A5088661844- Advanced Fiber Optic Sensors
- Photonic and Optical Devices
- Underwater Acoustics Research
- Magneto-Optical Properties and Applications
- Ocular and Laser Science Research
- Advanced Photonic Communication Systems
- Analytical Chemistry and Sensors
- Laser Material Processing Techniques
- Speech and Audio Processing
- Direction-of-Arrival Estimation Techniques
- Blind Source Separation Techniques
- Nonlinear Optical Materials Studies
- Antenna Design and Optimization
Harbin Engineering University
2019-2022
University of Shanghai for Science and Technology
2019-2020
Ministry of Industry and Information Technology
2019
A kind of compact all-fiber-optic vector magnetic sensor is proposed and demonstrated. The consists a side-polished-fiber (SPF)-integrated with singlemode-no core-singlemode (SNS) fiber structure. section side-polished breaks the axially symmetry composite as-fabricated supports sensing has field strength sensitivity up to -2370 pm/mT over 2-6 mT range. physical mechanism that modal interference strongly influenced by refractive index (RI) near surface. advantages lie in low cost, simple...
A kind of composite structure consisting Mach-Zehnder interferometer (MZI) cascaded with fiber Bragg grating (FBG) is proposed for simultaneous measurement magnetic field and temperature. The MZI consists a pair up-tapered joints, which are used to excite high order modes re-couple them the core. immersed in fluid make it magnetically sensitive. FBG employed temperature compensation. Simultaneous can be achieved by monitoring transmission spectra FBG. sensitivity sensing up 407.82 pm/mT...
Direction-of-arrival (DOA) estimation is widely used in underwater detection and localization. To address the high-resolution DOA problem, a DenseBlock-based U-net structure proposed this paper. U-shaped fully convolutional neural network, which yields two-dimensional image. DenseBlock more efficient than typical layers. The network replaces concatenated layers original with DenseBlocks. Through training, can remove interference of sidelobes noise conventional beam forming bearing-time...
A π phase-shifted fiber Bragg grating (PS-FBG) with reduced diameter is proposed for sensing applications.To achieve high sensitivity, etching and side polishing are used to decrease the of PS-FBG.The transmission peak undergoes a clear redshift refractive index increase, sensitivity 3815 pm/RIU when surrounding ranges from 1.41514 1.45450.The structure also sensitive ambient temperature 25 55 °C.Experimental results show that sensitivities 12.26, 12.54, 19.51 pm/℃ PS-FBGs diameters 125, 87,...
For active sonar systems, coherent interference, such as direct-path wave and strong multi-path, will shield the weak target echo signal, which is one of main factors affecting detection performance. Null steering beamforming an important signal processing method that suppresses interference. In this paper, second-order cone programming (SOCP) used to perform null on uniform linear array. Beam caused in direction interference suppress system during detection. However, there are two...