A5088219638- Optical Network Technologies
- Photonic and Optical Devices
- Advanced Photonic Communication Systems
- Advanced Fiber Optic Sensors
- Advanced Fiber Laser Technologies
- Advanced Optical Network Technologies
- Semiconductor Lasers and Optical Devices
- Optical Wireless Communication Technologies
- Advanced Wireless Communication Techniques
- Peer-to-Peer Network Technologies
- Network Traffic and Congestion Control
- Error Correcting Code Techniques
- Cloud Computing and Resource Management
- PAPR reduction in OFDM
- Orbital Angular Momentum in Optics
- Distributed and Parallel Computing Systems
- Mechanical and Optical Resonators
- Ultra-Wideband Communications Technology
- Advanced Optical Sensing Technologies
- Software-Defined Networks and 5G
- Optical Systems and Laser Technology
- Gyrotron and Vacuum Electronics Research
- Advancements in PLL and VCO Technologies
- Photonic Crystal and Fiber Optics
- Caching and Content Delivery
Wuhan Sports University
2022-2025
Beijing University of Posts and Telecommunications
2015-2024
South China University of Technology
2018-2024
State Key Laboratory of Information Photonics and Optical Communications
2012-2024
Anhui University of Traditional Chinese Medicine
2024
Zhongshan Hospital of Xiamen University
2023
Shanghai Electric (China)
2023
Fiberhome Technology Group (China)
2021
Technical University of Denmark
2021
Peking University
2009
Abstract Distributed optical fibre sensors deliver a map of physical quantity along an fibre, providing unique solution for health monitoring targeted structures. Considerable developments over recent years have pushed conventional distributed towards their ultimate performance, while any significant improvement demands substantial hardware overhead. Here, technique is proposed, encoding the interrogating light signal by single-sequence aperiodic code and spatially resolving information...
A distributed fiber optic vibration sensor is described, in which two Michelson interferometers are used as phase detectors and 3×3 couplers deployed to demodulate the time-varying change caused by vibration. The separated four wavelength division multiplexers. position of obtained signal correlation, can be a perimeter security locate intruder. experimental results with 4012 m discussed.
This paper numerically and experimentally investigates the performance of free-space optical receiver using modes diversity coherent receipt under moderate-to-strong turbulence. By utilizing a three-mode photonic lantern with digital maximum ratio combining, 40 Gbps QPSK signal is received. The turbulence strength measured by beam diameter to atmospheric coherence length, D/r0. larger D/r0, stronger is, vice versa. Compared conventional single mode fiber based receipt, required transmitted...
A tunable multiwavelength fiber laser with ultra-narrow wavelength spacing and large number using a semiconductor optical amplifier (SOA) has been demonstrated.Intensity-dependent transmission induced by nonlinear polarization rotation in the SOA accounts for stable operation less than homogenous broadening linewidth of SOA.Stable lasing as small 0.08 nm up to 126 is achieved at room temperature.Moreover, tuning 20.2 implemented via tuning.
A Brillouin optical time-domain analysis (BOTDA) scheme based on hybrid amplification, consisting of a distributed Raman amplification and lumped provided by remotely pumped Erbium-doped fibers, is proposed thoroughly studied, enabling longest sensing distance among existing repeaterless techniques. First, the criteria for optimizing powers entering fiber are defined. Then, walk-off effect in forward associated self-phase modulation pointed out analyzed to describe BOTDA pulse distortion its...
A simple and practical photonic approach for microwave instantaneous frequency measurement has been proposed experimentally demonstrated. The unknown signal with its to be measured is carrier-suppressed modulated on the lightwave by a Mach-Zehnder modulator biased at minimum point. And thanks inherent complementary transmission responses of interferometer (MZI), fixed relationship between amplitude comparison function established. By monitoring processing optical powers two output ports MZI,...
In this Letter, we theoretically and experimentally demonstrate a new method to generate tunable orbital angular momentum (OAM) by continuously changing the angle of linear polarization input light. We use Fourier series left- right-hand projections prove that average OAM smoothly varied from l=-1 l=1 with LP light 0 π, which is fulfilled an electrical controller.
We propose a linear mapping relationship between the polarization of fundamental mode and cylindrical vector (CV) modes on first-order Poincaré sphere (FOPS) in fiber. The new method is based four-dimensional complex Jones matrices terms linearly polarized bases. With our theoretical model, an all-fiber approach to generate arbitrary CV beams FOPS proposed theoretically verified experimentally. In experiment, through combination converter two-segment cascaded few-mode fiber with fixed...
The real-time CCDM and inverse were realized in an FPGA. DM achieved a throughput of 16.8GBaud supported on-line reconfiguration to realize different entropies with fine granularity.
Design optimization of a novel integrated bi-directional (BiDi) triplexer filter based on planar lightwave circuit (PLC) for fiber-to-the premise (FTTP) applications is described. A multi-mode interference (MMI) device used to the up-stream 1310nm signal from down-stream 1490nm and 1555nm signals. An array waveguide grating (AWG) performs dense WDM function by further separating two The MMI AWG are built same substrate with monolithic integration. design validated simulation, which shows...
An approach is proposed in this paper to generate ultra-wideband (UWB) pulses based on cross-phase modulation (XPM) effects nonlinear optical loop mirror (NOLM). The NOLM can be considered as an switch which controlled by pump positive and negative Gaussian pulses, are then delayed SMF combined both monocycle doublet pulses. These two pulse shapes switched at a high speed controlling the on-off of one probe. In addition, acting chromatic dispersion media generating UWB also used distribute...
A comprehensive review of the optical transceivers for fiber-to-the-premises applications is presented, with emphasis on system requirements and enabling technologies. Recent progress in photonic integration to realize low-cost, high-performance, compact network terminal reviewed
This work presents our recent progress on advanced radio-over-fiber (ROF) technologies for in-building optical-wireless access networks, including multiservice, full-duplex, and polarization diversity ROF system design, as well the experimental delivery of uncompressed high-definition television (HDTV) signals. The novel technique is proposed to improve receiving sensitivity increase anti-interference capacity wireless transmission at environment. Furthermore, integration architecture...
Elliptical-core few mode fiber (EC-FMF) is used in a division multiplexing (MDM) transmission system to release multiple-input-multiple-output (MIMO) digital-signal-processing, which reduces the cost and complexity of receiver. However, EC-FMF does not match with conventional multiplexers/de-multiplexers (MUXs/DeMUXs) such as photonic lantern, leading extra coupling loss crosstalk. We design elliptical-core mode-selective lanterns (EC-MSPLs) six modes, can well MIMO-free MDM systems....
In this paper, a polar coded probabilistic shaping (PS) 8-ary pulse amplitude modulation (PAM8) based on many-to-one (MTO) mapping is investigated for short-reach optical interconnection. By ingeniously assigning parity bits to ambiguities positions, no extra PS redundancy and complex distribution matcher are required in the scheme comparing traditional (PAS). The noise distributions after different transmission distances studied an optimal clock recovery method signal proposed degrade...
We propose and experimentally demonstrate a scheme to simultaneously realize multi-channel centimeter wave (CMW) band millimeter (MMW) ultra-wideband (UWB) monocycle pulse generation using four mixing (FWM) effect in highly nonlinear photonic crystal fiber (HNL-PCF). Two lightwaves carrying polarity-reversed optical Gaussian pulses with appropriate time delay another lightwave 20 GHz clock signal are launched into the HNL-PCF together. By filtering out FWM idlers, two CMW-band UWB signals...
We propose an improved pilot-aided (PA) optical carrier phase recovery (CPR) method, using average operation for noise suppression in PA coherent systems. Performance of this method is investigated and compared with other CPR methods through simulations 28 Gbaud QPSK, 16-, 64-QAM Results show that PA-CPR averaging greatly outperforms without averaging, achieves better or similar performance PAor non-PA-CPR methods. In addition, we a maximum likelihood (ML) estimation following to further...