods has been first demonstrated. Furthermore, a high output power continuous-wave laser is presented based on an optimized resonator made up of four Nd:YAG ceramic rods. By an appropriate design of the resonator, an output power of 108 W at 1064 nm is obtained. The corresponding optical-to-optical conversion efficiency is 16.8% and the slope efficiency is 28.1%. Meanwhile, the numerical analysis for output power is detailed.     

Single Longitudinal－mode with Pulsewidth Adjustable Ability Double Frequency Nd：YAG Laser System

ＳｉｎｇｌｅＬｏｎｇｉｔｕｄｉｎａｌ－ｍｏｄｅｗｉｔｈＰｕｌｓｅｗｉｄｔｈＡｄｊｕｓｔａｂｌｅＡｂｉｌｉｔｙＤｏｕｂｌｅＦｒｅｑｕｅｎｃｙＮｄ：ＹＡＧＬａｓｅｒＳｙｓｔｅｍ￥ＬＩＹｕｌｉｎ；ＪＩＺｈｏｎｇｙｉｎｇ；ＷＡＮＧＺｈｅｎｇｒｏｎｇ；ＬＩＧｕ...     

High power Nd:YAG slab laser sidepumped by diode laser array

ＨｉｇｈｐｏｗｅｒＮｄ：ＹＡＧｓｌａｂｌａｓｅｒｓｉｄｅｐｕｍｐｅｄｂｙｄｉｏｄｅｌａｓｅｒａｒｒａｙＣＨＥＮＹｏｕｍｉｎｇ；ＺＨＯＵＦｕｚｈｅｎｇ；ＨＵＷｅｎｔａｏ；ＬＩＺｈｉｓｈｅｎ；ＹＡＮＧＸｉａｎｇｃｈｕｎ；ＷａｎｇＺｈｉｊｉａｎｇ（Ｓｈａｎ...