研究目的
To fabricate and demonstrate a novel multi-wavelength continuous Thulium-doped fibre laser incorporating a microfibre coil resonator based on black phosphorus (MCR-BP) material.
研究成果
A stable twelve-wavelength continuous Tm-doped fibre laser based on a novel device with a microfibre coil resonator incorporating black phosphorus has been successfully fabricated and demonstrated. The device combines a comb filter effect and a four-wave-mixing effect caused by the nonlinearity of black phosphorus, resulting in excellent performance with a channel spacing of 0.54 nm, an extinction ratio of more than 40 dB, and power fluctuation between channels of less than 1.6 dB.
研究不足
The study does not discuss the potential for scaling the number of emission peaks beyond twelve or the impact of environmental factors on the stability of the laser output.
1：Experimental Design and Method Selection:
The study involved the fabrication of a microfibre coil resonator incorporating black phosphorus (MCR-BP) and its integration into a Thulium-doped fibre laser system to achieve multi-wavelength operation.
2：Sample Selection and Data Sources:
A microfibre with a
3：24 μm waist diameter was fabricated using the fused taper method. Black phosphorus was prepared using the liquid-phase exfoliation method. List of Experimental Equipment and Materials:
Equipment included a supercontinuum light source, an optical spectrum analyzer (OSA), a tunable laser, an EDFA, a wavelength division multiplexer (WDM), a polarization independent isolator (PI-ISO), and a 10/90 optical coupler (OC). Materials included a PMMA rod, UV-curable low refractive index epoxy, and black phosphorus.
4：Experimental Procedures and Operational Workflow:
The MCR-BP device was fabricated and characterized. It was then inserted into the fibre laser cavity, and the output spectrum was measured using the OSA.
5：Data Analysis Methods:
The spectral characteristics of the resonator were analyzed, and the performance of the laser system was evaluated based on the number of wavelengths, channel spacing, extinction ratio, and stability.
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optical spectrum analyzer
AQ-6370C
YOKOGAWA
Used to measure the output spectral response.
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tunable laser
TSI-710
Santec
Used as the pump source centered at 1562 nm.
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digital storage oscilloscope
MDO4054-6
Tektronix
Used to monitor the temporal characteristics of the 12-wavelength device.
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supercontinuum light source
YSLSC-series
Used as a broadband light input with a range of 470-2400 nm.
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EDFA
MC-EDFA-230
Used as the pump source with a maximum power value of 700 mW.
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wavelength division multiplexer
MCWDM-15/19
Inserted into the fibre laser cavity to pump the gain medium.
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polarization independent isolator
MCI-1980
Used to maintain a unidirectional linear lasing.
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optical coupler
1980-FBT-C
Connected with the PI-ISO to measure the output spectrum.
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photodetector and amplifier
MC-PD-05
Used in conjunction with the DSO to monitor the temporal characteristics.
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