共查询到20条相似文献,搜索用时 15 毫秒
1.
全光纤型Er/Yb共掺光纤短腔激光器 总被引:5,自引:4,他引:5
报道了一种高输出功率、高斜率效率的短腔ErYb共掺杂光纤激光器。激光谐振腔由一段ErYb共掺杂单模光纤与一对布拉格反射波长相同的光纤布拉格光栅(FBG)组成。反射率为60%的光纤光栅用作光纤激光器谐振腔的输出,3dB带宽为016nm。反射率为99%的光纤光栅作为高宽带反射腔镜,同时作为抽运光输入端,3dB带宽102nm。以980nm激光二极管(LD)作抽运源进行实验。使用不同的抽运功率分别测量不同长度的ErYb共掺杂光纤,优化光纤激光器谐振腔得到的最佳长度仅为13cm。即选用13cmErYb共掺杂光纤作为增益介质来制作短腔ErYb光纤光栅激光器,最大输出功率可达11mW,输出功率稳定性<±001dB,抽运阈值功率为35mW,斜率效率为153%,测量其15522nm激光的输出光谱,25dB线宽为03nm,边模抑制比>60dB,波长稳定性为005nm。可用于密集波分复用(DWDM)系统。 相似文献
2.
Yujin Chen Yanfu Lin Xinghong Gong Zundu Luo Yidong Huang 《Quantum Electronics, IEEE Journal of》2007,43(10):950-956
An Er:Yb:GdAl3(BO3)4 crystal was grown and room-temperature polarized absorption, emission, and gain spectra were investigated. Fluorescence decay curves of Er3+ at 1530 nm and Yb3+ at 1040 nm in the crystal were measured. Efficient laser operation of Er:Yb:GdAl3(BO3)4 crystal at 1.5-1.6 mum was realized. Quasi-continuous-wave output powers of 1.8 W with slope efficiency of 19% and 0.78 W with slope efficiency of 14% were achieved in diode-pumped c-cut and c-cut and a-cut crystals, respectively. The output spectrum and polarization of Er:Yb:GdAl3(BO3)4 laser were also investigated. 相似文献
3.
The results of an investigation of photon avalanche upconversion pumping in Er3+:TiAlO3 are reported. Five pump wavelengths corresponding to transitions from the metastable 4I13/2 state to the 2H11/2 state generated upconversion laser emission at 549.8 nm. The dependence of the laser output power on pump power near laser threshold is discussed in terms of a four-level kinetics model and is shown to reflect the threshold power requirement for photon avalanche. The maximum output power at 7 K was 33 mW, giving an optical conversion efficiency of 3.5% and a conversion efficiency of 28% based on absorbed power. Pumping Er:YALO by cross relaxation energy transfer produced 166 mW of laser output with an optical conversion efficiency of 17% 相似文献
4.
Auge F. Druon F. Balembois F. Georges P. Brun A. Mougel F. Aka G. Vivien D. 《Quantum Electronics, IEEE Journal of》2000,36(5):598-606
We present a theoretical and experimental analysis of a diode-pumped Yb3+-doped Ca4GdO(BO3)3 (Yb:GdCOB) laser. A new model for a diode-pumped quasi-three-level laser is described. The effects of absorption saturation, temperature profile, and the beam quality M2 factor of the pump diode have been taken into account, for the first time to our knowledge. We have obtained a good agreement between experimental measurements and theoretical calculations with two different pump wavelengths, 902 and 976 nm. Our model has given good predictions of the laser performances for different crystal temperatures and different M2 factors of the pump beam. As much as 440 mW of output power (at 1082 nm) have been achieved for 640 mW of absorbed pump power at 976 nm, corresponding to one of the highest slope efficiencies (81%) ever obtained with Yb-doped lasers 相似文献
5.
Burns P. Dawes J.M. Dekker P. Piper J.A. Huaijin Zhang Jiyang Wang 《Photonics Technology Letters, IEEE》2002,14(12):1677-1679
We report efficient laser operation at 1.5-1.6 /spl mu/m in an Er,Yb:YCOB laser. The maximum output power of 110 mW was achieved in a hemispherical cavity with a slope efficiency of 20%. We also report 100 mW of output in a flat-flat cavity configuration, and the first report of operation of this type of laser crystal in a true microchip arrangement with >10-mW output. 相似文献
6.
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
7.
10 kHz-linewidth diode-pumped Er:Yb:glass laser 总被引:1,自引:0,他引:1
A single-mode Er:Yb:phosphate glass laser pumped at 980 nm by an InGaAs diode laser is reported. The laser emits over 15 mW output power with 6% slope efficiency. The measured linewidth is 10.6 kHz and the RIN power is less than 140 dB/Hz.<> 相似文献
8.
LIU Yang WANG Xiao-bing SUN Bin CHENG Yong WANG Li-jun 《半导体光子学与技术》2006,12(4):242-244
An all-fiber based Er^3+ :Yb^3+ co-doped double clad fiber laser operating at 1 550 nm is demonstrated. By using 9 m long Er^3+ : Yb^3+ co-doped fiber(EYDF) as the gain medium, and using a pair of fiber Bragg gratings as wavelength filters, the line-width of the output laser is as narrow as 0.2 nm and the output power is more than 6 mW. The fluorescent effect of the laser before its emission is also studied. And it is found that the Er^3+ : Yb^3+ co-doped double-clad fiber laser also exhibits a high gain for Yb^3+ transition near 1 080 nm. 相似文献
9.
Junhai Liu Mateos X. Huaijin Zhang Jing Li Jiyang Wang Petrov V. 《Quantum Electronics, IEEE Journal of》2007,43(5):385-390
High-power continuous-wave laser operation near 1 mum was demonstrated at room temperature with c-cut and a-cut Yb:YAl3(BO3)4 crystals end-pumped by a fiber-coupled diode laser. Using a 2-mm-thick c-cut crystal, 10.6 W of output power was generated with an optical-to-optical efficiency of 65% and a slope efficiency of 72%. The complex polarization state of the generated laser radiation was also studied. With a 2-mm-thick a-cut crystal, sigma-polarized laser oscillation was obtained, producing a maximum output power of 8.1 W; the optical-to-optical and slope efficiencies were 56% and 61%, respectively. Complete absorption and emission cross section spectra of the Yb:YAl3(BO3) 4 crystal were also derived, revealing very strong anisotropy of the spectroscopic properties 相似文献
10.
Schafer K. Baumann I. Sohler W. Suche H. Westenhofer S. 《Quantum Electronics, IEEE Journal of》1997,33(10):1636-1641
Design, fabrication, and properties of an acoustooptically tunable Ti:Er:LiNbO3 waveguide laser of up to 31-nm tuning range in the wavelength band 1530 nm<λ<1575 nm are discussed. The laser cavity is formed by an Au mirror and a dielectric mirror as output coupler, both vacuum-deposited on the polished waveguide endfaces. As tunable intracavity wavelength filter with zero frequency shift, two monolithically integrated single-stage acoustooptical TE-TM-mode converters are used together with two polarization splitters operated as TE- and TM-pass polarizers, respectively. The minimum threshold of about 54 mW (coupled) pump power is obtained at λ≈1561-nm emission wavelength for diode laser pumping at λp≈1480 nm. With about 110-mW coupled pump power, up to 320-μW output power is achieved; the emission linewidth is 0.3 nm 相似文献
11.
3 μm波段激光是高精度外科手术的理想光源,也可作为长波中红外光参量振荡器的有效泵浦源。LD直接泵浦Er3+掺杂晶体是获得2.7~3 μm波段中红外激光的有效技术途径,具有成本低、结构紧凑简单等优点。由于Er3+ 2.8 μm激光下能级阻塞问题,一般需要高浓度掺杂,但高浓度掺杂易引起强烈的光吸收,增强了激光晶体的热效应,从而阻碍了激光功率的提升。低声子能量的氟化钙晶体特有的萤石型结构使得三价稀土离子极易形成“团簇”,将低浓度Er3+掺杂到氟化钙晶体中即可获得高效率的中红外激光增益介质。笔者课题组使用温度梯度法成功生长了低浓度掺杂1.3at.%Er3+: CaF2激光晶体,利用LD直接泵浦获得了2.2 W的中红外激光输出,这是目前利用LD端面泵浦同类晶体中的最高中红外激光输出功率。同时,文中还对上转换泵浦方式下该晶体的2.8 μm激光特性进行了研究。实验结果表明,低浓度掺杂的1.3at.%Er3+: CaF2晶体是一类具有产业化前景的中红外激光材料,有望推动长波中红外激光器向着结构紧凑、成本低的方向发展。 相似文献
12.
近年来,相干探测激光雷达是测量远距离低空风切变的有效手段,1.6 μm波段固体激光器以其人眼安全、探测器件成熟等优势成为相干雷达主要光源。其增益介质Er:YAG晶体在1532 nm波段有较强的吸收峰,但吸收谱较窄,因此通过使用1 532 nm光纤激光器进行谐振泵浦可以有效提高晶体输出效率。为此,文中以Er/Yb双包层光纤为增益介质,1532 nm光纤光栅为反射腔镜,976 nm半导体激光器为泵浦源,实现了全光纤化1532 nm激光输出。输出激光最大功率73.44 W,波长可调谐范围为1531.35~1532.14 nm,波长谱宽为0.06 nm,x 和y方向的光束质量M2分别为1.38和1.26,是1.6 μm固体激光器的理想泵浦源。并采用此激光器泵浦Er:YAG非平面环形腔获得1.3 W单频激光输出,斜率效率为31.76%。 相似文献
13.
Yb:BaCaBO3F(Yb:BCBF) has been investigated as a new laser crystal with potential for self-frequency doubling, Yb3+ in BCBF exhibits a maximum absorption cross section at 912 nm of 1.1×10-20 cm2 with a bandwidth (FWHM) of 19 nm. The maximum emission cross section at 1034 nm is 1.3×10-20 cm2 with a transition bandwidth of 24 nm. The measured emission lifetime of Yb3+ is 1.17 ms. An Yb:BCBF laser has been demonstrated with a Ti:sapphire pump source, and a measured slope efficiency of 38% has been obtained for the fundamental laser output. Single crystal powders of BCBF have been compared with KD +P for a relative measure of the second-harmonic generating potential, yielding deff(BCBF)~0.26 pm/V. The phasematching angle has been estimated from the refractive index data for type I second-harmonic generation of 0.517 μm light; the predicted angle is 37° from the c-axis. The growth, spectroscopy, laser performance, and linear and nonlinear optical properties of Yb:BCBF are reported 相似文献
14.
rials, CaTiO3:Yb3+/Er3+/Zn2+ nanocubes with uniform size were prepared by solvothermal method in this paper. They were respectively characterized by X-ray diffractometer (XRD), scanning electron microscope (SEM), photoluminescence (PL) spectroscopy and their fluorescence lifetimes. The results show that the average size of the nanocubes is about 550 nm×650 nm×850 nm with good upconversion luminescence (UCL) properties. Under 980 nm laser excitation, the effects of the ratio between activator Er3+ and sensitizer Yb3+ and Zn2+ doping on the upconversion fluorescence properties were investigated, and the optimal ion ratio was obtained. The results of steady-state spectra show that the strongest fluorescence intensity of CaTiO3:Yb3+/Er3+ was obtained with the addition of 10 mol% Zn2+ at a Yb3+/Er3+ molar doping ratio of 3:0.3, which was attributed to the crystal field asymmetry generated by the introduction of Zn2+ ions. The energy transfer and upconversion mechanism between Yb3+ and Er3+ ions in CaTiO3 nanocubes were investigated by analyzing the upconversion fluorescence kinetics. 相似文献
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16.
Upconversion lasing in Er:YAlO3 is reported. Laser emission was produced using both sequential two-step pumping and cross-relaxation energy transfer. In addition, photon avalanche upconversion pumping was demonstrated. Selection among these pumping mechanisms is determined by the pump wavelength, and laser operation was obtained with excitation between 785 nm and 840 nm. The highest laser output power was achieved at 34°K, where 918 mW of pump power at 807 nm produced 121 mW of TEM00 emission. The optical conversion efficiency was 13%. Repetitively Q-switched operation is reported, and the temporal- and temperature-dependence of the laser output is discussed 相似文献
17.
18.
Yinghong Xue Chingyue Wang Qingwen Liu Yanfeng Li Lu Chai Chengfeng Yan Guangjun Zhao Liangbi Su Xiaodong Xu Jun Xu 《Quantum Electronics, IEEE Journal of》2006,42(5):517-521
We report what is believed to be the first demonstration of the laser action of Yb/sup 3+/-doped Gd/sub 2/SiO/sub 5/ (Yb:GSO)crystal pumped by a 940-nm laser diode at room temperature. The threshold of laser generation is only 0.85 kW/cm/sup 2/, which is smaller than the theoretic threshold of Yb:YAG (1.54 kW/cm/sup 2/). The laser wavelength is 1090 nm. With a 2.5% output coupler, the maximum output power is 415 mW under a pump power of 5W. By using the SESAM, the Q-switched modelocking and CW mode-locked operations are demonstrated. 相似文献
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20.
为了研究ZnF2作为基质材料、稀土离子Yb3+和Er3+共掺摩尔分数不同时的发光性能,采用高温固相法,在820℃时制备稀土掺杂ZnF2样品,并对各个样品进行上转换发射光谱测试。将激发功率与上转换发射功率进行曲线拟合,确定Yb3+和Er3+光子吸收过程。结果表明,在980nm半导体激光器激发下,样品在可见光区域内存在533nm,555nm和655nm 3个上转换发射峰,发射的红光强度大于绿光强度,吸收光子数目依次为1.73,1.75,1.88,确定3个发射峰均对应于双光子吸收。此研究说明稀土离子掺杂ZnF2材料将在上转换红色荧光粉领域有重要的应用前景。 相似文献