A5102011306- Advanced Fiber Optic Sensors
- Photonic and Optical Devices
- Advanced Fiber Laser Technologies
- Photonic Crystal and Fiber Optics
- Optical Network Technologies
- Advanced Sensor Technologies Research
- Optical Coherence Tomography Applications
- Power Systems and Technologies
- Advanced Photonic Communication Systems
- Advanced MEMS and NEMS Technologies
- Optical Systems and Laser Technology
- Advanced Measurement and Metrology Techniques
- Advanced Surface Polishing Techniques
Harbin Engineering University
2023-2025
Ministry of Industry and Information Technology
2024
Nankai University
2010
Beijing Jiaotong University
2008
The realization of a miniaturized spectrometer with high resolution is highly desired but still big challenge. Although all-fiber spectrometers based on speckle detection show their great potential for ones, long fiber lengths set the greatest obstacle design. Here, we demonstrate compact by using cascading coreless fibers and photonic crystal fibers. A unique cascaded structure readily excites more guided modes, in which patterns are formed modal interferences. Using only 10 cm-long...
We experimentally demonstrate a single mode fiber (SMF) ultrasensitive refractive index (RI) sensor based on long-period grating (LPFG) with periodic microcavities fabricated by femtosecond laser. The liquid in the causes strong RI modulation to excite high-order cladding modes. proposed can operate reflection coating end face of gold film, as result cascade LPFG structure is equivalently formed increase contrast resonance dip. has an ultra-high sensitivity -12576 nm/RIU high linearity range...
A temperature sensor based on a side-polished two-core fiber (SPTCF) Michelson interferometer (MI) was demonstrated. The is composed of standard single-mode (SMF), segment tapered TCF, and SPTCF coated with polydimethylsiloxane (PDMS). When the changes, effective refractive index (RI) polished core (PC) resulting in shift interference fringes to measure ambient temperature. experimental results show that has sensitivity up 694.3 pm/°C range 25–75 °C, meanwhile device minimally affected by...
We demonstrate a vector bending sensor operated in reflection mode based on hole-assisted three-core fiber (HATCF) coupler. The is built by splicing piece of HATCF with gold film-coated end to single-mode (SMF). film the center core etched femtosecond laser and only lights transmitted two suspended cores are reflected. couples at different wavelengths, respectively. direction curvature identified monitoring wavelength coupled peaks. maximum sensitivity 15.146 nm/m −1 . temperature less than...
The fiber Bragg grating (FBG) was written in hollow suspended-core (HSCF) using femtosecond laser point-bypoint technology. HSCF based-FBG has a higher refractive index (RI) sensitivity to liquid the air hole because core of is completely exposed air. In RI range 1.35~1.45, reflection peak FBG moves toward longer wavelength with increase external RI. shift greater for RI, which means that HSCF-FBG high environment. 14.24 nm /RIU 1.42~1.44. axial strain sensor 1.02 pm /με 0~900 με, and...