基于新型Loyt滤波器选频的Nd∶GdVO4单频绿光微片激光器

报道了一种LD泵浦Nd∶GdVO4晶体的单频绿光微片激光器。采用Rochon棱镜与KTP倍频晶体构成的新型Loyt滤波器作为选频元件,各元件之间采用光胶的方法结合在一起,从而实现稳定的单纵模绿光输出。在600 mW,808 nm LD泵浦时获得95.3 mW稳定的单频绿光输出,光-光转换效率达15.9%。     

LD泵浦全固体单频YVO4／KTP绿光激光器研究

报道了一种用国产激光二极泵浦的全固体高效率单频Nd:YVO4／KTP绿光激光器的设计。结合采用短程吸收法与双折射滤光片技术两种选频方案,实现了Nd:YVO4／KTP结构绿光激光器的单频稳定输出。在泵浦功率为360mW时,单频稳定输出达38mW,光－光转换功率超过10％。     

基于PPLN晶体的单频绿光激光器的研究

随着激光技术的不断发展,单频激光器以其良好的单色性、高效率、窄带宽等优点广泛运用于激光测距、激光医疗、激光光谱学等领域。实现激光器单频输出的方法有很多种,采用的是短程吸收法;将PPLN晶体与Nd:YVO₄晶体之间间距缩短至1 mm,并做成绿光模组的形式,实现单纵模输出。当温度为28.5℃,LD泵浦抽运功率为0.8 W时,获得60 mW的单频绿光输出,光光转换率达7.1%,其线宽为120 MHz,实现了单频绿光激光器的又一突破。     

LD泵浦全固体单频YVO_4/KTP绿光激光器研究

报道了一种用国产激光二极管泵浦的全固体高效率单频 Nd∶ YVO4/KTP绿光激光器的设计。结合采用短程吸收法与双折射滤光片技术两种选频方案 ,实现了 Nd∶ YVO4/KTP结构绿光激光器的单频稳定输出。在泵浦功率为 3 6 0 m W时 ,单频稳定输出达 3 8m W,光 -光转换效率超过 1 0 %。     

单频蓝光激光器的实现

在多纵模工作状态下,腔内倍频激光器往往存在很大的倍频光输出功率噪声,影响了其应用。文中用激光二极管(LD)泵浦Nd∶YAG晶体,采用三镜V形腔结构及扭摆腔技术,有效地解决了蓝光噪声问题。利用LBO内腔倍频技术,实现了稳定的单频蓝激光输出。在3.5 W的泵浦功率下,最大单频蓝光输出为105 mW,光-光转化效率为3.5%。实验结果表明,采用扭摆腔技术是实现473 nm蓝光单频高效运转的有效方案,可以有效地解决蓝光噪声问题。     

全固态被动调Q单频绿光激光器的研究

报道了一种LD近贴泵浦、KTp晶体腔内倍频的NdYVO4/CrYAG/KTP结构高重复频率被动调Q绿光激光器.当腔内加入布氏片时,获得了单频运转.在注入泵浦功率为800mW时,得到平均功率43 mW、脉冲宽度26.4 ns、重复频率39.3 kHz、峰值功率41.4 W的被动调Q单频脉冲绿激光输出.     

可调谐全固化折叠腔单频倍频Nd:YVO4激光器

采用三镜折叠腔,使用KTP晶体进行内腔倍频,在激光谐振腔内插入标准具,利用标准具的选模调谐特性和激光晶体自身的标准具作用,设计并研制了LD抽运连续内腔倍频可调谐Nd:YVO4全固化激光器,实现了稳定的单频绿光输出,抽运功率1.5W时最大单频绿光输出40mW,频率可调谐范围约200GHz.     

LD抽运的Nd:YAG单频倍频激光器

在20mm激光腔内,Nd:YAG一端切成布氏角,与倍频晶体KTP组合构成双折射滤波片选择单纵模.用国产激光二极管(LD)纵向抽运,在会聚抽运光功率为500mW时,获得4mW单频连续运转的532nm绿光输出,同时获得约50mW的单频连续1064nm红外输出.     

可调谐全固化折叠腔单频倍频Nd∶YVO_4激光器

采用三镜折叠腔 ,使用KTP晶体进行内腔倍频 ,在激光谐振腔内插入标准具 ,利用标准具的选模调谐特性和激光晶体自身的标准具作用 ,设计并研制了LD抽运连续内腔倍频可调谐Nd∶YVO4 全固化激光器 ,实现了稳定的单频绿光输出 ,抽运功率 1 5W时最大单频绿光输出 40mW ,频率可调谐范围约 2 0 0GHz。     

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。     

345-mW 1836-nm single-frequency DFB fiber laser MOPA

We demonstrate an in-band-pumped continuous-wave single-frequency distributed-feedback (DFB) fiber laser emitting at a wavelength of 1836 nm with an output power of /spl sim/5 mW. The laser is subsequently amplified to 345 mW using a master-oscillator power amplifier configuration. To the best of the authors' knowledge, this is the first report of a Tm-co-doped single-frequency DFB fiber laser that is in-band pumped at 1565 nm. The laser is confirmed to operate in a single mode, using a scanning Fabry-Pe/spl acute/rot interferometer.     

准相位匹配的KTP晶体获得高效外腔谐振倍频绿光

采用准相位匹配的KTP晶体对全固化Nd∶YVO4连续输出的 10 6 4nm单频激光进行外腔谐振倍频 ,当倍频腔的红外输入功率为 15 0mW时 ,获得 76mW的单频绿光输出 ,最大倍频转换效率为 5 0 6 %。     

A new LD-pumped single frequency micro-chip green laser

A novel LD-pumped single-frequency micro-chip green laser is presented. By using the combination of short cavity and Loyt filter formed by Rochon prism and KTP crystal, a stable single t~equency green laser is obtained with 60 mW output at 500 mW LD-pump. The optical-to-optical conversion efficiency is about 12%. The optical contact between components of the laser is adopted. This laser has the advantages of a compact structure and a low cost.     

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全光纤单频脉冲光纤激光器

设计并实现了一种基于人眼安全波段的1550 nm全光纤化结构单频脉冲光纤激光器。激光器采用外腔稳频技术的单频半导体激光器作为种子源,其线宽1.8 kHz,功率20 mW。通过预放大器和声光调制器获得单频脉冲激光,并运用两级光纤放大器实现了线宽1.9 kHz、平均功率521 mW、脉冲宽度200 ns、重复频率10 kHz的单频脉冲光纤激光输出。输出脉冲峰值功率达260 W。输出端采用了双包层单模光纤,保证了输出激光的光束质量。整个激光器通过对种子光级联放大,结合放大器的增益控制,成功抑制了受激布里渊散射(Stimulated Brillouin Scattering,SBS)效应,消除了放大过程中噪声对线宽的影响,获得了线宽稳定的单频脉冲激光。     

可调谐单频掺镱光纤DBR激光器

对分布布拉格反射(DBR)的透射特性进行了分析,制作了一个单频窄线宽掺镱光纤DBR激光器.在977 nm半导体激光器泵浦下,在1052.5 nm波长处输出功率可达4 mW,线宽小于8 MHz(受测量仪器分辨率限制).采用弧形梁调谐光纤光栅,实现了DBR光纤激光器在单纵模工作状态下的连续调谐,调谐范围可达20.4 nm(1036.1～1056.5 nm),并研究了调谐对激光器的泵浦阈值和斜率效率的影响.     

High efficient and narrow linewidth fiber laser based on fiber grating Fabry-Perot cavity

A high Er3+-doped narrow linewidth fiber laser based on fiber Bragg grating Fabry-Perot cavity was demonstrated. The spatial hole burning effect was restrained by a fiber Faraday rotator. Two short fiber Bragg grating Fabry-Perot cavities as narrow bandwidth filters discriminated and selected laser longitudinal modes efficiently. A stable single-frequency 1534.83 nm laser was acquired. Pumped by two 976 nm laser diodes and two-ended output, the fiber laser exhibited a 12 mW threshold. Total 39.5 mW output power and one end 22 mW output power were obtained at the maximum 145 mW pump power. Optical-optical efficiency was 27% and slope efficiency was 29.7%. The output power seemed to be saturated when pump power increased. The 3 dB linewidth of the laser was less than 7.5 kHz, measured by the delayed self-heterodyne method with 15 km monomode fiber. The high power narrow linewidth fiber laser can be used in high resolution fiber sensor systems.     

Single-frequency fiber laser from linear cavity with loop mirror filter and dual-cascaded FBGs

A single-frequency ytterbium fiber laser was demonstrated by introducing a loop mirror filter, a polarization controller (PC), and dual-cascaded fiber Bragg gratings (FBGs) in linear laser cavity. The loop mirror with unpumped ytterbium fiber as a narrow bandwidth filter discriminated and selected laser longitudinal modes efficiently. The spatial hole burning effect was restrained by adjusting PC appropriately. Dual closely cascaded FBGs as the output coupler, acting as an etalon, expanded the operation range of single frequency. Output power up to 18 mW at 1064 nm were obtained under the launched pump power of 107 mW at 976 nm, the optical-optical conversion efficiency was about 16.8%; the slope efficiency was about 20%.