High-sensitivity micro-strain sensing using broadband wavelength tunable thulium-doped all-fiber structured mode-locked laser

2021 ◽  
Author(s):  
Juan Wang ◽  
Ge Siyu ◽  
Ren Hongfei ◽  
Tao Huang ◽  
Peilong Yang ◽  
...  
Keyword(s):  
High Sensitivity ◽  
Strain Sensing ◽  
Wavelength Tunable ◽  
Mode Locked Laser

Conductive PVDF-HFP/CNT composites for strain sensing

2016 ◽  
Vol 09 (02) ◽  
pp. 1650024 ◽  
Author(s):  
Bin Hu ◽  
Yaolu Liu ◽  
Ning Hu ◽  
Liangke Wu ◽  
Huiming Ning ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Vinylidene Fluoride ◽  
High Sensitivity ◽  
Tunneling Effect ◽  
Gauge Factor ◽  
Metal Foil ◽  
Strain Sensing ◽  
Good Dispersion ◽  
Dispersion State ◽  
Addition Amount

A strain sensor based on the composites of poly (vinylidene fluoride-hexafluoropropylene) (PVDF-HFP) filled by multi-walled carbon nanotube (MWNT) was prepared using a proposed fabrication process. Three kinds of MWNT loadings, i.e., 1.0[Formula: see text]wt.%, 2.0[Formula: see text]wt.% and 3.0[Formula: see text]wt.% were employed. Due to good dispersion state of MWNT in PVDF-HFP matrix, which was characterized by scanning electron microscope (SEM), this sensor was found to be of high sensitivity and stable performance. The sensor’s piezoresistivity varied in a weak nonlinear pattern, which was probably caused by the tunneling effect among neighboring MWNTs. The gauge factor of the sensor of 1.0[Formula: see text]wt.% MWNT loading was identified to be the highest, i.e., 33. This sensor gauge factor decreased gradually with the increase of addition amount of MWNT, which was 5 for the sensor of 3.0[Formula: see text]wt.% MWNT loading. This gauge factor was still higher than that of conventional metal-foil strain sensors. The electrical conductivity of PVDF-HFP/MWNT composites was also studied. It was found that with the increase of the addition amount of MWNT, the electrical conductivity of the PVDF-HFP/MWNT composites varied in a perfect percolation pattern with a very low percolation threshold, i.e., 0.77 vol.%, further indicating the very good dispersion of MWNT in the PVDF-HFP matrix.

All-fiber wavelength-tunable bandpass filter based on core-mode conversion for mode-locked laser

2020 ◽  
Vol 59 (09) ◽  
Author(s):  
Peikang Cheng ◽  
Fan Shi ◽  
Linghao Meng ◽  
Teng Wang ◽  
Fufei Pang ◽  
...  
Keyword(s):  
Bandpass Filter ◽  
Mode Conversion ◽  
Core Mode ◽  
Wavelength Tunable ◽  
Mode Locked Laser ◽  
Tunable Bandpass Filter

scholarly journals Wavelength-Tunable Nonlinear Mirror Mode-Locked Laser Based on MgO-Doped Lithium Niobate

Crystals ◽  
2020 ◽  
Vol 10 (10) ◽  
pp. 861
Author(s):  
Lina Zhao ◽  
Luyang Tong ◽  
Fangxin Cai ◽  
Ye Yuan ◽  
Yangjian Cai
Keyword(s):  
Lithium Niobate ◽  
Continuous Wave ◽  
Maximum Output Power ◽  
Picosecond Laser ◽  
Output Pulse ◽  
Mode Locking ◽  
Maximum Output ◽  
Wavelength Tunable ◽  
Mirror Mode ◽  
Mode Locked Laser

We present a high-power, wavelength-tunable picosecond Yb3+: CaGdAlO4 (Yb:CALGO) laser based on MgO-doped lithium niobate (MgO:LN) nonlinear mirror mode locking. The output wavelength in the continuous wave (CW) regime is tunable over a 45 nm broad range. Mode locking with a MgO:LN nonlinear mirror, the picosecond laser is tunable over 23 nm from 1039 to 1062 nm. The maximum output power of the mode-locked laser reaches 1.46 W, and the slope efficiency is 18.6%. The output pulse duration at 1049 nm is 8 ps. The laser repetition rate and bandwidth are 115.5 MHz and 1.7 nm, respectively.

Nanoimprinted Polymer Micro/Nanofiber Bragg Gratings for High-Sensitivity Strain Sensing

2013 ◽  
Vol 25 (1) ◽  
pp. 22-24 ◽  
Author(s):  
Fuxing Gu ◽  
Huakang Yu ◽  
Wei Fang ◽  
Limin Tong
Keyword(s):  
High Sensitivity ◽  
Bragg Gratings ◽  
Strain Sensing

scholarly journals High-sensitivity distributed dynamic strain sensing by combining Rayleigh and Brillouin scattering

2020 ◽  
Vol 3 (12) ◽  
pp. 20001301-20001315
Author(s):  
Benzhang Wang ◽  
◽  
Dexin Ba ◽  
Qi Chu ◽  
Liqiang Qiu ◽  
...  
Keyword(s):  
Brillouin Scattering ◽  
High Sensitivity ◽  
Dynamic Strain ◽  
Strain Sensing
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