Diode-pumped Nd: YAG/LBO CW yellow laser at 588.9 nm

Inrecentyears,diode pumpedall solid statelasersin blue[1],green[2]andred[3]spectralreginsofintracavity frequencydoublingweredeveloped,becauseoftheirpromisingadvantages,suchasdesignsimplicity,highef ficiency,structurecompactness.Inmedicine,opticaltes ting,andcolordisplaytechnology[4],laserradiationfrom 550nmto650nmisrequired.Inparticular,theyellow laserat588.9nmradiationisveryclosetotheSodium D2atwavelength589nm,thereforeitwillbecomeani dealsourceinsteadofSodiumlamp.Atpresent,thesol id state…     

Multipass diode-pumped Nd:YAG optical amplifiers at 1.06 μm and1.32 μm

We have built two versions of a diode-pumped Nd:YAG amplifier using a compact multipass confocal geometry with a fiber-coupled input. This confocal geometry provided efficient power and high gain in a volume of approximately 100 cm³. When pumped with a commercially mature 2 W 809 nm laser diode, the 1.06 μm version produced 460 mW and a small signal gain of 51 dB. The 1.32 μm version produced 170 mW and a small signal gain of 29 dB. Such an efficient amplifier, especially at 1.32 μm would be useful as a power booster in fiber optic telecommunications     

Tunable laser-diode-pumped Nd:YAG microcrystal lasers at 1.4 μm

TEM₀₀ laser operation of a monolithic Nd:YAG crystal laser has been achieved on three transitions at 1.414 μm, 1.444 μm and at 1.431 μm with laser diode pumping at 808 nm. The laser threshold was 1.5 W and the maximum output power 50 mW. The gain linewidths at 1.414 μm and 1.444 μm were determined by means of temperature tuning the microcrystal lasers. Calculations for designing tunable single frequency microcrystal lasers have been performed     

CW 100 kW radio frequency-free-electron laser design at 10 μm

The authors describe the 100 kW continuous-wave (CW) radio frequency free-electron laser at 10 μm to be built at Boeing Defense and Space Group in collaboration with Los Alamos National Laboratory. The authors discuss the criteria which led to the selection of the operating point. The authors outline the single-accelerator master-oscillator power-amplifier concept. This approach and the wavelength were chosen on the basis of maximum cost-effectiveness, including utilization of existing hardware, reasonable technical risk, and potential for future applications. The major experimental goals for the average power laser experiment (APLE) program are discussed, and the expected performance is considered     

波长1319nm连续Nd:YAG激光器的研究

使用连续Nd：YAG输出1319nm，分析了波长1319nm激光的辐射跃迁能级，论述了抑制1064nm激光的生成从而提高1319nm激光输出等关键技术，研究了光学镜片的镀膜参数与腔型结构，实现1319nm激光连续输出最高功率43W。     

15 W diode-side-pumped Tm:YAG waveguide laser at 2 μm

The high-power side-pumped operation of a double-clad Tm:YAG waveguide laser at 2.02 μm, using two proximity-coupled 20 W diode pump lasers, is reported. A slope efficiency of 43% was observed with respect to incident diode power, giving a maximum output power of 15 W. The double-clad geometry ensures diffraction-limited output in the guided plane     

二极管横向抽运Nd:YAG大功率1.319μm单模激光器

对二极管横向抽运1.319μm大功率Nd:YAG激光器进行实验研究.采用横向抽运方式(CEO公司RD module),以φ4×115(单位mm)Nd:YAG晶体为激光工作物质,通过谐振腔设计和小孔光阑相结合的手段抑制高阶模的振荡,选取单横模,并且达到补偿晶体的较大热效应、提高单模的模式竞争能力的目的.在抽运光功率为343 W的条件下,得到功率大于6 W的TEM00模1.319μm连续激光输出,光束质量因子M2＜2,激光功率不稳定度低于2%,最大光-光转换效率约为1.74%.     

11.5-W CW 1.83-μm diode laser array

We demonstrate high-power operation of both individual broad-waveguide separate-confinement-heterostructure quantum-well InGaAsP-InP laser diodes and 1-cm-wide arrays emitting at 1.83 μm. Despite strong dependence of threshold current density and diode efficiency on operating temperature, a continuous-wave output power of 2.1 W has been obtained for 100-μm-aperture lasers with 2-mm-long cavities. An output power of 11.5 W was reached for ten element 1-cm-wide array at a heatsink temperature of 16°C     

串接高功率连续Nd:YAG激光器方向性的改善

在多个激活元件激光器中,为了补偿棒的热聚焦效应,对激光棒进行了端面修磨.在两根棒串接的连续激光器中,实验上获得了发散角小于10毫弧度的100～150瓦的多模激光输出.     

High power semiconductor laser injection-locking at 1.3 μm

The injection-locking properties of a high power antireflection coated 1.3-μm slave laser subjected to relatively low injection powers from a distributed feedback (DFB) laser and from a tunable external cavity laser have been investigated. Narrow linewidth operation (~40 kHz) was demonstrated and the tuning range within two slave modes (~10 GHz) and over the gain profile (~40 nm) was investigated. In addition, the tracking properties of the slave laser for both frequency and phase modulated injected light was evaluated at 1 Gb/s, in which the fidelity was judged from bit-error-rate measurements. The maximum locked power under 1 Gb/s frequency modulation was about 145 mW, limited by the available master power; approximately 300 μW was injected into the slave     

1-W CW Tm-doped fluoride fibre laser at 1.47 mu m

A 1 W CW Tm-doped fluoride fibre laser operating at 1.47 mu m and using an upconversion pump scheme is demonstrated. The pump source is an LD pumped Nd:YAG laser operating at 1.064 mu m. The threshold and slope efficiency are 175 mW and 29%, respectively. Tunable operation from 1.445 to 1.51 mu m is observed.<>     

Diode-pumped actively Q-switched Nd： YAG laser at 946 nm

A diode-pumped Nd： YAG acousto-optically（A-O） Q-switched laser at wavelength 946 nm formed with a simple plane-plane cavity has been demonstrated. The maximum average output power was 850 mW. The highest peak power was 531 W with the pulse repetition rate of 20 kHz and pulse width of 80 ns at the incident pump power of 19.5 W.     

准连续660nm Nd:YAG内腔倍频激光器的研究

研制了一台Nd:YAG内腔倍频输出660nm红光激光器。分析了腔长地激光功率的影响，采用新型径向调整式光学镜片调整架，平－平腔结构，腔长390nm，双灯泵浦，KTP晶体内腔倍频，并设置声光Q开关，获得660nm红光输出2W。     

Laser-diode-array end-pumped 8.2-W CW Nd : GdVO/sub 4/ laser at 1.34 /spl mu/m

A laser-diode-array end-pumped 0.3-at.% Nd-doped GdVO/sub 4/ high-power continuous-wave (CW) laser operating at 1.34 /spl mu/m has been demonstrated. The maximum CW output power of 8.23 W was obtained at the incident pump power of 27.9 W, giving the corresponding optical conversion efficiency of 29.5% and the average slope efficiency of 30.2%. Two Nd : GdVO/sub 4/ crystals with Nd/sup 3+/ concentration of 0.5 and 1.14 at.% were also investigated for the comparison to show the advantage of lowly Nd-doped crystals applied to high-power lasers.     

连续Nd∶YAG稳频倍频激光器

在连续稳频Nd:YAG激光器的基础上,重新设计了腔形,使用角度匹配的KTP和MgO:LiNbO_3晶体倍频。在输入功率为2.5kW时,获得基频光800mW输出,强度波动小于2％,频率稳定性优于2MHz。同时获得50～100mW的倍频光输出,强度波动小于5％,频率稳定性优于5MHz。     

激光二极管端面抽运的多晶Nd：YAG 1．06μm连续激光器

报道了激光二极管端面抽运的多晶Nd：YAG(polycrystalline Nd：YAG ceramic)1．06μm连续激光器的实验研究。在抽运功率为0．3W时，激光达到阈值开始输出；在抽运功率为9W时．输出功率达到2W，激光器光-光转换效率为22．2％。     

二极管侧面泵浦连续固体激光器的研究

本文详细介绍了一个台量大输出功率的37W的二极管侧面泵浦连续固体激光器。并对不同输出功率下的光束质量进行了测量,同时还测量了冷却水温对激光器输出功率的影响。     

激光二极管端面泵浦的多晶Nd:YAG 1.32μm连续激光器

本文报道了激光二极管端面泵浦的多晶Nd：YAG(Polycrystalline Nd:YAG ceramic)1．32μm连续激光器的实验研究．在泵浦功率为2．1W时，激光达到阈值开始输出；在泵浦功率为9W时，输出功率达到690mW，斜率效率为11％．据我们所知，这是目前报道的功率最大的多晶Nd：YAGl．32μm连续激光器。     

激光二极管泵浦可调频差双频固体激光器

研究了可调频差范围0～1.5 GHz的LD泵浦可调频差的双频固体激光器.激光增益介质是2 mm厚的1 at%掺杂Nd:YAG波片,利用端面泵浦和F-P标准具的选模得到单频连续输出,在单频的基础上将λ/4波片加入谐振腔中,造成本征光频率分裂,实现频差连续可调的双频激光输出.采用琼斯矩阵分析光腔内的本征值及本征向量,证明了双频激光两个电矢量偏振态之间总是正交的.两个偏振激光频率间隔由改变λ/4波片快轴之间的交角实现调谐.实验中得到80 MHz-1.3 GHz范围可调频差的双频激光输出,最大输出功率85 mW.