Prof. Xiaojun Xu Profile

Prof. Xiaojun Xu

Professor at National Univ of Defense Technology

SPIE Involvement:

Author

Publications (72)

Proceedings Article | 10 April 2023 Paper

Theoretical and experimental research on output characteristics of oscillating-amplifying integrated fiber laser

Lingfa Zeng, Chen Shi, Hairong Zhong, Peng Wang, Baolai Yang, Xiaoming Xi, Hanwei Zhang, Xiaolin Wang, Xiaojun Xu

Proceedings Volume 12614, 126140T (2023) https://doi.org/10.1117/12.2672834

KEYWORDS: Fiber lasers, Oscillators, Boundary conditions, Pulsed laser operation, Logic, Laser stabilization

Read Abstract +

Proceedings Article | 28 December 2022 Presentation + Paper

1 kW low-SWaP fiber laser based on the technology of phase-change cool storage

Yanxing Ma, Jian Wu, Baolai Yang, Feng He, Pu Zhou, Lei Si, Xiaojun Xu

Proceedings Volume 12310, 123100Q (2022) https://doi.org/10.1117/12.2646111

KEYWORDS: Fiber lasers, Heatsinks, Copper, High power fiber lasers, Foam, Liquids, Cooling equipment, Metals, Laser applications, 3D modeling

Read Abstract +

SPIE Journal Paper | 4 May 2022 Open Access

Design of a four-energy-level vertical external surface-emission laser enabled on the waveguide grating structure

Wenda Cui, Hanchang Huang, Hongyan Wang, Kai Han, Xiaojun Xu

JNP, Vol. 16, Issue 02, 026003, (May 2022) https://doi.org/10.1117/12.10.1117/1.JNP.16.026003

KEYWORDS: Absorption, Waveguides, Ions, Neodymium, Nanostructures, Laser development, Refractive index, Optical design, Reflectors, Fiber lasers

Read Abstract +

DOWNLOAD PAPER

Proceedings Article | 27 March 2022 Paper

Theoretical study on stimulated Raman scattering and mode evolution characteristics in spindle-shaped Ytterbium-doped fiber laser

Lingfa Zeng, Chen Shi, Xiaoming Xi, Hanwei Zhang, Peng Wang, Baolai Yang, Xiaolin Wang, Xiaojun Xu

Proceedings Volume 12169, 121698X (2022) https://doi.org/10.1117/12.2625190

KEYWORDS: Fiber lasers, Optical simulations, Raman spectroscopy, Raman scattering, Structured optical fibers, Signal processing, Oscillators, Analytical research, Absorption, Spindles

Read Abstract +

SPIE Journal Paper | 4 December 2020 Open Access

Irradiation of successive pulsed and continuous-wave lasers on a transparent polyethylene film

Changqing Song, Kai Han, Xiao Li, Wenda Cui, Xiaojun Xu

OE, Vol. 59, Issue 12, 125103, (December 2020) https://doi.org/10.1117/12.10.1117/1.OE.59.12.125103

KEYWORDS: Pulsed laser operation, Continuous wave operation, Plasma, High speed cameras, Transmittance, Laser sources, Laser induced damage, Laser energy, Optical engineering, Laser damage threshold

Read Abstract +

DOWNLOAD PAPER

Proceedings Article | 10 October 2020 Presentation + Paper

Raman mitigation in high-power fiber laser transmission by long period fiber grating for longer delivery distance

Qihao Hu, Xin Tian, Meng Wang, Zefeng Wang, Xiaojun Xu

Proceedings Volume 11544, 1154406 (2020) https://doi.org/10.1117/12.2573874

KEYWORDS: Oscillators, Raman scattering, Fiber lasers, Cladding, Carbon dioxide lasers

Read Abstract +

Proceedings Article | 17 May 2019 Paper

Detection of optical vortex using the fractional Fourier system

Wei Yan, Xiaojun Xu

Proceedings Volume 11170, 111700T (2019) https://doi.org/10.1117/12.2532527

KEYWORDS: Spiral phase plates, Optical vortices, Signal to noise ratio, Phase measurement, Fourier transforms, Charge-coupled devices, Interference (communication), Numerical simulations, Reliability, Optical tweezers

Read Abstract +

Proceedings Article | 17 May 2019 Paper

Experimental study of the transverse mode instability in different core diameter fiber laser oscillators

Yun Ye, Xiaoming Xi, Xiaolin Wang, Baolai Yang, Chen Shi, Hanwei Zhang, Pu Zhou, Xiaojun Xu

Proceedings Volume 11170, 111703Q (2019) https://doi.org/10.1117/12.2533997

KEYWORDS: Fiber lasers, Oscillators, Fiber Bragg gratings, Raman scattering, Laser applications, Fusion splicing

Read Abstract +

Proceedings Article | 29 March 2019 Paper

Modal decomposition for optical fibers based on the Wigner representation of modal field

Wei Yan, Xiaojun Xu, Taijiao Du, Zhihua Chen, Qi Guan

Proceedings Volume 11046, 110462O (2019) https://doi.org/10.1117/12.2522243

KEYWORDS: Optical fibers, Reliability, Numerical simulations, Wigner distribution functions, Superposition, Fiber lasers, Fiber coupled lasers, Fiber couplers, Wave propagation, Waveguides

Read Abstract +

Proceedings Article | 29 March 2019 Paper

Conical ring beam achieved via degenerated optical parametric generation in tightly focused quasi-phase matching conditions

Wei Zhao, Chuan Guo, Lingwei Zhao, Lei Liu, Hongyan Wang, Xiaojun Xu

Proceedings Volume 11046, 110460D (2019) https://doi.org/10.1117/12.2524397

KEYWORDS: Crystals, Nonlinear crystals, Laser crystals, Defense technologies, Optical tweezers, Nonlinear dynamics, Polarization, Optical filters, Beam shaping, Lithium niobate

Read Abstract +

Proceedings Article | 29 March 2019 Paper

Study on stimulated Raman scattering in fiber amplifier employing tapered Yb3+ doped fiber

Lingfa Zeng, Chen Shi, Xiaoming Xi, Hanwei Zhang, Xiaolin Wang, Xiaojun Xu

Proceedings Volume 11046, 110462B (2019) https://doi.org/10.1117/12.2524428

KEYWORDS: Fiber amplifiers, Raman spectroscopy, Optical simulations, Structured optical fibers, Fiber lasers, Absorption, Raman scattering, Cladding, Doping, Laser applications

Read Abstract +

Proceedings Article | 5 November 2018 Paper

Experimental study of mode instability in high power all-fiber amplifier under different pumping power distribution

Xuexue Luo, Rumao Tao, Xiaoming Xi, Chen Shi, Hanwei Zhang, Xiaolin Wang, Pu Zhou, Xiaojun Xu

Proceedings Volume 10811, 1081109 (2018) https://doi.org/10.1117/12.2502701

KEYWORDS: Amplifiers, Cladding, Raman scattering, Fiber amplifiers, Raman spectroscopy, Fiber lasers, Optical amplifiers

Read Abstract +

Proceedings Article | 5 November 2018 Paper

Suppression of stimulated Raman scattering in a monolithic fiber laser oscillator using chirped and tilted fiber Bragg gratings

Meng Wang, Qihao Hu, Le Liu, Zefeng Wang, Xiaojun Xu

Proceedings Volume 10811, 108110V (2018) https://doi.org/10.1117/12.2500861

KEYWORDS: Oscillators, Fiber lasers, Fiber Bragg gratings, Raman scattering, Optical filters, Manufacturing

Read Abstract +

Proceedings Article | 5 November 2018 Paper

Mitigating stimulated brillouin scattering in fiber using tilted fiber Bragg grating

Meng Wang, Le Liu, Qihao Hu, Zefeng Wang, Xiaojun Xu

Proceedings Volume 10811, 108110C (2018) https://doi.org/10.1117/12.2500866

KEYWORDS: Scattering, Fiber Bragg gratings, Optical amplifiers, Fiber lasers, Optical filters, High power fiber amplifiers, Optical fibers

Read Abstract +

Proceedings Article | 26 October 2017 Presentation

Numerical study of the measurement capability of quadriwave lateral shearing interferometry for multimode fiber laser (Conference Presentation)

Kun Xie, Wenguang Liu, Qiong Zhou, Hongmiao Zhao, Xiaojun Xu

Proceedings Volume 10436, 104360A (2017) https://doi.org/10.1117/12.2277995

KEYWORDS: Wavefronts, Interferometry, Fiber lasers, Phase measurement, Multimode fibers, Laser interferometry, Optical simulations

Read Abstract +

Proceedings Article | 25 October 2017 Paper

Real time distributed temperature measurement of the gain fiber in all-fiber laser employing OFDR technology

Zichao Zhou, Xiaolin Wang, Long Huang, Pengfei Ma, Kai Han, Xiaojun Xu

Proceedings Volume 10464, 1046419 (2017) https://doi.org/10.1117/12.2285150

KEYWORDS: Fiber lasers, Temperature metrology, Fiber Bragg gratings, Laser systems engineering, High power fiber lasers, Rayleigh scattering

Read Abstract +

Proceedings Article | 24 October 2017 Paper

A fiber-laser-pumped four-wavelength continuous-wave mid-infrared optical parametric oscillator

Peng Wang, Yaping Shang, Xiao Li, Xiaojun Xu

Proceedings Volume 10457, 104570S (2017) https://doi.org/10.1117/12.2283212

Read Abstract +

Proceedings Article | 24 October 2017 Paper

Monolithic wavelength-tunable thulium-doped fiber laser mode-locked by semiconductor saturable absorber mirror with 120nm tuning range

Zhuo Xu, Zhihong Li, Zhiyuan Dou, Jing Hou, Xiaojun Xu

Proceedings Volume 10457, 1045736 (2017) https://doi.org/10.1117/12.2285549

KEYWORDS: Fiber lasers, Mode locking, Wavelength tuning

Read Abstract +

Proceedings Article | 24 October 2017 Paper

Ultra-long duration and ultra-high duty cycle dissipative soliton resonance in a mode-locked thulium-doped fiber laser

Zhuo Xu, Zhiyuan Dou, Zhihong Li, Jing Hou, Xiaojun Xu

Proceedings Volume 10457, 1045737 (2017) https://doi.org/10.1117/12.2285552

KEYWORDS: Fiber lasers, Solitons, Mode locking

Read Abstract +

Proceedings Article | 24 October 2017 Paper

A method of plenoptic imaging with high resolution in turbulent atmosphere

Yang Lv, Haotong Ma, Xuanzhe Zhang, Yu Ning, Xiaojun Xu

Proceedings Volume 10462, 104624M (2017) https://doi.org/10.1117/12.2285566

KEYWORDS: Image resolution, Imaging systems, Phase retrieval, Image processing, Image restoration

Read Abstract +

Proceedings Article | 5 October 2017 Paper

Experimental investigation of the photodarkening induced core laser leakage in a 3kW co-pumping fiber amplifier

Lingchao Kong, Miao Li, Jinyong Leng, Xiaolin Wang, Pu Zhou, Xiaojun Xu, Jinbao Chen, Zongfu Jiang

Proceedings Volume 10436, 104360N (2017) https://doi.org/10.1117/12.2277498

KEYWORDS: Fiber amplifiers, Fiber lasers, Laser applications, High power fiber lasers, Thermal effects

Read Abstract +

Proceedings Article | 12 May 2017 Paper

The thermal damage process of the contaminated optical element used in high energy laser system

Kai Han, Rui Song, Xiaojun Xu

Proceedings Volume 10173, 101730G (2017) https://doi.org/10.1117/12.2267510

KEYWORDS: Coating, Continuous wave operation, Mirrors, Etching, Optical testing, Reflectivity, Optical components, Laser energy, Laser induced damage, Laser systems engineering

Read Abstract +

Proceedings Article | 12 May 2017 Paper

Spatial light modulators based laser guide star simulator

Ruiyao Luo, Wenda Cui, Hongyan Wang, Wuming Wu, Quan Sun, Yu Ning, Xiaojun Xu

Proceedings Volume 10173, 101731C (2017) https://doi.org/10.1117/12.2267932

KEYWORDS: Spatial light modulators, Atmospheric turbulence, Atmospheric modeling, Sodium, Adaptive optics, Device simulation, Troposphere, Atmospheric propagation, Laser guide stars, Optical simulations

Read Abstract +

Proceedings Article | 12 May 2017 Paper

Enhanced optical absorption in nanopatterned Yb-doped thin films for solid state laser application

Wenda Cui, Weihong Hua, Hongyan Wang, Han Kai, Xiaojun Xu

Proceedings Volume 10173, 101731L (2017) https://doi.org/10.1117/12.2268049

KEYWORDS: Reflectivity, Laser optics, Ions, Diffraction gratings, Laser applications, Resonance enhancement, Absorption, Nanostructures, Thin films, Solid state lasers

Read Abstract +

Proceedings Article | 12 May 2017 Paper

Modeling of diode pumped nanoparticle gas laser

Xu Yang, Hongyan Wang, Zining Yang, Xiaojun Xu

Proceedings Volume 10173, 101731F (2017) https://doi.org/10.1117/12.2268058

KEYWORDS: Diodes, Nanoparticles, Gas lasers, Ytterbium, Scattering, Laser scattering, Ions, Luminescence, Reflectivity, Solid state lasers

Read Abstract +

Proceedings Article | 13 January 2017 Paper

Mid-infrared optical parametric oscillator pumped by an amplified random fiber laser

Yaping Shang, Meili Shen, Peng Wang, Xiao Li, Xiaojun Xu

Proceedings Volume 10254, 1025408 (2017) https://doi.org/10.1117/12.2256494

KEYWORDS: Fiber lasers, Mid-IR, Optical parametric oscillators, Fiber amplifiers, Signal processing, Optical testing, Raman spectroscopy, Crystals, Continuous wave operation, Cladding

Read Abstract +

Proceedings Article | 13 January 2017 Paper

Investigation of hollow beam generated by double axicons and its propagation properties

Peng Wang, Xiao Li, Yaping Shang, Xiaojun Xu

Proceedings Volume 10254, 1025407 (2017) https://doi.org/10.1117/12.2256489

KEYWORDS: Axicons, Beam propagation method, Gaussian beams, Optical simulations, Optical tweezers, Mirrors, Diffraction, Telescopes, Near field, Particles

Read Abstract +

Proceedings Article | 13 January 2017 Paper

30 Watts mid-infrared optical parametric oscillator based on spectral beam combination technology

Yaping Shang, Peng Wang, Xiao Li, Xiaojun Xu

Proceedings Volume 10254, 1025410 (2017) https://doi.org/10.1117/12.2256491

KEYWORDS: Mid-IR, Optical parametric oscillators, Fiber lasers, Nonlinear crystals, Mirrors, Laser applications, Thermal effects, High power lasers, Laser induced damage, Continuous wave operation

Read Abstract +

Proceedings Article | 13 January 2017 Paper

Theoretical research of beam combination between hollow beam and Gaussian beam

Peng Wang, Xiao Li, Yaping Shang, Xiaojun Xu

Proceedings Volume 10254, 1025404 (2017) https://doi.org/10.1117/12.2256552

KEYWORDS: Gaussian beams, Axicons, Optical simulations, Beam shaping, Transform theory, MATLAB, Zemax, Near field, Particles, Computer generated holography

Read Abstract +

SPIE Journal Paper | 28 December 2016

Frequency downconversion of an amplified, full-open cavity random fiber laser

Yaping Shang, Peng Wang, Xiao Li, Xiaojun Xu

OE, Vol. 55, Issue 12, 126112, (December 2016) https://doi.org/10.1117/12.10.1117/1.OE.55.12.126112

KEYWORDS: Fiber lasers, Optical parametric oscillators, Fiber amplifiers, Oscillators, Laser applications, Crystals, Continuous wave operation, Raman spectroscopy, Nonlinear crystals, Laser stabilization

Read Abstract +

Proceedings Article | 9 November 2016 Paper

Vortex beam based more stable annular laser guide star

Ruiyao Luo, Wenda Cui, Lei Li, Quan Sun, Yulong He, Hongyan Wang, Yu Ning, Xiaojun Xu

Proceedings Volume 10016, 100161H (2016) https://doi.org/10.1117/12.2245665

KEYWORDS: Laser guide stars, Gaussian beams, Adaptive optics, Atmospheric turbulence, Atmospheric propagation, Optical simulations, Sodium, Telescopes, Atmospheric modeling, Numerical simulations

Read Abstract +

Proceedings Article | 9 November 2016 Paper

Experimental investigation of thermally induced core laser leakage in large mode area single trench fiber

Lingchao Kong, Liangjin Huang, Shaoyi Gu, Jinyong Leng, Shaofeng Guo, Pu Zhou, Xiaojun Xu, Zongfu Jiang

Proceedings Volume 10016, 100161M (2016) https://doi.org/10.1117/12.2246063

KEYWORDS: Fiber lasers, Thermal effects, Fiber amplifiers, Waveguides, Fermium, Frequency modulation, Cladding, Absorption, Semiconductor lasers, Refractive index

Read Abstract +

Proceedings Article | 9 November 2016 Paper

Thermal effects of the gradient doping gain fiber in all-fiber MOPA

Zichao Zhou, Xiaolin Wang, Zanran Xu, Kai Han, Xiaojun Xu

Proceedings Volume 10016, 100161P (2016) https://doi.org/10.1117/12.2246126

KEYWORDS: Doping, Thermal effects, Fiber lasers, High power fiber lasers, Fiber amplifiers, Ytterbium, Temperature metrology, Amplifiers, Cladding, Absorption

Read Abstract +

Proceedings Article | 19 October 2016 Paper

A novel criterion for evaluating the beam quality of high energy laser

Kai Han, Quan Sun, Xiaojun Xu

Proceedings Volume 10152, 101520B (2016) https://doi.org/10.1117/12.2244510

KEYWORDS: Laser energy, Wavefront aberrations, Wavefronts

Read Abstract +

Proceedings Article | 27 September 2016 Paper

Influence of the contaminant size on the thermal damage of optical mirrors used in high energy laser system

Kai Han, Rui Song, Xiaojun Xu, Zejin Liu

Proceedings Volume 9952, 99520M (2016) https://doi.org/10.1117/12.2236773

KEYWORDS: Mirrors, Laser energy, Thermography, Laser induced damage, Laser systems engineering, Continuous wave operation, Laser energy, Heat flux, Silica, Laser damage threshold, Laser applications

Read Abstract +

Proceedings Article | 27 July 2016 Paper

Vapor cell based sodium laser guide star mechanism study lab-bench

Hongyan Wang, Lihang Li, Ruiyao Luo, Lei Li, Yu Ning, Fengjie Xi, Xiaojun Xu

Proceedings Volume 9909, 99095O (2016) https://doi.org/10.1117/12.2232583

KEYWORDS: Modulators, Luminescence, Sodium, Laser guide stars, Adaptive optics, Polarization, Telescopes, Chemical species, Laser guide stars, Pulsed laser operation, Magnetism

Read Abstract +

SPIE Journal Paper | 9 May 2016

High power incoherent beam combining of fiber lasers based on a 7 × 1 all-fiber signal combiner

Xuanfeng Zhou, Zilun Chen, Zefeng Wang, Jing Hou, Xiaojun Xu

OE, Vol. 55, Issue 05, 056103, (May 2016) https://doi.org/10.1117/12.10.1117/1.OE.55.5.056103

KEYWORDS: Fiber lasers, Cladding, Capillaries, Quality measurement, Beam quality measurement, Structured optical fibers, Optical testing, Beam analyzers, Beam propagation method, Signal processing

Read Abstract +

Proceedings Article | 26 January 2016 Paper

Numerical analysis of wavefront measurement characteristics by using plenoptic camera

Yang Lv, Haotong Ma, Xuanzhe Zhang, Yu Ning, Xiaojun Xu

Proceedings Volume 9796, 97960M (2016) https://doi.org/10.1117/12.2230660

KEYWORDS: Numerical analysis, Wavefront sensors, Cameras, Sensors, Numerical simulations, Telescopes, Device simulation, Zernike polynomials, Atmospheric turbulence, Adaptive optics

Read Abstract +

Proceedings Article | 15 October 2015 Paper

Broadband mid-infrared wavelength conversion laser based on Cr2+ doped ceramic materials

Yaping Shang, Ke Yin, Xiao Li, Peng Wang, Xiaojun Xu

Proceedings Volume 9671, 96711Z (2015) https://doi.org/10.1117/12.2202956

KEYWORDS: Mid-IR, Ceramics, Laser sources, Zinc, Absorption, Chalcogenides, Transition metals, Laser applications, Laser development, High power lasers

Read Abstract +

Proceedings Article | 15 October 2015 Paper

Theoretical explanation of the polarization-converting system achieved by beam shaping and combination technique and its performance under high power conditions

Peng Wang, Xiao Li, YaPing Shang, XiaoJun Xu

Proceedings Volume 9671, 96711H (2015) https://doi.org/10.1117/12.2201130

KEYWORDS: Axicons, Gaussian beams, Fiber lasers, High power lasers, Mirrors, Beam shaping, Laser applications, Polarization, Optical simulations, Solids

Read Abstract +

Proceedings Article | 5 August 2015 Paper

Designation of a polarization-converting system and its enhancement of double-frequency efficiency

Peng Wang, Xiao Li, YaPing Shang, XiaoJun Xu

Proceedings Volume 9621, 96210V (2015) https://doi.org/10.1117/12.2193143

KEYWORDS: Axicons, Second-harmonic generation, Gaussian beams, Fiber lasers, Energy efficiency, Polarization, Mirrors, Laser applications, High power lasers, Control systems

Read Abstract +

Proceedings Article | 14 May 2015 Paper

Thermal distortion real-time detection and correction of a high-power laser beam-splitter mirror based on double Shack-Hartmann wavefront sensors

Yu Ning, Quan Sun, Hongyan Wang, Wuming Wu, Shaojun Du, Xiaojun Xu

Proceedings Volume 9513, 95130Y (2015) https://doi.org/10.1117/12.2176741

KEYWORDS: Adaptive optics, Wavefront sensors, Sensors, Distortion, Mirrors, Data fusion, High power lasers, Detection and tracking algorithms, Beam splitters, Wavefronts

Read Abstract +

Proceedings Article | 3 February 2015 Paper

DPAL research in Changsha

Hongyan Wang, Xiaojun Xu, Zining Yang, Weihong Hua

Proceedings Volume 9255, 92551X (2015) https://doi.org/10.1117/12.2066962

KEYWORDS: Semiconductor lasers, Rubidium, Diodes, Quantum efficiency, Absorption, Ionization, Luminescence, Gas lasers, Potassium, Solid state lighting

Read Abstract +

Proceedings Article | 3 February 2015 Paper

High power mid-infrared continuous-wave optical parametric oscillator pumped by fiber lasers

Xiaojun Xu, Xiao Li, Lei Liu, Yaping Shang

Proceedings Volume 9255, 925507 (2015) https://doi.org/10.1117/12.2066963

KEYWORDS: Optical parametric oscillators, Mid-IR, Fiber lasers, Continuous wave operation, Laser development, Polarization, Laser applications, Crystals, Remote sensing

Read Abstract +

Proceedings Article | 18 November 2014 Paper

Towards high-power random fiber laser

Hanwei Zhang, Pu Zhou, Haibin Lv, Hu Xiao, Xiaolin Wang, Xiaojun Xu

Proceedings Volume 9266, 92660I (2014) https://doi.org/10.1117/12.2074619

KEYWORDS: Fiber lasers, Raman spectroscopy, Random lasers, Fiber Bragg gratings, Laser damage threshold, Rayleigh scattering, Optical fibers, Raman scattering, Mirrors, Single mode fibers

Read Abstract +

Proceedings Article | 7 October 2014 Paper

DPAL research in Changsha

Hongyan Wang, Xiaojun Xu, Zining Yang, Weihong Hua

Proceedings Volume 9251, 92510T (2014) https://doi.org/10.1117/12.2066960

KEYWORDS: Semiconductor lasers, Rubidium, Diodes, Quantum efficiency, Absorption, Ionization, Luminescence, Gas lasers, Potassium, Solid state lighting

Read Abstract +

Proceedings Article | 7 October 2014 Paper

Study on high-power continuous-wave mid-infrared optical parametric oscillator

Xiao Li, Xiaojun Xu, Yaping Shang, Hongyan Wang, Lei Liu

Proceedings Volume 9251, 92510A (2014) https://doi.org/10.1117/12.2066961

KEYWORDS: Optical parametric oscillators, Mid-IR, Fiber lasers, Continuous wave operation, Laser applications, Laser development, Polarization, Crystals, Remote sensing

Read Abstract +

Proceedings Article | 7 August 2014 Paper

Experimental demonstration of brighter sodium resonant scattering with 1.7 GHz sideband repumping for long pulse laser

Lihang Li, Shaopeng Zhang, Weihong Hua, Hongyan Wang, Yu Ning, Xiaojun Xu

Proceedings Volume 9148, 91483T (2014) https://doi.org/10.1117/12.2056345

KEYWORDS: Sodium, Chemical species, Pulsed laser operation, Light scattering, Laser scattering, Scattering, Laser guide stars, Adaptive optics, Telescopes, Laser development

Read Abstract +

Proceedings Article | 1 May 2014 Paper

Study on wavefront pre-compensation of thermal deformation aberrations in the beam path by FEM and Zernike polynomials

Qiong Zhou, Wenguang Liu, Zongfu Jiang, Xiaojun Xu

Proceedings Volume 9131, 91311C (2014) https://doi.org/10.1117/12.2050245

KEYWORDS: Wavefronts, Mirrors, Finite element methods, Zernike polynomials, Absorption, Silicon, Reflectivity, Laser sources, Thermal effects, Monochromatic aberrations

Read Abstract +

Proceedings Article | 15 October 2013 Paper

Single-element beam shaper for conversion of a fiber laser beam into a near-diffraction-limited dark hollow beam

Haotong Ma, Haojun Hu, Wenke Xie, Guangwen Jiang, Xiaojun Xu

Proceedings Volume 8898, 88980S (2013) https://doi.org/10.1117/12.2029406

KEYWORDS: Beam shaping, Wavefronts, Aspheric lenses, Gaussian beams, Fiber lasers, Near field optics, Geometrical optics, Fourier optics, Optical alignment, Near field

Read Abstract +

Proceedings Article | 19 September 2013 Paper

Large viewing field wavefront sensing by using a lightfield system

Yang Lv, Xuanzhe Zhang, Haotong Ma, Yu Ning, Rui Wang, Xiaojun Xu

Proceedings Volume 8905, 89052T (2013) https://doi.org/10.1117/12.2035212

KEYWORDS: Wavefront sensors, Wavefronts, Telescopes, Numerical simulations, Reflectors, Staring arrays, CCD cameras, Imaging systems, Mirrors, Adaptive optics

Read Abstract +

Proceedings Article | 19 September 2013 Paper

Influence of geomagnetic field for continuous wave (CW) laser excited sodium guide stars backward fluorescence intensity

Shao-peng Zhang, Hong-yan Wang, Wei-hong Hua, Yu Ning, Xiao-jun Xu

Proceedings Volume 8905, 89051E (2013) https://doi.org/10.1117/12.2034146

KEYWORDS: Magnetism, Sodium, Laser guide stars, Sodium guide stars, Continuous wave operation, Luminescence, Adaptive optics, Chemical species, Telescopes, Polarization

Read Abstract +

Proceedings Article | 16 May 2013 Paper

An optical parameter oscillator for alkali vapor lasers high intensity pump experiment

Lihang Li, Wenyu Li, Hongyan Wang, Zining Yang, Xiaojun Xu

Proceedings Volume 8796, 879626 (2013) https://doi.org/10.1117/12.2011295

KEYWORDS: Rubidium, Luminescence, Optical parametric oscillators, Oscillators, Ferroelectric materials, Excimer lasers, Gas lasers, Crystals, Alkali vapor lasers, Second-harmonic generation

Read Abstract +

Proceedings Article | 16 May 2013 Paper

Calculation of transmittance of diode pumped alkali laser in atmosphere propagation

Yiqin Que, Weihong Hua, Hongyan Wang, Zining Yang, Xiaojun Xu

Proceedings Volume 8796, 87962L (2013) https://doi.org/10.1117/12.2011297

KEYWORDS: Unmanned aerial vehicles, Transmittance, Laser scattering, Atmospheric propagation, Solar energy, Carbon dioxide lasers, Absorption, Atmospheric particles, Solar cells, Laser energy

Read Abstract +

SPIE Journal Paper | 26 April 2013

Study on the generation of a vortex laser beam by using phase-only liquid crystal spatial light modulator

Haotong Ma, Haojun Hu, Wenke Xie, Xiaojun Xu

OE, Vol. 52, Issue 09, 091721, (April 2013) https://doi.org/10.1117/12.10.1117/1.OE.52.9.091721

KEYWORDS: Near field, Near field optics, Spiral phase plates, Liquid crystals, Gaussian beams, Error analysis, Optical engineering, Numerical simulations, Electrodes, Wavefronts

Read Abstract +

Proceedings Article | 30 January 2013 Paper

Volume Bragg Grating temperature gradient effect on laser diode array and stack spectra narrowing

Hongyan Wang, Zining Yang, Weihong Hua, Wenguang Liu, Xiaojun Xu

Proceedings Volume 8677, 86771F (2013) https://doi.org/10.1117/12.2010488

KEYWORDS: Glasses, Finite element methods, Semiconductor lasers, Convection, Diodes, Absorption, Fiber Bragg gratings, Thermography, Copper, Temperature metrology

Read Abstract +

Proceedings Article | 29 November 2012 Paper

Gas dynamic effect in high energy fluid diode pumped alkali vapor laser

Yao Xu, Wenyu Li, Hongyan Wang, Zining Yang, Xiaojun Xu

Proceedings Volume 8551, 855103 (2012) https://doi.org/10.1117/12.999275

KEYWORDS: 3D modeling, Fluid dynamics, Luminescence, Alkali vapor lasers, Diodes, Finite volume methods, Gas lasers, Lithium, Optoelectronics, Absorption

Read Abstract +

Proceedings Article | 29 November 2012 Paper

Theoretical and experimental investigation of Rb-Ar excimer pumped alkali laser characteristics

Desheng Yue, Wenyu Li, Hongyan Wang, Zining Yang, Xiaojun Xu

Proceedings Volume 8551, 855102 (2012) https://doi.org/10.1117/12.999601

KEYWORDS: Absorption, Rubidium, Chemical species, Excimers, Satellites, Semiconductor lasers, Argon, Excimer lasers, Pulsed laser operation, Optical parametric oscillators

Read Abstract +

Proceedings Article | 20 August 2011 Paper

Experimental study of SBS suppression with phase-modulation in all-fiber amplifier

Wenbo Du, Pu Zhou, Yanxing Ma, Xiaolin Wang, Jiajan Zhu, Xiaolin Dong, Xiaojun Xu, Bohong Shu

Proceedings Volume 8192, 81921C (2011) https://doi.org/10.1117/12.899872

KEYWORDS: Modulation, Optical amplifiers, Fiber amplifiers, Phase shift keying, Fiber lasers, Phase modulation, High power fiber amplifiers, Semiconductor lasers, Scattering, Actinium

Read Abstract +

Proceedings Article | 20 August 2011 Paper

Numerical simulation of the high-order Gaussian laser beam cleanup system based on optimization-translation adaptive optics

Haichuan Zhao, Xiaolin Wang, Pu Zhou, Sanhong Wang, Xiaojun Xu

Proceedings Volume 8192, 81922G (2011) https://doi.org/10.1117/12.900605

KEYWORDS: Adaptive optics, Numerical simulations, Stochastic processes, Laser systems engineering, Optical simulations, Gaussian beams, Control systems, Deformable mirrors, High power lasers, Photodetectors

Read Abstract +

Proceedings Article | 17 November 2010 Paper

Adaptive conversion of a wavefront-distortion beam to near-diffraction-limited flattop beam based on stochastic parallel gradient descent algorithm

Haotong Ma, Zhan Yu, Xiaolin Wang, Yanxing Ma, Pu Zhou, Xiaojun Xu, Zejin Liu

Proceedings Volume 7843, 78430P (2010) https://doi.org/10.1117/12.870653

KEYWORDS: Wavefronts, Beam shaping, Detection and tracking algorithms, Stochastic processes, Wavefront distortions, Near field, Zernike polynomials, Deformable mirrors, Turbulence, Wavefront compensation

Read Abstract +

Proceedings Article | 17 November 2010 Paper

Active and passive coherent beam combining of thulium-doped fiber lasers

Pu Zhou, Xiaolin Wang, Yanxing Ma, Haotong Ma, Kai Han, Xiaojun Xu, Zejin Liu

Proceedings Volume 7843, 784307 (2010) https://doi.org/10.1117/12.870646

KEYWORDS: Fiber lasers, Fiber Bragg gratings, Collimators, Modulators, Interferometry, Control systems, Beam splitters, Phase shift keying, Laser applications, Fiber couplers

Read Abstract +

Proceedings Article | 17 November 2010 Paper

Coherent beam combining of stimulated Brillion scattering based multiwavelength lasers

Xiaolin Wang, Pu Zhou, Hongwei Chen, Yanxing Ma, Haotong Ma, Xiaojun Xu, Yijun Zhao

Proceedings Volume 7843, 784308 (2010) https://doi.org/10.1117/12.870194

KEYWORDS: Laser scattering, Fiber lasers, Amplifiers, Scattering, Visibility, Single mode fibers, Mirrors, Laser applications, Mode locking, Stochastic processes

Read Abstract +

Proceedings Article | 22 February 2008 Paper

Analysis and experimental study of the temperature and stress distribution in the slab of a solid-state heat capacity laser

Jiankun Yang, Xuebin Wan, Xiaojun Xu, Qisheng Lu

Proceedings Volume 6622, 66221I (2008) https://doi.org/10.1117/12.790886

KEYWORDS: Solid state lasers, Solid state physics, Pulsed laser operation, CCD cameras, Temperature metrology, Solid state electronics, Thermal effects, Computer simulations, Helium neon lasers, Nd:YAG lasers

Read Abstract +

Proceedings Article | 6 February 2008 Paper

Optimum design of the phase control system of coherent beam combining of fiber amplifiers

Xiaomeng Zhao, Xiaojun Xu, Pu Zhou, Jing Hou, Jinbao Chen

Proceedings Volume 6823, 68231A (2008) https://doi.org/10.1117/12.757193

KEYWORDS: Control systems, Control systems design, Fiber amplifiers, Optical amplifiers, Optical fibers, Fiber lasers, Phase measurement, Negative feedback, Oscillators, High power fiber amplifiers

Read Abstract +

Proceedings Article | 6 February 2008 Paper

Coherent beam combination of fiber lasers based on the stochastic parallel gradient descent algorithm

Xuejun Long, Yonghui Liang, Xiaojun Xu, Sanhong Wang, Qifeng Yu

Proceedings Volume 6823, 682319 (2008) https://doi.org/10.1117/12.757032

KEYWORDS: Fiber lasers, Numerical simulations, Coherent beam combination, Stochastic processes, Laser systems engineering, Optimization (mathematics), Algorithm development, Charge-coupled devices, Laser development, High power fiber lasers

Read Abstract +

Proceedings Article | 6 February 2008 Paper

Modeling self-organized coherent fiber laser array

Pu Zhou, Zilun Chen, Xiaojun Xu, Jing Hou, Zejin Liu

Proceedings Volume 6823, 68230G (2008) https://doi.org/10.1117/12.755751

KEYWORDS: Fiber lasers, Mode locking, Fiber Bragg gratings, Mathematical modeling, Charge-coupled devices, Fiber couplers, Numerical analysis, Laser stabilization, Array processing, Thermal effects

Read Abstract +

Proceedings Article | 26 January 2005 Paper

The effect of the thermal lens in optically pumped laser rods operated in heat capacity mode

Yi Yang, XiaoJun Xu, Baihong Shu

Proceedings Volume 5627, (2005) https://doi.org/10.1117/12.570321

KEYWORDS: Thermal effects, Rod lasers, Refractive index, Optical pumping, Solid state lasers, Laser development, Birefringence, Pulsed laser operation, Computer programming, Laser crystals

Read Abstract +

Proceedings Article | 29 April 2003 Paper

Measurement of a rectangular heated air flow by Hartmann sensor

Wenyu Li, Zongfu Jiang, Xiaojun Xu, Hua Huang, Wenke Xie

Proceedings Volume 5058, (2003) https://doi.org/10.1117/12.509863

Read Abstract +

Proceedings Article | 16 September 2002 Paper

Optical phase retrieval by lateral shear interferometer based on wavelet transform

Xiaojun Xu, Qisheng Lu, Zejin Liu

Proceedings Volume 4929, (2002) https://doi.org/10.1117/12.483266

KEYWORDS: Wavefronts, Discrete wavelet transforms, Phase retrieval, Interferometers, Wavelet transforms, Reconstruction algorithms, Wavefront reconstruction, Computer simulations, Numerical simulations, Signal processing

Read Abstract +

Proceedings Article | 5 September 2002 Paper

Reconstructing the original wavefront in lateral-shearing interferometry

Fang Ji, Xiaojun Xu, Bohong Shu

Proceedings Volume 4926, (2002) https://doi.org/10.1117/12.481681

KEYWORDS: Wavefronts, Fourier transforms, Interferometry, Fringe analysis, Mirrors, Interferometers, Imaging systems, Computing systems, Phase shifting, CCD cameras

Read Abstract +

Proceedings Article | 5 September 2002 Paper

Thermal blooming of HEL in the nonflowing beam tube

Sanhong Wang, Xiaojun Xu, Zhongfu Jiang

Proceedings Volume 4926, (2002) https://doi.org/10.1117/12.481689

KEYWORDS: Thermal blooming, Thermal modeling, Laser beam propagation, Acoustics, Helium, Absorption, Wave propagation, Refraction, Thermal effects, Mathematical modeling

Read Abstract +

Showing 5 of 72 publications

View contact details

UPDATE YOUR PROFILE

Is this your profile? Update it now.

Sign into your SPIE.org account

Don’t have a profile and want one?

Create an account on SPIE.org

Keywords/Phrases

Search In:

Publication Years