研究目的
Investigating the design and performance of an all-optical modulator based on reduced graphene oxide coated D-shaped fiber waveguide for applications in all-optical switching and communication.
研究成果
The all-optical modulator based on reduced graphene oxide coated D-shaped fiber demonstrated a high modulation depth of 8 dB and a modulation rate of 50 kHz, with potential applications in all-optical communication and switching. The device's compatibility with optical fiber systems, ease of fabrication, and low cost make it a promising candidate for photonics applications.
研究不足
The study does not explore modulation frequencies beyond 50 kHz, and the practical integration of the modulator into existing optical communication systems is not discussed.
1：Experimental Design and Method Selection:
The study designed an all-optical modulator using a reduced graphene oxide coated D-shaped fiber structure, employing an evanescent-field-induced deposition method.
2：Sample Selection and Data Sources:
The D-shaped fiber was fabricated by side grinding a single-mode fiber. Reduced graphene oxide (RGO) was prepared and deposited on the fiber.
3：List of Experimental Equipment and Materials:
Equipment included a picosecond pulse laser, variable optical attenuator, optical coupler, power meters, photodetectors, and an oscilloscope. Materials included RGO powder and alcohol for solution preparation.
4：Experimental Procedures and Operational Workflow:
The RGO was deposited on the D-shaped fiber using optical deposition, with real-time monitoring of output power. The nonlinear saturable absorbance properties were measured using a picosecond pulse laser.
5：Data Analysis Methods:
The relationship between input power and transmittance was analyzed to determine saturable absorption effects and modulation performance.
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confocal microscopy system
Alpha 500R
WI Tec
Used to measure the Raman spectrum of the RGO.
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atomic force microscope
Dimension Icon
Bruker
Used to measure the thickness of the RGO nanosheets.
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photodetector
DET08CFC/M
Thorlabs
Used to detect the switch light and signal light.
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oscilloscope
DPO 7254C
Tektronix
Used to acquire the waveform of switch light and signal light.
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single-mode fiber
SM-SX-0.9 mm-G652D
Used as the base material for fabricating the D-shaped fiber.
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variable optical attenuator
Used to adjust the input power for measuring the transmission dependent on input power.
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optical coupler
50:50
Used to split the light into two equal ports for monitoring and coupling into the RGODF.
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