A5101931916- Advanced Fiber Optic Sensors
- Advanced Fiber Laser Technologies
- Photonic and Optical Devices
- Photonic Crystal and Fiber Optics
- Optical Network Technologies
- Advanced Photonic Communication Systems
- Semiconductor Lasers and Optical Devices
- Astronomy and Astrophysical Research
- CCD and CMOS Imaging Sensors
- Superconducting Materials and Applications
- Magneto-Optical Properties and Applications
- Particle accelerators and beam dynamics
- Ubiquitin and proteasome pathways
- Cancer, Hypoxia, and Metabolism
- Particle Accelerators and Free-Electron Lasers
- Adaptive optics and wavefront sensing
- Caveolin-1 and cellular processes
- Infrared Target Detection Methodologies
- Optical Coatings and Gratings
Hubei University of Science and Technology
2024
Beijing Health Vocational College
2010-2018
Beijing Jiaotong University
2006-2010
An improved erbium-doped fiber laser configuration for achieving single-polarization, switchable dual-wavelength of orthogonal polarizations oscillations at room temperature is proposed. For the first time, two Bragg gratings (FBGs) directly written in a polarization-maintaining (PM) and photosensitive (PMPEDF) as wavelength-selective component are used linear cavity. Due to polarization hole burning (PHB) enhanced by FBG (PMFBG), can be designed operate stable or wavelength-switching modes...
A switchable multi-wavelength erbium-doped fiber ring laser based on a compact in-fiber Mach–Zehnder interferometer comb filter at room temperature is presented. The formed by splicing section of twin-core between two single mode fibers. By adjusting the states polarization controller appropriately, can be made to operate in stable single-, dual- and three-wavelength lasing states. operation principle spectral hole burning induced saturated effect burning.
A novel design of segmented cladding fiber (SCF) with resonant ring is proposed in this paper. high leakage loss ratio (>100) between the high-order modes (HOMs) and fundamental mode can be achieved at wavelength 1.064 μm. The HOMs suppression better than traditional SCF. numerical results show that effectively single-mode operation a area 790 μm <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sup> bend radius 15 cm. Besides, performance...
Abstract The design, construction, and commissioning of a novel liquid helium-free (LHe-free) Nb 3 Sn superconducting radio frequency (SRF) electron accelerator at the Institute Modern Physics Chinese Academy Sciences (IMP, CAS) will be presented. A 650 MHz 5-cell elliptical cavity was coated using tin vapor diffusion method for beam acceleration. slowly cooled down across 18 K with high-precision collaborative control ten individual GM cryocoolers. This process accompanied by characteristic...
Radiation-mode coupling is stronger and more efficient in tilted fiber Bragg gratings than other gratings; it can be used to good advantage such fields as optical communication sensors. A simplified coupled-mode theory (CMT) approach the analysis of radiation-mode proposed for what we believe first time, whose validity accuracy demonstrated by comparing its simulation results with that complete CMT equations volume current method (VCM). With approach, a theoretical spectral from core mode...
A compact in-fiber Mach-Zehnder interferometer comb-filter is demonstrated by splicing a section of twin-core fiber (TCF) between two single mode fibers (SMFs). The temperature and strain induced wavelength shifts the interference fringes are experimentally monitored. Redshift (i.e., to longer side) observed with sensitivity about 0.037 nm/°C for increased temperature, whereas blueshift shorter 0.866 pm/με applied changes. This device relatively simple fabricate expected have applications in...
A compact in-fiber Mach-Zehnder interferometer is demonstrated by splicing a section of twin-core fiber (TCF) between two single mode fibers (SMFs). Redshift observed with sensitivity about 0.037 nm/°C for increased temperature, whereas blueshift 0.866 pm/με applied strain changes.
An all-fiber two-cavity Fabry-Perot (FP) configuration based on fiber Bragg gratings (FBGs) is proposed. The characteristics of transmission spectra for the FP structure are theoretically analyzed and comprehensively modeled. explicit expression coefficient structures derived. general conditions lengths two cavities reflectivities FBGs presented to produce single resonant peak at central wavelength in FBG stop band. Based theoretical analysis, symmetric asymmetric simulated, simulation...
In this paper, bendloss characteristics of an optical fibre are investigated in detail, and the results show that resonator with a smaller ring radius, wider free spectrum range (FSR), higher fineness (f) quality-factor (Q) can be achieved by using microfibres. Based on improved fused taper technique, high-quality microfibre 5 pm radius has been fabricated, all-fibre micro-ring only 500 is realized self-coiling coupling method. The good-resonant characteristic makes device expected to avoid...
The characteristics of transmission spectra the all-fiber two-cavity Fabry-Perot (F-P) configuration based on fiber Bragg gratings (FBG) are theoretically analyzed and modeled. explicit expression coefficient for F-P structures is derived. When single resonant peak produced at central wavelength in FBG stop band, general conditions lengths two cavities reflectivities FBGs presented. Based theoretical analysis, symmetric asymmetric simulated, simulation results discussed explained...
The chirped moiré fiber grating (CMFG) is numerically analyzed by taking in count of the factors initial exposure phase, refractive index modulation strength and period difference. And several CMFGs with different amounts transmission peaks are fabricated dual-exposure a single phase mask. CMFG possesses excellent comb-like filtering characteristics including stable wavelength interval ultra-narrow pass-bands, so it suitable to serve as selective element. Moreover, its fabrication method...
Dual-wavelength with orthogonal polarizations erbium-doped fiber ring laser at room temperature is proposed. One polarization-maintaining Bragg grating (PMFBG) in a Sagnac loop interferometer used as the wavelength-selective filter. Due to polarization hole burning (PHB) enhanced by PMFBG, can operate stable dual-wavelength operation wavelength spacing of 0.336 nm adjusting controller (PC). The optical signal-to-noise ratio (OSNR) over 52 dB. amplitude variation nearly one and half an hour...
A type of multi-core Er-doped photosensitive silica optical fiber (MC-EDPF) is proposed and fabricated, in which a high consistency core surrounded by six Ge-doped cores. The design can overcome the difficulties encountered fabrication single-core EDPFs through modified chemical vapor deposition method combined with solution doping technology, there conflict between Er Ge doping. absorption MC-EDPFs achieved 15.876 dB/m at 1550nm 10 980nm. reflectivity Bragg gratings (FBGs) written directly...