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High-Power Continuous-Wave and Acousto-Optical Q-Switched Ho:(Sc_(0.5)Y_(0.5))_2SiO_5 Laser Pumped by Laser Diode
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作者 Xiao-Ming Duan Guang-Peng Chen +2 位作者 Ying-Jie Shen Li-He Zheng Liang-Bi Su 《Chinese Physics Letters》 SCIE CAS CSCD 2019年第6期29-32,共4页
We experimentally investigate the continuous-wave(cw)and acousto-optical(AO)Q-switched performance of a diode-pumped Ho:(Sc_(0.5)Y_(0.5))_2SiO_5(Ho:SYSO)laser.A fiber-coupled laser diode at 1.91m is employed as the pu... We experimentally investigate the continuous-wave(cw)and acousto-optical(AO)Q-switched performance of a diode-pumped Ho:(Sc_(0.5)Y_(0.5))_2SiO_5(Ho:SYSO)laser.A fiber-coupled laser diode at 1.91m is employed as the pump source.The cw Ho:SYSO laser produces 13.0 W output power at 2097.9 nm and 56.0%slope efficiency with respect to the absorbed pump power.In the AO Q-switched regime,at a pulse repetition frequency of 5 kHz,the Ho:SYSO laser yields 2.1 mJ pulse energy and 21 ns pulse width,resulting in a calculated peak power of 100 k W.In addition,at the maximum output level,the beam quality factor of the Q-switched Ho:SYSO laser is measured to be about 1.6. 展开更多
关键词 high-power continuous-wave Acousto-Optical laser Diode
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High-Power Continuous-Wave Nd:GdVO4 Solid-State Laser Dual-End-Pumped at 880 nm
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作者 毛叶飞 张恒利 +5 位作者 桑思晗 张新 余西龙 邢冀川 辛建国 江毅 《Chinese Physics Letters》 SCIE CAS CSCD 2015年第9期43-45,共3页
A high-power cw all-solid-state Nd:GdVO4 laser operating at 88Onto is reported. The laser consists of a low doped level Nd:GdV04 crystal dual-end-pumped by two high-power diode lasers and a compact negative confocM ... A high-power cw all-solid-state Nd:GdVO4 laser operating at 88Onto is reported. The laser consists of a low doped level Nd:GdV04 crystal dual-end-pumped by two high-power diode lasers and a compact negative confocM unstable-stable hybrid resonator. At an incident pump power of 820 W, a maximum cw output of 240 W at 1064nm is obtained. The optical-to-optical efficiency and Mope efficiency are 40.7% and 53.2%, respectively. The M2 factors in the unstable direction and in the stable direction are 4.38 and 5.44, respectively. 展开更多
关键词 Nd high-power continuous-wave Nd:GdVO4 Solid-State laser Dual-End-Pumped at 880 nm
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Analysis of high-power disk laser welding stability based on classification of plume and spatter characteristics 被引量:6
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作者 高向东 文茜 Seiji KATAYAMA 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2013年第12期3748-3757,共10页
Classification of plume and spatter images was studied to evaluate the welding stability. A high-speed camera was used to capture the instantaneous images of plume and spatters during high power disk laser welding. Ch... Classification of plume and spatter images was studied to evaluate the welding stability. A high-speed camera was used to capture the instantaneous images of plume and spatters during high power disk laser welding. Characteristic parameters such as the area and number of spatters, the average grayscale of a spatter image, the entropy of a spatter grayscale image, the coordinate ratio of the plume centroid and the welding point, the polar coordinates of the plume centroid were defined and extracted. Karhunen-Loeve transform method was used to change the seven characteristics into three primary characteristics to reduce the dimensions. Also, K-nearest neighbor method was used to classify the plume and spatter images into two categories such as good and poor welding quality. The results show that plume and spatter have a close relationship with the welding stability, and two categories could be recognized effectively using K-nearest neighbor method based on Karhunen-Loeve transform. 展开更多
关键词 high-power disk laser welding PLUME SPATTER feature classification STABILITY
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High powerλ~8.5μm quantum cascade laser grown by MOCVD operating continuous-wave up to 408 K 被引量:8
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作者 Teng Fei Shenqiang Zhai +10 位作者 Jinchuan Zhang Ning Zhuo Junqi Liu Lijun Wang Shuman Liu Zhiwei Jia Kun Li Yongqiang Sun Kai Guo Fengqi Liu Zhanguo Wang 《Journal of Semiconductors》 EI CAS CSCD 2021年第11期55-60,共6页
Robust quantum cascade laser(QCL)enduring high temperature continuous-wave(CW)operation is of critical importance for some applications.We report on the realization of lattice-matched InGaAs/InAlAs/InP QCL materials g... Robust quantum cascade laser(QCL)enduring high temperature continuous-wave(CW)operation is of critical importance for some applications.We report on the realization of lattice-matched InGaAs/InAlAs/InP QCL materials grown by metal-organic chemical vapor deposition(MOCVD).High interface quality structures designed for light emission at 8.5μm are achieved by optimizing and precise controlling of growth conditions.A CW output power of 1.04 W at 288 K was obtained from a 4 mm-long and 10μm-wide coated laser.Corresponding maximum wall-plug efficiency and threshold current density were 7.1%and 1.18 kA/cm2,respectively.The device can operate in CW mode up to 408 K with an output power of 160 mW. 展开更多
关键词 quantum cascade laser metal-organic chemical vapor deposition continuous-wave interface roughness
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Continuous-wave optical enhancement cavity with 30-kW average power
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作者 柳兴 陆心怡 +6 位作者 王焕 颜立新 李任恺 黄文会 唐传祥 Ronic Chiche Fabian Zomer 《Chinese Physics B》 SCIE EI CAS CSCD 2023年第3期258-261,共4页
Optical enhancement cavity(OEC)is a powerful tool for fundamental research and diagnostics.In this paper,the progress of a continuous-wave OEC to realize of megawatt cavity for a novel light source based on a steady-s... Optical enhancement cavity(OEC)is a powerful tool for fundamental research and diagnostics.In this paper,the progress of a continuous-wave OEC to realize of megawatt cavity for a novel light source based on a steady-state microbunching(SSMB)mechanism,is reported.After efficiently suppressing all external noise and optimizing the alignment,mode-matching,and polarization matching,stable and long-term locking is achieved with the help of two feedback loops.The modal instability phenomenon caused by the surface thermoelastic deformation is observed.A pair of D-shape mirrors are utilized to remove the high-order modes.Finally,an intra-cavity average power of 30 kW is reached. 展开更多
关键词 optical enhancement cavity continuous-wave laser modal instability high power cavity
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Continuous-wave operation of InAs/InP quantum dot tunable external-cavity laser grown by metal-organic chemical vapor deposition 被引量:3
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作者 Yan Wang Shuai Luo +2 位作者 Haiming Ji Di Qu Yidong Huang 《Chinese Physics B》 SCIE EI CAS CSCD 2021年第1期568-571,共4页
We demonstrate high-performance broadband tunable external-cavity lasers(ECLs) with the metal-organic chemical vapor deposition(MOCVD) grown In As/In P quantum dots(QDs) structures. Without cavity facet coatings, the ... We demonstrate high-performance broadband tunable external-cavity lasers(ECLs) with the metal-organic chemical vapor deposition(MOCVD) grown In As/In P quantum dots(QDs) structures. Without cavity facet coatings, the 3-d B spectral bandwidth of the Fabry–Perot(FP) laser is approximately 10.8 nm, while the tuning bandwidth of ECLs is 45 nm.Combined with the anti-reflection(AR)/high-reflection(HR) facet coating, a 92 nm bandwidth tuning range has been obtained with the wavelength covering from 1414 nm to 1506 nm. In most of the tuning range, the threshold current density is lower than 1.5 k A/cm2. The maximum output power of 6.5 m W was achieved under a 500 m A injection current.All achievements mentioned above were obtained under continuous-wave(CW) mode at room temperature(RT). 展开更多
关键词 InAs/InP quantum dot external-cavity laser continuous-wave operation metal-organic chemical vapor deposition
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Generation of Continuous-Wave 194 nm Laser for Mercury Ion Optical Frequency Standard 被引量:4
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作者 邹宏新 伍越 +2 位作者 陈国柱 沈咏 刘曲 《Chinese Physics Letters》 SCIE CAS CSCD 2015年第5期73-77,共5页
A 194-nm cw laser is an essential part in the mercury ion optical frequency standard. We report the generation of over 2mW continuous-wave radiation at 194nm in a beta barium borate crystal using a simple sum frequenc... A 194-nm cw laser is an essential part in the mercury ion optical frequency standard. We report the generation of over 2mW continuous-wave radiation at 194nm in a beta barium borate crystal using a simple sum frequency mixing (SFM) system. One source beams at 718nm is resonantly enhanced with a cavity and the other at 266mn makes a single pass. Considering the walk-off effect in SFM, the source beam waists are designed to be elliptical, thus the conversion efficiency can be promoted. The 266-nm beam produced by frequency doubling of 532-nm laser is shaped close to the diffraction limit to achieve better mode matching. 展开更多
关键词 Generation of continuous-wave 194 nm laser for Mercury Ion Optical Frequency Standard BBO SFM
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Low Power Consumption Distributed-Feedback Quantum Cascade Lasers Operating in Continuous-Wave Mode above 90℃ at λ~7.2μm 被引量:2
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作者 赵越 张锦川 +5 位作者 贾志伟 刘颖慧 卓宁 翟慎强 刘峰奇 王占国 《Chinese Physics Letters》 SCIE CAS CSCD 2016年第12期50-53,共4页
We report on the design and fabrication of λ-7.2μm distributed feedback quantum cascade lasers lot very high temperature cw operation and low electrical power consumption. The cw operation is reported above 90℃. Fo... We report on the design and fabrication of λ-7.2μm distributed feedback quantum cascade lasers lot very high temperature cw operation and low electrical power consumption. The cw operation is reported above 90℃. For a 2-mm-long and 10-μm-wide laser coated with high-reflectivity on the rear facet, more than 170mW of output power is obtained at 20℃ with a threshold power consumption of 2.4 W, corresponding to 30mW with a threshold power consumption of 3.9 W at 90℃. Robust single-mode emission with a side-mode suppression ratio above 25 dB is continuously tunable by the heat sink temperature or injection current. 展开更多
关键词 QCL DFB on of Low Power Consumption Distributed-Feedback Quantum Cascade lasers Operating in continuous-wave Mode above 90 at in
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High-Power Single-Spatial-Mode GaSb Tapered Laser around 2.0 μm with Very Small Lateral Beam Divergence 被引量:3
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作者 黄书山 张宇 +5 位作者 廖永平 杨成奥 柴小力 徐应强 倪海桥 牛智川 《Chinese Physics Letters》 SCIE CAS CSCD 2017年第8期59-62,共4页
We report high-power single-spatial-mode type-I GaSb-based tapered lasers fabricated on the InGaSb/AlGaAsSb material system. A straight ridge and three different tapered waveguide structures with varying flare angles ... We report high-power single-spatial-mode type-I GaSb-based tapered lasers fabricated on the InGaSb/AlGaAsSb material system. A straight ridge and three different tapered waveguide structures with varying flare angles are fabricated to optimize the output power and spatial-mode performance. The best devices exhibit single-spatial-mode operation with room-temperature output power up to 350?mW in continuous-wave mode at an emission wavelength around 2.0?μm with a very small far-field lateral divergence angle, which is beyond state of the art in terms of single-spatial-mode output power. 展开更多
关键词 high-power Single-Spatial-Mode GaSb Tapered laser around 2.0 m with Very Small Lateral Beam Divergence
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Continuous-Wave and Actively Q-Switched Diode-Pumped Er:LuAG Ring Laser at 1650 nm 被引量:1
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作者 戴通宇 徐旭光 +4 位作者 鞠琳 吴婧 张振国 姚宝权 张晔 《Chinese Physics Letters》 SCIE CAS CSCD 2016年第6期45-48,共4页
We demonstrate a cw and actively Q-switched Er:LuAO laser resonantly dual-end-pumped by 1532nm fibre- coupled laser diodes. A maximum cw output power of 1.9W at 1650.3nm is obtained at a pump power of 25.5 W, corresp... We demonstrate a cw and actively Q-switched Er:LuAO laser resonantly dual-end-pumped by 1532nm fibre- coupled laser diodes. A maximum cw output power of 1.9W at 1650.3nm is obtained at a pump power of 25.5 W, corresponding to a slope efficiency of 43.3 %. In the Q-switched regime, the maximum pulse energy of 3.51 mJ is reached at a pulse repetition rate of 100 Hz, a pulse duration of 90.5ns and a pump power of 25.5 W. At the repetition rate of 400 Hz, the output energy is 2.12m J, corresponding to a pulse duration of 125.4 ns. 展开更多
关键词 LUAG as it in IS on continuous-wave and Actively Q-Switched Diode-Pumped Er:LuAG Ring laser at 1650 nm of
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A new method for measuring the pulse-front distortion of arbitrary shapes in high-power ultrashort laser systems 被引量:1
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作者 左言磊 蒋东镔 +4 位作者 朱启华 董军 曾小明 黄小军 黄征 《Chinese Physics B》 SCIE EI CAS CSCD 2012年第3期244-247,共4页
We present a new method that can be used to calculate pulse-front distortion by measuring the spectral interference of two point-diffraction fields in their overlapped district. We demonstrate, for the first time, the... We present a new method that can be used to calculate pulse-front distortion by measuring the spectral interference of two point-diffraction fields in their overlapped district. We demonstrate, for the first time, the measurement of the pulse-front distortion of the pulse from a complex multi-pass amplification system, which exists in almost all high-power laser systems, and obtain the irregular pulse-front distribution. The method presented does not need any reference light or assumption about the pulse-front distribution, and has an accuracy of several femtoseconds. 展开更多
关键词 pulse-front distortion multi-pass amplification high-power laser system
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High-Power Passively Q-Switched Nd:YAG Laser at 1112 nm with a Cr^(4+):YAG Saturable Absorber 被引量:1
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作者 敦洋洋 李平 +1 位作者 陈晓寒 马宝民 《Chinese Physics Letters》 SCIE CAS CSCD 2016年第2期30-33,共4页
A high-power passively Q-switched Nd:YAG laser operating at lll2nm with Cr4+:yAO as a saturable absorber is demonstrated. Under 808 nm diode-direct pumping, the maximum average output power of 2.73 W is achieved at... A high-power passively Q-switched Nd:YAG laser operating at lll2nm with Cr4+:yAO as a saturable absorber is demonstrated. Under 808 nm diode-direct pumping, the maximum average output power of 2.73 W is achieved at the pump power of 16.65 W, corresponding to an optical-to-optical conversion efficiency of 16.4%. At the same time, the pulse width, pulse repetition rate, single pulse energy and peak power are 27.2ns, 9 kHz, 303.3#3 and 11.2kW, respectively. As far as we know, the result gives the highest average output power at 1112nm generated by an 808 nm diode-end-pumped Nd:YAG laser. 展开更多
关键词 YAG Saturable Absorber high-power Passively Q-Switched Nd:YAG laser at 1112 nm with a Cr NM of ND with
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A kW Continuous-Wave Ytterbium-Doped All-Fiber Laser Oscillator with Domestic Fiber Components and Gain Fiber 被引量:1
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作者 廖雷 刘鹏 +6 位作者 邢颍滨 王一礴 彭景刚 戴能利 李进延 何兵 周军 《Chinese Physics Letters》 SCIE CAS CSCD 2015年第6期57-60,共4页
We demonstrate a kW continuous-wave ytterbium-doped all-fiber laser oscillator with M1 domestic fiber compo- nents: a 7× I fused fiber bundle combiner, a fiber Bragg grating and a double-clad gain fiber. The osc... We demonstrate a kW continuous-wave ytterbium-doped all-fiber laser oscillator with M1 domestic fiber compo- nents: a 7× I fused fiber bundle combiner, a fiber Bragg grating and a double-clad gain fiber. The oscillator operates at 1079.48nrn with 80.94% slope efficiency and shows no limit of temperature and nonlinear effects. These indicate that the passive fiber components and the gain fiber are all qualified for the high power environ- ment. No evidence of the signal power roll-over shows that this oscillator possesses the capacity to higher output with available pump power. 展开更多
关键词 A kW continuous-wave Ytterbium-Doped All-Fiber laser Oscillator with Domestic Fiber Components and Gain Fiber FBG SRS
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Elucidation of Metallic Plume and Spatter Characteristics Based on SVM During High-Power Disk Laser Welding 被引量:2
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作者 高向东 刘桂谦 《Plasma Science and Technology》 SCIE EI CAS CSCD 2015年第1期32-36,共5页
During deep penetration laser welding,there exist plume(weak plasma) and spatters,which are the results of weld material ejection due to strong laser heating.The characteristics of plume and spatters are related to ... During deep penetration laser welding,there exist plume(weak plasma) and spatters,which are the results of weld material ejection due to strong laser heating.The characteristics of plume and spatters are related to welding stability and quality.Characteristics of metallic plume and spatters were investigated during high-power disk laser bead-on-plate welding of Type 304 austenitic stainless steel plates at a continuous wave laser power of 10 kW.An ultraviolet and visible sensitive high-speed camera was used to capture the metallic plume and spatter images.Plume area,laser beam path through the plume,swing angle,distance between laser beam focus and plume image centroid,abscissa of plume centroid and spatter numbers are defined as eigenvalues,and the weld bead width was used as a characteristic parameter that reflected welding stability.Welding status was distinguished by SVM(support vector machine) after data normalization and characteristic analysis.Also,PCA(principal components analysis) feature extraction was used to reduce the dimensions of feature space,and PSO(particle swarm optimization) was used to optimize the parameters of SVM.Finally a classification model based on SVM was established to estimate the weld bead width and welding stability.Experimental results show that the established algorithm based on SVM could effectively distinguish the variation of weld bead width,thus providing an experimental example of monitoring high-power disk laser welding quality. 展开更多
关键词 high-power disk laser welding metallic plume spatter support vector machine
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Multi-wavelength continuous-wave Nd:YVO4 self-Raman laser under in-band pumping
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作者 Li Fan Xiao-Dong Zhao +4 位作者 Yun-Chuan Zhang Xiao-Dong Gu Hao-Peng Wan Hui-Bo Fan Jun Zhu 《Chinese Physics B》 SCIE EI CAS CSCD 2019年第8期184-189,共6页
Multi-wavelength continuous-wave self-Raman laser with an a-cut composite YVO4/Nd:YVO4/YVO4 crystal pumped by an 879-nm wavelength-locked laser diode is demonstrated for the first time.Multi-wavelength Raman lasers at... Multi-wavelength continuous-wave self-Raman laser with an a-cut composite YVO4/Nd:YVO4/YVO4 crystal pumped by an 879-nm wavelength-locked laser diode is demonstrated for the first time.Multi-wavelength Raman lasers at 1168.4,1176,1178.7,and 1201.6 nm are achieved by the first Stokes shift of the multi-wavelength fundamental lasers at 1064,1066.7,1073.6,1084,and 1085.6 nm with two Raman shifts of 890 and 816 cm^-1.A maximum Raman output power of 2.56 W is achieved through the use of a 20-mm-long composite crystal,with a corresponding optical conversion efficiency of 9.8%.The polarization directions of different fundamental and Raman lasers are investigated and found to be orthogonalπandσpolarizations.These orthogonally polarized multi-wavelength lasers with small wavelength separation pave the way to the development of a potential laser source for application in spectral analysis,laser radar and THz generation. 展开更多
关键词 MULTI-WAVELENGTH continuous-wave self-Raman laser in-band PUMPING
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Formation of choroidal neovascularization under macular fovea after high-power laser irradiation: a case report
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作者 Shan-Shan Li Xiao-Ran Chu Fang Chen 《International Journal of Ophthalmology(English edition)》 SCIE CAS 2020年第2期359-361,共3页
Dear Editor,I am Dr.Shan-Shan Li,from Northern Jiangsu People’s Hospital,Yangzhou,China.I write to present the case of formation of choroidal neovascularization(CNV)under the fovea after high-power laser irradiation.... Dear Editor,I am Dr.Shan-Shan Li,from Northern Jiangsu People’s Hospital,Yangzhou,China.I write to present the case of formation of choroidal neovascularization(CNV)under the fovea after high-power laser irradiation.Currently,there is an increasing availability and accessibility to laser instruments,but improper use of these tools can lead to macular damage and irreversible visual impairment. 展开更多
关键词 FFA a case report Formation of choroidal NEOVASCULARIZATION under MACULAR FOVEA AFTER high-power laser IRRADIATION
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Two-Photon Transitions of ^(85)Rb 5D_(5/2) State by Using an Optical Frequency Comb and a Continuous-Wave Laser
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作者 曹书凯 范鹏瑞 +3 位作者 张一驰 汪丽蓉 肖连团 贾锁堂 《Chinese Physics Letters》 SCIE CAS CSCD 2016年第2期26-29,共4页
A high-resolution two-photon spectrum of 5S1/2 → 5P3/2 → 5D5/2 transitions in a thermal SSRb vapor cell is presented by using an optical frequency comb and a cw laser. The fluorescence of 6P3/2 → 5S1/2 spontaneous ... A high-resolution two-photon spectrum of 5S1/2 → 5P3/2 → 5D5/2 transitions in a thermal SSRb vapor cell is presented by using an optical frequency comb and a cw laser. The fluorescence of 6P3/2 → 5S1/2 spontaneous emission is detected when the cw laser frequency is scanned from the 5S1/2 ground state to 5P3/2 hyperfine levels and the optical frequency comb repetition rate is fixed. The hyperfine splittings (Ff = 2-5) of the 5D5/2 excited state are well resolved. The dependences of fluorescence intensities on the cw laser intensity and temperature of SSRb vapor eel1 are studied, respectively. The experimental results are in good agreement with the theoretical analyses. 展开更多
关键词 Two-Photon Transitions of AS on IS Rb 5D State by Using an Optical Frequency Comb and a continuous-wave laser in by
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An accurate and stable method of array element tiling for high-power laser facilities
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作者 母杰 王逍 +7 位作者 景峰 李志林 程宁波 朱启华 粟敬钦 张军伟 周凯南 曾小明 《Chinese Physics B》 SCIE EI CAS CSCD 2015年第7期275-278,共4页
Due to laser-induced damage, the aperture of optics is one of the main factors limiting the output capability of highpower laser facilities. Because of the general difficulty in achieving large-aperture optics, an alt... Due to laser-induced damage, the aperture of optics is one of the main factors limiting the output capability of highpower laser facilities. Because of the general difficulty in achieving large-aperture optics, an alternative solution is to tile some small-aperture ones together. We propose an accurate, stable, and automatic method of array element tiling and verify it on a double-pass 1 × 2 tiled-grating compressor in the XG-III laser facility. The test results show the accuracy and stability of the method. This research provides an efficient way to obtain large-aperture optics for high-power laser facilities. 展开更多
关键词 array element tiling large-aperture optics high-power laser facility
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High-Power Dual-End-Pumped Actively Q-Switched Ho:YAG Ceramic Laser
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作者 段小明 袁晋鹤 +3 位作者 姚宝权 戴通宇 李江 潘裕柏 《Chinese Physics Letters》 SCIE CAS CSCD 2015年第10期34-36,共3页
We present a high-power Ho:YAG ceramic laser pumped at 1908nm. Using a dual-end-pumped structure, the maximum continuous-wave output power of 48 W is obtained, corresponding to a slope efficiency of 70.4% with respec... We present a high-power Ho:YAG ceramic laser pumped at 1908nm. Using a dual-end-pumped structure, the maximum continuous-wave output power of 48 W is obtained, corresponding to a slope efficiency of 70.4% with respect to the absorbed pump power. At actively Q-switched mode, the maximum average output power of 46 W and the minimum pulse width of 21 ns are achieved at a pulse repetition frequency of 20 kHz, corresponding to a peak power of approximately 109.5kW. In addition, the beam-quality M2 factor is found to be 1.4 at the maximum output power. 展开更多
关键词 YAG HO high-power Dual-End-Pumped Actively Q-Switched Ho:YAG Ceramic laser
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High-Power and High-Efficiency Operation of Terahertz Quantum Cascade Lasers at 3.3 THz
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作者 李媛媛 刘俊岐 +7 位作者 王涛 刘峰奇 翟慎强 张锦川 卓宁 王利军 刘舒曼 王占国 《Chinese Physics Letters》 SCIE CAS CSCD 2015年第10期41-43,共3页
A high-power and high-effciency GaAs/A1GaAs-based terahertz (THz) quantum cascade laser structure emitting at 3.3 THz is presented. The structure is based on a hybrid bound-to-continuum transition and resonant-phono... A high-power and high-effciency GaAs/A1GaAs-based terahertz (THz) quantum cascade laser structure emitting at 3.3 THz is presented. The structure is based on a hybrid bound-to-continuum transition and resonant-phonon extraction active region combined with a semi-insulating surface-plasmon waveguide. By optimizing material structure and device processing, the peak optical output power of 758mW with a threshold current density of 120 A/cm2 and a wall-plug effciency of 0.92% at 10K and 404mW at 77K are obtained in pulsed operation. The maximum operating temperature is as high as llS K. In the cw mode, a record optical output power of 160roW with a threshold current density of 178A/cm2 and a wall-plug efficiency of 1.32% is achieved at 1OK. 展开更多
关键词 high-power and High-Efficiency Operation of Terahertz Quantum Cascade lasers at 3.3 THz
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