High-resolution fibre-grating based strain sensor with interferometric wavelength-shift detection

1992 ◽  
Vol 28 (3) ◽  
pp. 236 ◽  
Author(s):  
A.D. Kersey ◽  
T.A. Berkoff ◽  
W.W. Morey
Keyword(s):  
High Resolution ◽  
Strain Sensor ◽  
Wavelength Shift ◽  
Shift Detection

High-resolution, high-frequency wavelength shift detection of optical signals with low-cost, compact readouts

2015 ◽  
Author(s):  
A. Schuh ◽  
A. Hegyi ◽  
A. Raghavan ◽  
A. Lochbaum ◽  
J, Schwartz ◽  
...  
Keyword(s):  
High Resolution ◽  
High Frequency ◽  
Low Cost ◽  
Wavelength Shift ◽  
Optical Signals ◽  
Shift Detection

A high-resolution random fiber laser static strain sensor

2022 ◽  
Author(s):  
Peide Liu ◽  
Zhichen Hu ◽  
Lijie Yang ◽  
Yi Zheng
Keyword(s):  
High Resolution ◽  
Fiber Laser ◽  
Strain Sensor ◽  
Static Strain

Wavelength-shift detection system based on matching-FBG with enhanced temperature sensitivity

2006 ◽  
Vol 2 (2) ◽  
pp. 139-141 ◽  
Author(s):  
Zhi-guo Zhang ◽  
Fu-gen Su ◽  
Min Zhang ◽  
Pei-da Ye
Keyword(s):  
Temperature Sensitivity ◽  
Detection System ◽  
Wavelength Shift ◽  
Shift Detection

scholarly journals Orthogonal Demodulation Pound–Drever–Hall Technique for Ultra-Low Detection Limit Pressure Sensing

Sensors ◽  
2019 ◽  
Vol 19 (14) ◽  
pp. 3223 ◽  
Author(s):  
Jinliang Hu ◽  
Sheng Liu ◽  
Xiang Wu ◽  
Liying Liu ◽  
Lei Xu
Keyword(s):  
Detection Limit ◽  
Detection Method ◽  
Wavelength Shift ◽  
Pressure Sensing ◽  
Frequency Sensitivity ◽  
Lower Detection Limit ◽  
Lower Detection ◽  
Shift Detection ◽  
Quality Factor Q ◽  
Hall Technique

We report on a novel optical microcavity sensing scheme by using the orthogonal demodulation Pound–Drever–Hall (PDH) technique. We found that larger sensitivity in a broad range of cavity quality factor (Q) could be obtained. Taking microbubble resonator (MBR) pressure sensing as an example, a lower detection limit than the conventional wavelength shift detection method was achieved. When the MBR cavity Q is about 105–106, the technique can decrease the detection limit by one or two orders of magnitude. The pressure-frequency sensitivity is 11.6 GHz/bar at wavelength of 850 nm, and its detection limit can approach 0.0515 mbar. This technique can also be applied to other kinds of microcavity sensors to improve sensing performance.

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