研究目的
Investigating the therapeutic effects of a specific herbal medicine on a particular disease.
研究成果
Reflection spectrum of a hybrid-structure fiber sensor based on two peanut-shape structures and a FBG is proposed. The measurement is based on the intensity demodulation and realizes the sensing by using the relationship between intensity of backwards transmitted cladding modes and curvature variation. This method simplifies the optical fiber sensing system and cuts down the potential cost.
研究不足
The cross sensitivity between curvature and temperature is a significant challenge. The interference dips drift with changes in both curvature and temperature.
1：Experimental Design and Method Selection:
The experiment involves monitoring the transmission spectrum of a hybrid-structure fiber sensor for curvature and temperature measurement.
2：Sample Selection and Data Sources:
The sensor consists of two peanut-shape structures and a FBG.
3：List of Experimental Equipment and Materials:
OSA (Optical Spectrum Analyzer), optical power meter, BBS (Broadband Source), SMF (Single-Mode Fiber), FBG (Fiber Bragg Grating), 3-dB coupler, three-port optical circulator.
4：Experimental Procedures and Operational Workflow:
The setup involves observing the transmission spectrum with an OSA and measuring the intensity of reflected cladding modes for curvature measurement.
5：Data Analysis Methods:
The relationship between the intensity of backwards transmitted cladding modes and curvature variation is analyzed.
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Optical Spectrum Analyzer
OSA
Used to observe the transmission spectrum
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optical power meter
Used to measure the intensity of the reflected cladding modes
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Broadband Source
BBS
Emits light that transmits in basic mode in the single-mode fiber core
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Single-Mode Fiber
SMF
Transmits light in basic mode
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Fiber Bragg Grating
FBG
Couples core mode into the cladding as backwards-transmitted cladding modes
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3-dB coupler
Divides backwards-transmitted core mode into two uniform power parts
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three-port optical circulator
Lets all of the backwards-transmitted cladding modes enter into the filter and measuring device
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