检索结果-南通市图书馆

Ultra-broad near-infrared emission of Bi-doped SiO_2 Al_2O_3 GeO_2 optical fibers

在线全文

学校读者我要写书评

暂无评论

Chinese Optics Letters 2011年第7期9卷 65-68页

作者：吴金东陈丹平吴兴坤邱建荣 State Key Laboratory of Modern Instruments Department of Optical Engineering Zhejiang University Zhejiang Futong Optical Fiber Technology Corp. Ltd. Shanghai Institute of Optics and Fine Mechanics Chinese Academy of Sciences State Key Laboratory of Silicon Materials Zhejiang University Optical Communication Materials Laboratory South China University of Technology

Bi-doped SiO2-Al2O3-GeO2 fiber preforms are prepared by modified chemical vapor deposition （MCVD） and solution doping process. The characteristic spectra of the preforms and fibers are experimentally investigated, and a distinct difference in emission between the two is observed. Under 808-nm excitation, an ultra-broad near-infrared （NIR） emission with full-width at half-maximum （FWHM） of 495 nm is observed in the Bi-doped fiber. This observation, to our knowledge, is the first in this field. The NIR emission consists of two bands, which may be ascribed to the Bi0 and Bi＋ species, respectively. This Bi-doDed fiber is promising for broadband or）tical amolification and widely tunable laser.

关键词： broadband amplifiers Chemical vapor deposition Fibers Germanium oxides Infrared devices Lasers Optical fibers Preforming Silicon compounds

175-W continuous-wave master oscillator power amplifier structure ytterbium-doped all-fiber laser

在线全文

学校读者我要写书评

暂无评论

Chinese Optics Letters 2008年第8期6卷 580-582页

作者：闫平殷树鹏巩马理 Center for Photonics and Electronics State Key Laboratory of TribologyDepartment of Precision InstrumentsTsinghua University

We report on hundred watts range ytterbium-doped all-fiber laser assembly based on the master oscillator power amplifier structure. It consisted of an oscillator and an amplifier with all-fiber components. And fiber fusion splice made the laser be an integrated fiber system. It generated up to 175.5 W of continuous- wave （CW） output power at 1085 nm with more than 75% extraction efficiency in the amplifier when the total coupled pump power into the double clad fiber was 270 W.

关键词： Architectural design broadband amplifiers Computer networks Extraction Lasers Power amplifiers Ytterbium

Generation of high-order harmonic continuum with two-hump-structure infrared laser pulse

在线全文

学校读者我要写书评

暂无评论

Chinese Optics Letters 2014年第3期12卷 1-4页

作者：刘灿东尉鹏飞苗境张春梅黄延穗郑颖辉冷雨欣曾志男 State Key Laboratory of High Field Laser Physics Shanghai Institute of Optics and Fine MechanicsChinese Academy of Sciences College of Physics and Electronic Information Engineering Wenzhou University

We experimentally investigate the high-order harmonic generation in argon gas cell driven by a multi-cycle broadband infrared laser pulse from a tunable optical-parametric-amplifier （OPA） source. The generation of high-order harmonic continuum with the cut-off photon energy up to 110 eV is observed by tuning the chirp of the 800-nm laser pulse which pumps OPA source. The generation of harmonic continuum is understood in terms of the two-hump structure of the OPA output spectrum and the optimal relative phase of the two humps. The demonstrated scheme is of importance for the generation of extreme ultraviolet （XUV） continuum at higher photon energy region.

关键词： broadband amplifiers Harmonic analysis Harmonic generation Infrared lasers Laser pulses

Compact and high-power broadband terahertz source based on femtosecond photonic crystal fiber amplifier

在线全文

学校读者我要写书评

暂无评论

Chinese Optics Letters 2011年第11期9卷 26-28页

作者：刘丰胡晓堃李江王昌雷李毅栗岩锋宋有建刘博文胡明列柴路邢岐荣王清月张伟力 Ultrafast Laser Laboratory Center for Terahertz WavesCollege of Precision Instrument and Opto-Electronics EngineeringKey Laboratory of Opto-Electronics Information Technology (Ministry of Education)Tianjin University School of Electrical and Computer Engineering Oklahoma State UniversityStillwater

We present a review of the development of a compact and high-power broadband terahertz （THz） source optically excited by a femtosecond photonic crystal fiber （PCF） amplifier.The large mode area of the PCF and the stretcher-free configuration make the pump source compact and very efficient.broadband THz pulses of 150 μW extending from 0.1 to 3.5 THz are generated from a 3-mm-thick GaP crystal through optical rectification of 12-W pump pulses with duration of 66 fs and a repetition rate of 52 MHz.A strong saturation effect is observed,which is attributed to pump pulse absorption;a Z-scan measurement shows that three-photon absorption dominates the nonlinear absorption when the crystal is pumped by femtosecond pulses at 1 040 nm.A further scale-up of the THz source power is expected to find important applications in THz nonlinear optics and nonlinear THz spectroscopy.

关键词： broadband amplifiers Crystal whiskers Electromagnetic pulse Fiber amplifiers Multiphoton processes Nonlinear optics Optical pumping Photonic crystals Pulse repetition rate Pumps Terahertz spectroscopy