共查询到20条相似文献,搜索用时 15 毫秒
1.
详细介绍了平板波导二极管(LD)抽运高功率同体激光器的进展,分析了系统的优点和潜在的风险。具体讨论了接近式LD耦合方式、双包层波导结构和非稳腔的使用,以及梯形结构波导、集成被动调Q设计。激光介质包括Yb^3 ,Nd^3 和Tm^3 掺杂的YAG晶体材料。具有单片紧凑波导结构的激光器可以获得超过10W的激光输出,获得近衍射极限的激光束。将来可以实现100W以上的激光输出并在单片器件内集成更多的功能。 相似文献
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Quantum cascade lasers grown by metal organic vapour phase epitaxy (MOVPE) with high peak output power of 1.3 W at 300 K emitting a wavelength of 9.8 mum are reported. The devices are processed in wide ridge waveguide structures with an air-semiconductor interface to confine the laser optical mode. This design increases the optical overlap factor and reduces waveguide losses. 相似文献
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Webjorn J. Siala S. Nam D.W. Waarts R.G. Lang R.J. 《Quantum Electronics, IEEE Journal of》1997,33(10):1673-1686
This paper reviews nonlinear quasi-phase-matching (QPM) waveguides and laser diodes with application to conversion of infrared laser diode wavelengths to the visible. The discussion of nonlinear QPM waveguides includes Ti-diffusion poled and E-field poled LiNbO3 and KTP waveguides. Up to 25 mW of blue output power has been demonstrated for 120-mW infrared power injected into a nonlinear waveguide. Semiconductor laser sources suitable for frequency doubling are discussed, including distributed Bragg reflection (DBR) lasers operating at up to 200 mW output power, master oscillator power amplifiers with over 1 W output power, and wavelength-tunable flared semiconductor lasers with over 0.5 W output. A compact blue laser with 1-4 mW output power at 425-nm wavelength has been demonstrated based on a DBR laser frequency doubled in a nonlinear waveguide 相似文献
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准连续17 kW 808 nm GaAs/AlGaAs叠层激光二极管列阵 总被引:4,自引:5,他引:4
高功率激光二极管列阵广泛应用于抽运固体激光器.报道了17 kW GaAs/AlGaAs叠层激光二极管列阵的设计、制作过程和测试结果.为了提高器件的输出功率,一方面采用宽波导量子阱外延结构,降低腔面光功率密度,提高单个激光条的输出功率,通过金属有机物化学气相沉积(MOCVD)方法进行材料生长,经过光刻、金属化、镀膜等工艺制备1 cm激光条,填充密度为80%,单个激光条输出功率达100 W以上;另一方面器件采用高密度叠层封装结构,提高器件的总输出功率,实现了160个激光条叠层封装,条间距0.5 mm.经测试,器件输出功率达17kW,峰值波长为807.6 nm,谱线宽度为4.9 nm. 相似文献
5.
非对称异质波导半导体激光器结构 总被引:1,自引:0,他引:1
提出了一种非对称异质波导半导体激光器外延结构,即通过优化选择材料体系和结构厚度,对器件外延层的P侧限制结构和N侧限制结构分别设计,从而降低器件的电压损耗,使其满足高输出功率以及高的电光转换效率的要求.从载流子的输运和限制等微观机制出发,对器件的主要输出特性进行了理论分析和数值模拟,并以此为根据设计和制作了一种1060 nm In Ga As/Ga As单量子阱非对称异质波导结构半导体激光器,并对器件的主要输出特性进行了测试.实验结果表明,非对称异质结构是降低器件的电压降、增大限制结构对注入载流子的限制,提高半导体激光器电光转换效率的有效措施. 相似文献
6.
为了制备大功率、单横模输出的量子点激光器,对有源多模干涉波导结构进行了研究。通过优化器件结构设计,采用1×1型有源多模干涉波导结构,以均匀多层InAs/InGaAs/GaAs量子点材料作为有源区,制备了1.3μm波段的有源多模干涉结构量子点激光器。连续电流注入条件下的测试结果表明,与传统的均匀波导结构器件相比,有源多模干涉结构器件具有更低的串联电阻和更好的散热性能;在连续电流为0.5A的小注入情况下,器件的输出功率可达114mW、中心波长为1332nm。结果表明,有源多模干涉结构器件是制备大功率、单横模输出光发射器件的一种有效的器件结构。 相似文献
7.
Tomoshi Matsushima Tadasi Sueta 《Journal of Infrared, Millimeter and Terahertz Waves》1997,18(3):627-632
A side-wall emitting ZnSe/AlN waveguide CO2 laser, which is able to extract the output power from the waveguide wall, is proposed. In the proposed scheme, four polished AlN plates are cemented to form a 16 cm long waveguide with 1.9×1.9 mm2 cross section. One of the AlN plates is partially replaced by the ZnSe plate. This part is used as an output window. To confirm the workability of the proposed scheme, a trial laser was constructed and tested. The output power of several milliwatts was observed from the ZnSe waveguide wall. 相似文献
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高功率GaN基激光二极管外延结构理论仿真对提高GaN基激光二极管的光电性能具有重要的指导意义。设计了一种n侧双波导结构的绿光激光二极管外延结构,讨论了激光器外延结构中n-InxGa1?xN波导层中铟组分对其光电性能的影响,揭示了n-InxGa1?xN波导层对激光二极管光电性能的影响机制。通过调控n-InxGa1?xN波导层中铟组分,调控外延层中的光场分布,使光场发生了偏移。结果表明,当n侧InxGa1?xN波导层中铟组分最佳值为0.07时,将光子损耗降低了0.2 cm?1,阈值电流由193.49 mA降低到115.98 mA,此外,器件的光子损耗最少,阈值电流最小,工作电压最低,从而提高了激光二极管的输出功率和电光转换效率。因此,当绿光激光二极管的注入电流密度为6 kA/cm2时,功率输出达234.95 mW。n侧双波导结构设计为制备高功率绿光激光二极管提供了理论指导和数据支撑。 相似文献
9.
Mackenzie J.I. Cheng Li Shepherd D.P. Beach R.J. Mitchell S.C. 《Quantum Electronics, IEEE Journal of》2002,38(2):222-230
A plane-wave model accounting for cross-relaxation, upconversion, ground-state depletion, and gain saturation in continuous-wave laser systems is applied to side-pumped Tm:YAG double-clad planar waveguides. The temperature profile due to high-power pumping, and the delivery and absorption efficiencies of proximity-coupled diode bars, are also calculated. The theoretical performance is found to be a good fit to the experimental results, which show 15-W output at 2 μm from 43 W of diode pump power. The output channels for the absorbed power are quantified, and it is shown that upconversion limits the gain and, hence, the size of the output coupling that can be used in such lasers. The same theory is then used to design a very compact waveguide laser capable of delivering 100 W of output power 相似文献
10.
设计了980nm非对称宽波导InGaAs/InGaAsP量子阱激光器,并在结构中插入电流阻挡层,有效地阻止载流子的泄露。用LASTIP软件对980nm非对称宽波导量子阱激光器进行理论模拟,与传统的980nm对称宽波导量子阱激光器相比,非对称宽波导量子阱激光器波导和量子阱之间有更小的能带差,非对称宽波导结构具有更低的阈值电流,更高的斜效率以及更低的阻抗,所以带有电流阻挡层的980nm非对称宽波导InGaAs/InGaAsP量子阱激光器有更高的光电转换效率和输出功率。 相似文献
11.
ZHUZhiwen CAIKaiqing 《半导体光子学与技术》1995,1(1):62-66
The design,fabrication and performance of 1.3цm superluminescent diodes are reported.A InP window structure and a passive absorber waveguide in different plane are applied to suppress lasing oscillation.A buried crescent structure similar to a laser diode is introduced to achieve high output power.The output power of about 700цW is coupled into a single-mode fiber at 150mA and 25℃.Spectrum width is more than 30nm.The devices operate in superluminescent state in the range from0℃to 60℃. 相似文献
12.
Baumann I. Brinkmann R. Dinand M. Sohler W. Westenhofer S. 《Quantum Electronics, IEEE Journal of》1996,32(9):1695-1706
The development of a Fabry-Perot-type Ti,Er:LiNbO3 waveguide laser of optimized CW output power up to 63 mW (λs =1561 nm) at a pump power level of 210 mW (λp=1480 nm) and a slope efficiency of up to 37% is reported. The theoretical model for the waveguide laser is presented and applied to determine the optimum resonator configuration using waveguide parameters obtained from a detailed characterization of the laser sample. With pulsed pumping, waveguide laser pulses of up to 6.2 W peak power were observed. Apart from residual relaxation oscillations, the laser emission proved to be shot-noise limited 相似文献
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本文介绍小型全固体电路RF CO2波导激光器电源的设计和调试方法.该电源连续波工作时,工作频率f=120MHz,输出最大连续功率W=160W,脉冲工作时,调制频率fx=0~10kHz的方波连续可调,占空比连续可调. 相似文献
16.
Kidoguchi I. Karniyama S. Adachi H. Mannoh M. Ban Y. Ohnaka K. 《Photonics Technology Letters, IEEE》1994,6(6):684-686
AlGaInP visible laser diode with lateral leaky waveguide structure employing 0.025 of negative refractive index step have been fabricated. In comparison to conventional loss guided structure, lateral leaky waveguide structure indicated stable fundamental mode operation. The output power at kink for lateral leaky waveguide laser was around 1.5 times higher than loss guided structure for same stripe widths. The stability was attributed to large mode discrimination against higher order mode. The lateral leaky waveguide laser with 560 μm cavity length employing the antireflection (5%)/high reflection (82%) showed 66 mW of output power with no kinks at 25°C 相似文献
17.
针对大功率固态放大器进行多模块功率合成的需要,设计了一种S频段8路大功率径向波导合成器,用来实现kW级的功率合成输出。介绍了径向波导合成器的工作原理,进行了径向波导合成器的结构设计和电磁分析,提出了设计中的关键技术。运用高频结构仿真器(HFSS)仿真软件进行了建模、仿真,并对样机测试结果与仿真结果进行了对比分析,表明该S频段大功率径向波导合成器指标满足设计要求。 相似文献
18.
共掺Er3+:Yb3+磷酸盐玻璃光波导激光器的模拟 总被引:1,自引:0,他引:1
在速率方程和传输方程理论模型的基础上用有限元法和龙格一库塔(RK)算法模拟了共掺Er^2 :Yb^3 的磷酸盐玻璃光波导激光器功率输出特性。理论分析的结果表明用长度较短的重掺杂波导并优化激光器的输出反射镜的反射率时,可以获得较高的功率输出和斜率效率,其抽运阈值也较低。 相似文献
19.
J.P. Zhang D.Y. Chu S.L. Wu W.G. Bi R.C. Tiberio C.W. Tu S.T. Ho 《Photonics Technology Letters, IEEE》1996,8(8):968-970
We have obtained directional light output from a recently realized InGaAsP photonic-wire microcavity ring lasers. The output was achieved by fabricating a 0.45-/spl mu/m-wide U-shape waveguide next to a 10-/spl mu/m diameter microcavity ring laser. The laser has a threshold pump power of around 124 /spl mu/W when optically pumped at 514 nm. It is comparable to the former structure without output coupling. The output coupling efficiency can be controlled carefully by choosing the spacing between the laser cavity and the waveguide. 相似文献