研究目的
Investigating the fabrication and application of an encoded FBG array as an optical fiber tag using a femtosecond laser line-by-line technique.
研究成果
The encoded FBG can be used as an optical fiber tag to distinguish data transmission cables. Encoded information can be acquired from the backscattered optical signal in the fiber, and the local spectrum of the internal grating fragments can be used to enlarge the encoding capacity or encrypt the encoded FBG.
研究不足
The fabrication speed of LBL Fs laser inscription is slow, but it offers good machining flexibility and satisfying grating spectrum.
1：Experimental Design and Method Selection:
The study employed a femtosecond laser line-by-line (LBL) technique for FBG inscription, offering improved machining flexibility.
2：Sample Selection and Data Sources:
Single-mode fiber (SMF, Corning SMF-28) was used for the fabrication of FBGs.
3：List of Experimental Equipment and Materials:
The setup included a femtosecond laser amplifier, a variable attenuator, a 63× objective lens, and a three-axis translation stage.
4：Experimental Procedures and Operational Workflow:
The FBGs were inscribed by translating the fiber with respect to the focal point of the laser beam, following a designed pattern.
5：Data Analysis Methods:
Encoded information was analyzed by measuring the backscattered optical signal using an optical backscatter reflectometer.
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optical backscatter reflectometer
OBR 5T-50
LUNA TECH
Measuring backscattered light as a function of distance
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femtosecond laser amplifier
PH1-10
Light Conversion
Emitting laser pulses for FBG inscription
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objective lens
63×
Zeiss
Focusing the fs laser beam into the fiber
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translation stage
X: ABL10100-LN; Y: ABL10100-LN; Z: ANT130V-5-CN1-PL2
Aerotech
Translating the fiber for FBG inscription
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optical spectrum analyzer
AQ6370C
Yokagawa
Measuring transmission and reflection spectra
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