A5069472462- Particle Accelerators and Free-Electron Lasers
- Gyrotron and Vacuum Electronics Research
- Advanced X-ray Imaging Techniques
- High-Energy Particle Collisions Research
- Particle physics theoretical and experimental studies
- Quantum Chromodynamics and Particle Interactions
- Terahertz technology and applications
- Photonic and Optical Devices
- Optical Coatings and Gratings
- Particle accelerators and beam dynamics
- Photonic Crystals and Applications
- Nuclear physics research studies
- X-ray Spectroscopy and Fluorescence Analysis
- Spectroscopy and Laser Applications
- Laser Design and Applications
- Particle Detector Development and Performance
- Laser-Plasma Interactions and Diagnostics
National Synchrotron Radiation Laboratory
2016-2023
University of Science and Technology of China
2009-2023
University of Southampton
2017-2018
Brookhaven National Laboratory
2011
In this Letter, we report suspended silicon waveguides operating at a wavelength of 7.67 μm with propagation loss 3.1 0.3 dB∕cm.To our knowledge, is the first demonstration low-loss such long wavelength, comparable to other platforms that use more exotic materials.The Si waveguide core supported by sub-wavelength grating provides lateral optical confinement while also allowing access buried oxide layer so it can be wet etched using hydrofluoric acid.We demonstrate bends and s-bends.
Undulator tapering based on a prebunched electron beam and strong seed laser has been demonstrated as promising method to greatly enhance free-electron (FEL) efficiency suppress sideband instability. Different from the former works that introduce an ideal bunching or self-seeding mechanism, in this paper, we propose FEL by optimizing strategy with echo-enabled harmonic generation (EEHG). The simulation results demonstrate enhancement can be effectively maintained quite long undulator, which...
Polarization switching of synchrotron radiation has wide application prospects in various areas, requiring a high frequency between horizontally linear polarization (HLP) and vertically (VLP) or left-hand circular (LCP) right-hand (RCP). To make it possible for realizing fast switching, this paper we simplify incorporate the previous schemes based on segmentally helical undulators connected by phase shifters. Adjacent are set same opposite state to generate circularly linearly polarized...
Abstract FELiChEM is an infrared free electron laser user facility built at the University of Science and Technology China (USTC). It consists two oscillators which produce mid-infrared far-infrared lasers covering spectral range 2–200 μm current stage. In this paper, we propose a new operation mode megawatt (MW) terahertz (THz) superradiance (FEL) for FELiChEM. Start-to-end (S2E) simulations have been carried out, in three-dimension particle-in-cell (PIC) code PUFFIN used generation THz...
Abstract The generation of intense coherent radiation pulses in the far-infrared and terahertz regimes is considerable interest to free-electron laser (FEL) user community. At long wavelengths, diffraction effect can be quite severe, therefore, an optical waveguide required confine field. However, it will also bring about some new phenomena, most noteworthy one spectral gap phenomenon: at particular regardless electron beam adjustments, coupling efficiency output power FEL oscillators drop...
In this paper we report suspended silicon waveguides operating at a wavelength of 7.67 mm with propagation loss 3.1 ? 0.3 dB/cm. To our knowledge is the first demonstration low such long wavelength, comparable to other platforms that use more exotic materials. The Si waveguide core supported by subwavelength grating provides lateral optical confinement, while also allowing access buried oxide layer so it can be wet etched using hydrofluoric acid. We demonstrate bends and s-bends.
At University of Science and Technology China, we have an Infrared (IR) free electron laser (FEL) oscillator experimental facility (FELiChEM) to generate radiations in the wavelength range 2.5-50 m 40-200 m. The output power is one most concerned parameters by users. Since beam distribution out-coupling hole resonator mirror can influence saturated optical mode, it would be important issue IR light source. It has been demonstrated that use a hollow could offer higher than Gaussian beam. Thus...