研究目的
Investigating the ultra-fast and ultra-stable position-finding and measurement using a fiber Bragg grating sensor based on optoelectrical oscillation.
研究成果
The proposed FBG sensor based on optoelectrical oscillation demonstrates ultra-fast response and ultra-stable performance for position-finding and measurement. The technique effectively maps environmental influences to oscillation frequencies, offering high resolution and stability.
研究不足
The approach requires precise alignment and tuning of the laser wavelength relative to the FBG's reflection spectrum. The system's performance may be affected by the quality of the FBG and the stability of the OEO loop components.
1：Experimental Design and Method Selection:
The methodology involves using an optoelectrical oscillator (OEO) incorporating a uniform strong fiber Bragg grating (FBG) for sensing. The oscillation frequency is mapped to the target position due to external changes affecting the FBG's reflection spectrum.
2：Sample Selection and Data Sources:
A uniform FBG is used as the sensing medium, inserted into the loop via an optical circulator.
3：List of Experimental Equipment and Materials:
Includes a tunable laser source (TLS, Agilent 81989A), Mach-Zehnder modulator (MZM, iXblue MXER-LN-10), polarization controller (PC), optical spectrum analyzer (OSA, ANDO AQ6317), photodetector (PD), electrical amplifier (EA), and electrical bandpass filter (EBPF).
4：Experimental Procedures and Operational Workflow:
The setup involves generating an optical carrier, modulating it, inserting the FBG into the loop, and converting the reflected light into an electrical signal for oscillation detection.
5：Data Analysis Methods:
The oscillation frequency and amplitude are analyzed to determine the target position and environmental influences like strain and temperature.
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tunable laser source
81989A
Agilent
Generates an optical carrier at a central wavelength for the experiment.
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Mach-Zehnder modulator
MXER-LN-10
iXblue
Modulates the optical pulse for the sensing system.
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optical spectrum analyzer
AQ6317
ANDO
Analyzes the optical spectrum of the signal.
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photodetector
Converts the optical signal into an electrical signal.
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electrical bandpass filter
Filters the electrical signal to ensure single-mode operation.
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