A5075274037- Advanced Fiber Laser Technologies
- Solid State Laser Technologies
- Laser-Matter Interactions and Applications
- Photonic Crystal and Fiber Optics
- Advanced Fiber Optic Sensors
- Photonic and Optical Devices
- Photorefractive and Nonlinear Optics
- Laser Design and Applications
- Orbital Angular Momentum in Optics
- Diamond and Carbon-based Materials Research
- Laser Material Processing Techniques
- Semiconductor Lasers and Optical Devices
- Mechanical and Optical Resonators
- Ocular and Laser Science Research
- Advanced Optical Sensing Technologies
- Spectroscopy and Laser Applications
- Laser-induced spectroscopy and plasma
- Nonlinear Optical Materials Studies
- Quantum optics and atomic interactions
- Optical Network Technologies
- Optical Systems and Laser Technology
- Geophysics and Sensor Technology
- Optical Coherence Tomography Applications
- Plasmonic and Surface Plasmon Research
- Optical and Acousto-Optic Technologies
Hebei University of Technology
2019-2025
Advanced Laser Technology (United Kingdom)
2021-2025
Macquarie University
2017-2024
Tianjin University of Technology
2021-2023
Shanghai Institute of Optics and Fine Mechanics
2020
Chinese Academy of Sciences
2020
Harbin Institute of Technology
2015-2019
Beijing University of Technology
2012-2013
Delayed self-heterodyne interferometry is a commonly used technique for the measurement of laser linewidth. It typically requires use very long delay fiber when measuring narrow linewidth (especially linewidths in kHz-range) lasers. The fibers can result system losses and introduction 1/f noise that causes spectral line broadening. In this paper, we present calculation method processing output delayed setup using short length fiber, to determine makes pairs data points (corresponding...
Cascaded Brillouin lasers based on guided-wave structures are applied across a range of important fields such as optical communications, microwave photonics, and sensing. However, restricted by the volume available transmission gain medium, power output wavelength diversity devices somewhat limited. In this work, we report design development cascaded laser utilizing free-space layout with diamond crystal medium. A quasi-continuous-wave, 1 μm was used pump laser, Raman conversion is an...
We report on the design and operation of a laser, which outputs wavelengths in 1.2 1.5 μm ranges by leveraging two non-linear processes stimulated Raman scattering Brillouin diamond. By precisely controlling characteristics laser resonator formed around diamond crystal, we are able to selectively control onset each process so as tailor output both way wavelength power. This work demonstrates high degree flexibility power-handling capacity for conversion common (such 1064 nm used this work)...
Laser gain materials possessing high thermal conductivity and robust mechanical properties are key prerequisites for power lasers. We show that diamond, when configured as a Raman laser, enables access to these other extreme properties, providing an important new route brightness beam generation. Recent achievements in pulsed continuous wave oscillators, combining amplifiers, single longitudinal mode oscillators summarized, along with wavelength extension of concepts through adaption pumps,...
Brillouin lasers providing extremely narrow-linewidth are emerging as a powerful tool for microwave photonics, coherent communications, quantum processors, and spectroscopy. So far, laser performance applications have been investigated handful of select materials using guided-wave structures such micro-resonators, optical fibers, chip-based waveguides. Here, we report based on free-space action in an extreme material. Continuous-wave lasing 167 GHz from 532 nm pump is demonstrated diamond...
Laser guide stars based on the mesospheric sodium layer are becoming increasingly important for applications that require correction of atmospheric scintillation effects. Despite several laser approaches being investigated to date, there remains great interest in developing lasers with necessary power and spectral characteristics needed brighter single or multiple stars. Here we propose demonstrate a novel, best our knowledge, approach diamond Raman intracavity Type I second-harmonic...
Point clouds registration is an important step for laser scanner data processing, and there have been numerous methods. However, the existing methods often suffer from low accuracy speed when registering large point clouds. To meet this challenge, improved iterative closest (ICP) algorithm combining random sample consensus (RANSAC) algorithm, intrinsic shape signatures (ISS), 3D context (3DSC) proposed. The proposed method firstly uses voxel grid filter down-sampling. Next, feature points...
A narrow-linewidth laser with excellent temporal coherence is an important light source for microphysics, space detection, and high-precision measurement. An ultranarrow-linewidth output a linewidth as narrow subhertz has been generated theoretical length over millions of kilometers. Traditional grating spectrum measurement technology wide wavelength scanning range extended dynamic range, but the spectral resolution can only reach gigahertz level. The Fabry–Pérot interferometer megahertz...
Stimulated Brillouin scattering (SBS), with its advantages of low quantum defect and narrow gain bandwidth, has recently enabled an exciting path toward narrow-linewidth low-noise lasers. Whereas almost all work to date been in guided-wave configurations, adaptation unguided lasers (BLs) offers a greater capacity for power scaling, cascaded Stokes control, flexibility expanding wavelength range. Here, we report diamond laser (DBL) employing doubly resonant technology at 1064 nm. output 22.5...
Diamond crystals have garnered significant attention for applications in photonics, owing to their characteristics of ultra-high thermal conductivity, extremely broad spectral transmission range, and high Raman gain coefficient. These are particularly advantageous the development high-power, multi-wavelength lasers. In this work, we utilize single crystal diamond as a medium, intracavity wavelength-conversion emission from side-pumped, electro-optically Q-switched Nd:YAG module. Cascaded...
Abstract The excellent characteristics of transparent hard materials such as high hardness, transparency, corrosion resistance, and temperature resistance enable their applications in microfluidic substrates even harsh environments. Microchannels are important parts systems, the preparation microchannel structures deserves further in‐depth study. traditional processing method is contact with large thermal influence low efficiency, so it impossible to obtain complex microchannels quality...
High-order vortex beams carrying orbital angular momentum in the visible wavelength range are of tremendous interest for a diversity applications, including super-resolution imaging, microfabrication, and underwater communications. Such can be generated directly from compact solid-state lasers; however, they generally have low topological charge number. In this work, we demonstrate generation high-order Laguerre–Gaussian (LG) modes simple Pr:YLF laser cavity its application measurement...
We demonstrate a high-power laser system with high-quality near-field beam by using liquid-crystal spatial light modulator (SLM). An efficient shaping algorithm is discussed which can improve the output nearfield quality effectively. Both small-signal and large-signal amplification situation of are considered in algorithm. The experimental results show that near field fluence modulation improved from 1.99:1 to 1.26:1 SLM. Obvious uniform distribution improvement observed.
Single longitudinal mode (SLM) operation of a 620 nm diamond Raman laser is demonstrated in standing-wave cavity that includes second-harmonic generation element. Mode competition provided by the harmonic mixing shown to greatly increase stability, addition benefits spatial-hole-burning-free gain medium. Using multi-longitudinal 1064 Nd:YAG pump power 321 W and linewidth 3.3 GHz, SLM powers 38 at 11.8 1240 were obtained. The results indicate simple oscillators pumped multimode Yb or Nd pumps...
We report a diamond Raman laser that is continuously-tunable across the range from 590 nm to 625 producing continuous wave output with up 8 W. The system based on an all-fiber and tunable (1020–1072 nm) Yb-doped pump spectral linewidth of 25 GHz Raman-shifted frequency doubled in cavity containing lithium triborate second harmonic crystal. Despite broad spectrum, single obtained tuning 590–615 nm. results reveal practical approach obtain high-power single-frequency wavelength region not well...
The generation of optical vortex beams with user-configurable topological charge and spatial profile is a topic intense research due to the numerous potential applications for these types laser beams. In this work, we demonstrate direct controllable tunable from Pr3+:YLF cavity using spot-defect technique. A theoretical model established examine relationship between generated beam how relates parameters. Experimentally, selective operation first- second-order lattices one four singularities...