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Diode-pumped CW Tm:GdVO_4 laser at 1.9 μm

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Chinese Optics Letters 2006年第3期4卷 175-176页

作者：李玉峰姚宝权王月珠 Laboratory of Tunable Laser Technology Harbin Institute of Technology Harbin 150001

A high power cryogenic cooling Tin-doped （2%） GdVO4 laser double-end-pumped by fiber-coupled-diode： with the center wavelength of 804.5 nm at 21 ℃ is reported. The highest continuous-wave （CW） power of 2.35 W at 1903 nm is attained at pump power of 24 W. The slope efficiency is 12.5% and the tt, reshoht is 3.2 W. Single- and double-end-pumped types are investigated.

关键词： Cooling Couplings Cryogenics Diodes Efficiency Fibers Gadolinium High power lasers Pumping (laser) rare earth additions Thulium

113-W in-phase mode output from two ytterbium-doped large-core double-cladding fiber lasers

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Chinese Optics Letters 2007年第7期5卷 412-414页

作者：何兵楼祺洪周军郑颖辉薛冬董景星魏运荣张芳沛漆云凤朱健强李进延李诗愈王之江 Shanghai Institute of Optics and Fine Mechanics Chinese Academy of Sciences Shanghai 201800 Graduate School of the Chinese Academy of SciencesBeijing 100039 Shanghai Institute of Optics and Fine Mechanics Chinese Academy of Sciences Shanghai 201800 Department of Physics Zaozhuang University Zaozhuang 277160 Fiberhome Telecommunication Tech Co. Ltd. Wuhan 430073

Phase locking for two ytterbium-doped large-core fiber lasers has been demonstrated by using a selfimaging confocal resonator with a spatial filter. Steady high-contrast interference stripes are observed. The visibilities of coherent and incoherent stripes are 59% and 6%, respectively. The measured width of the central strip is in good agreement with the calculated result. For in-phase mode, the output power of the phase-locked fiber laser array is up to 113 W and corresponding slope efficiency is 38.5%.

关键词： Imaging techniques rare earth additions Ytterbium

Properties of steady-state in Er^(3+)-Yb^(3+)co-doped phosphate glass for optical waveguide laser

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Chinese Optics Letters 2007年第7期5卷 418-421页

作者：刘玉喜张晓霞李瑛庞莹 School of Optic-Electronic Information University of Electronic Science and Technology of China Chengdu 610054 School of Communication and Information Engineering University of Electronic Science and Technology of China Chengdu 610054

Transitions of laser diode （LD） pumped Er^3＋-yb^3＋ co-doped glass laser are rather complicated. Considering energy transfer between Er^3＋ and Yb^3＋ ions, cross-relaxation, upconversion luminescence, and other transition processes, rate equations of quasi-three energy-level-system of the Er^3＋-yb^3＋ co-doped laser are presented. The output characteristics are also calculated and analyzed in detail. The results show that Er^3＋-yb^3＋ co-doped phosphate waveguide lasers with high slope efficiency and low threshold can be achieved.

关键词： Electron energy levels Energy transfer Luminescence Optical glass Optical waveguides Phosphates rare earth additions Semiconductor lasers

Raman spectra of undoped and uranium doped CaF_2 single crystals

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Chinese Optics Letters 2005年第4期3卷 219-221页

作者：苏良碧徐军杨卫桥姜雄伟董永军 Shanghai Institute of Optics and Fine MechanicsChinese Academy of Sciences Shanghai 201800

Raman scattering experiments for nominally pure and uranium doped CaF2 single crystals were presented. In all crystals, the Raman active T2g vibration mode of CaF2 was observed, whose frequency shift and full-width at half-maximum (FWHM) broadening correspond well with defects and impurities in CaF2 lattice. Additional Raman peaks develop in nominally pure CaF2 with high etch pits density and U6+:CaF2 crystals. Part of additional Raman peaks in the experimental results, which are assumed due to vibration modes from F- interstitials and vacancies, are in well agreement with the theoretical predications by employing the Green-function formulation.

关键词： Calcium compounds Crystal defects Crystal growth Crystal impurities Crystal lattices Fluorine compounds Frequencies Green's function Optical microscopy Raman scattering Raman spectroscopy rare earth additions Uranium X ray analysis

Output characteristic of Yb^(3+)-doped fiber laser at different temperatures

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Chinese Optics Letters 2006年第3期4卷 173-174页

作者：陈吉欣隋展陈福深王建军 Key Laboratory of Optical Fiber School of Communication and Information EngineeringUniversity of Electronic Science and Technology of China Chengdu 610054 Research Center of Laser FusionChina Academy of Engineering Physics Mianyang 621900 Research Center of Laser Fusion China Academy of Engineering PhysicsMianyang 621900 Key Laboratory of Optical Fiber School of Communication and Information EngineeringUniversity of Electronic Science and Technology of ChinaChengdu 610054

The output characteristics of Yb^3＋-doped fiber laser at different temperatures are investigated. When temperature is increased from 13 to 95 ℃, the center wavelength of laser changes from 1084.9 to 1096.3 nm, the o... 详细信息

关键词： Efficiency rare earth additions Temperature Ytterbium

Effect of nanocrystals on up-conversion luminescence of Er^(3+),Yb^(3+) co-doped glass-ceramics

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Chinese Optics Letters 2005年第8期3卷 469-471页

作者：余华赵丽娟孟婕梁沁禹宣伊唐柏权许京军 Photonics Research Center College of Physical Science Nankai University

Different up-conversion luminescent spectra of Er^3＋ ions were observed in the oxyfluoride glass-ceramics. The ratio of two fluorides in the original compositions was modified in order to form different nanocrystals. The intensity of up-conversion luminescence increased sharply when the ratio of PbF2 and CdF2 was 40：10. The data of differential thermal analysis and X-ray diffraction were used to explain the optimization fluoride ratio. The intensity of up-conversion luminescence is not only decided by the crystallizability but also mainly related with the stoiehiometric proportion of fluoride nanocrystals in the glass-ceramics.

关键词： Differential thermal analysis Erbium Luminescence of inorganic solids Nanostructured materials Optical materials rare earth additions X ray diffraction analysis Ytterbium