A5043201047- Optical Network Technologies
- Advanced Photonic Communication Systems
- Photonic and Optical Devices
- Advanced Fiber Laser Technologies
- Advanced Fiber Optic Sensors
- Semiconductor Lasers and Optical Devices
- Photonic Crystal and Fiber Optics
- Magneto-Optical Properties and Applications
- Neural Networks and Reservoir Computing
- Surface Roughness and Optical Measurements
- Mechanical and Optical Resonators
- Optical Coherence Tomography Applications
- Quantum Mechanics and Non-Hermitian Physics
- Spectroscopy and Laser Applications
- Optical Wireless Communication Technologies
- Ultra-Wideband Communications Technology
- Telecommunications and Broadcasting Technologies
- Analytical Chemistry and Sensors
- Advanced Memory and Neural Computing
- Advanced MEMS and NEMS Technologies
- Advanced Optical Network Technologies
- Full-Duplex Wireless Communications
- Advanced Optical Sensing Technologies
- Optical Systems and Laser Technology
- Tactile and Sensory Interactions
Beijing Jiaotong University
2016-2025
Lightwave Photonics (United States)
2024
University of Ottawa
2013
Ministry of Education
2009
Computer Network Information Center
2009
Frequency quadrupling for tunable microwave and sub-terahertz generation using a single polarization modulator (PolM) in Sagnac loop without an optical filter or wideband phase shifter is proposed experimentally demonstrated. In the system, linearly polarized continuous wave from laser source (TLS) split into two orthogonally waves by beam splitter (PBS) sent to traveling along clockwise counter-clockwise directions. A PolM which reference signal applied incorporated loop. The traveling-wave...
A magnetic field sensor using a dual-frequency optoelectronic oscillator (OEO) incorporating cascaded magnetostrictive alloy-fiber Bragg grating-Fabry Perot (MA-FBG-FP) and FBG-FP filters is proposed demonstrated. In the OEO resonant cavity, two microwave signals are generated, whose oscillation frequencies determined by filter MA-FBG-FP with ultra-narrow notches laser sources. Due to characteristics of MA FBG, generated show different temperature sensitivities. By monitoring variations...
A novel differential intensity-measurement high-sensitivity refractive index (RI) sensor based on cascaded dual-wavelength fiber laser and single-mode-no-core-hollow-core-no-core-single-mode (SNHNS) structure is proposed demonstrated. The sensing unit consists of one uniform Bragg grating (FBG) an SNHNS as all-fiber interferometer filter. has a ring cavity composed two FBGs with central wavelengths 1550.10nm 1553.61nm. Through monitoring the wavelength shift output power difference laser,...
Optoelectronic oscillator (OEO) has received growing attentions from researchers in the field of demodulations for optical sensors because its excellent performance combining optics and electronics signal processing. In this article, we present a wideband-tunable OEO angular velocity measurement. The consists two cascaded microwave photonic filters (MPFs), namely, dispersion-induced MPF mainly determining OEO's oscillating frequency two-tap fine selection frequency. With proper control...
An optical vector network analyzer (OVNA) based on unbalanced double-sideband (UB-DSB) modulation with improved measurement accuracy is proposed and experimentally demonstrated. It different from an OVNA single-sideband (OSSB) in which one-to-one mapping between the radio frequency responses employed to measure magnitude phase of component, technique measures by taking into consideration power other sideband through solving two equations that are associated UB-DSB modulation, thus errors due...
An ultrafast high-sensitivity refractive index (RI) and temperature-sensing system based on an optoelectronic oscillator (OEO) is proposed demonstrated in this paper. A Fabry–Perot fiber Bragg grating (FP-FBG), which combines a gap with two FBGs silica V-shaped slot characterizes narrow notch the reflection spectrum, incorporated OEO to implement microwave photonic filter perform oscillating frequency selection. signal generated by OEO, whose determined center of FP-FBG notch, varies...
A novel photonics-assisted method for tunable microwave frequency comb (MFC) generation based on an actively mode-locked optoelectronic oscillator (AML-OEO) is proposed and experimentally demonstrated in this letter. Two key factors the system, periodic gain modulation widely center frequency, are implemented by externally introduced intensity-modulated optical signal a photonic filter (MPF) phase-shifted fiber Bragg grating (PS-FBG) respectively. Unlike conventional OEO with only one...
An Hz-magnitude ultra-narrow linewidth single-frequency Brillouin fiber laser (BFL) is proposed and experimentally demonstrated. The single frequency of the selected by parity-time (PT) symmetry, which consists a stimulated scatter (SBS) gain path excited 24 km single-mode (SMF) an approximately equal length loss tuned with variable optical attenuator (VOA). These paths are coupled through Bragg grating (FBG) into wavelength space. Accomplishing oscillation involves precise adjustment...
A block-based mode decomposition (BMD) algorithm is proposed in this paper, which reduces computational complexity and enhances noise resistance. The BMD uses randomly selected sample blocks of the beam images to restore coefficients instead all pixels images. It allows for any shape, such as triangles. In noise-free simulations, compared spatially degenerated (SPMD) algorithm, requires only 1% multiplication operations, thereby significantly increasing efficiency while maintaining a high...
In this paper, an adaptive frequency-domain block equalizer (FDBE) implementing the moment estimation (Adam) algorithm is proposed for mode-division multiplexing (MDM) optical fiber communication systems. By packing all frequency components into frequency-dependent blocks of a specified size B, we define equalization matrix to simultaneously compensate multiple at each block, which computed iteratively using Adam, recursive least squares (RLS) and mean (LMS) algorithms. Simulations show that...
A high-sensitivity magnetic field sensor based on an optoelectronic oscillator (OEO) with a Mach–Zehnder interferometer (MZI) is proposed and experimentally demonstrated. The consists of fiber interferometer, the lower arm wound around magnetostrictive transducer. Due to effect, optical phase shift induced by variation generated between two orthogonal light waves transmitted in upper arms MZI. polarization-dependent property modulator (MZM) utilized transform into difference sidebands...
A novel approach to the generation of an optical frequency comb with a widely tunable center wavelength and spacing based on optoelectronic oscillator (OEO) is proposed experimentally demonstrated. The OEO implemented using polarization modulator (PolM), phase-shifted fiber Bragg grating (PS-FBG), photodetector (PD). PolM special phase that supports modulation along two principal axes opposite indexes. joint operation PolM, PS-FBG, PD corresponds frequency-tunable microwave photonic bandpass...
A dual-frequency optoelectronic oscillator (OEO) incorporating a polarization-maintaining fiber Bragg grating (PMFBG) Fabry-Perot filter for high-sensitivity and high-speed axial strain temperature sensing is proposed experimentally demonstrated. In the OEO loop, two oscillation frequencies are determined by PMFBG with ultra-narrow notches laser sources which operate as dual-passband microwave photonic filter. The birefringence affected far less than temperature. Through monitoring...