研究目的
Investigating the demonstration of dissipative soliton resonance (DSR) in a thulium-doped fiber laser (TDFL) at 1750 nm with a maximum single pulse energy of 321.2 nJ.
研究成果
The study successfully demonstrated dissipative soliton resonance (DSR) in a thulium-doped fiber laser (TDFL) at 1750 nm, achieving a maximum single pulse energy of 321.2 nJ. This advancement expands the operational wavelength coverage of TDFLs into the 1.7-μm region, with potential applications in bioimaging and material processing.
研究不足
The study is limited by the specific configuration of the TDFL and the components used, which may not be optimized for all potential applications. The operational wavelength and pulse energy may also be constrained by the materials and design.
1：Experimental Design and Method Selection
The experiment was designed to demonstrate dissipative soliton resonance (DSR) in a thulium-doped fiber laser (TDFL) at 1750 nm. The methodology involved constructing a ring cavity with specific components to achieve mode-locking and DSR operation.
2：Sample Selection and Data Sources
The gain fiber was a segment of 3-m long TDF (Nufern, SM-TSF-9/125), pumped by a commercial 1650 nm Raman fiber laser.
3：List of Experimental Equipment and Materials
Wavelength-division multiplexer (WDM),Optical coupler (OC),Thulium-doped fiber (TDF),Raman fiber laser,Quarter-wave plates (QWPs),Half-wave plate (HWP),Polarization sensitive isolator (ISO),Collimators (COLs),Silver coated mirrors (Ms),Bandpass filter (BPF),Single mode fiber (SMF)
4：Experimental Procedures and Operational Workflow
The setup involved constructing a ring cavity with the TDF as the gain medium, pumped by a Raman fiber laser. Mode-locking was initiated and maintained using QWPs, a HWP, and an ISO through the nonlinear polarization rotation (NPR) effect. A BPF was used to force operation in the 1.7-μm band, and a segment of SMF was added to enhance the NPR effect.
5：Data Analysis Methods
The optical spectrum, pulse train, and output power were analyzed to confirm the DSR operation and measure the pulse energy and width.
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Wavelength-division multiplexer
WDM
Used to form the ring cavity in the experimental setup.
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Optical coupler
OC
Used with the 20% port as the output in the ring cavity.
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Thulium-doped fiber
SM-TSF-9/125
Nufern
Used as the gain fiber in the laser setup.
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Raman fiber laser
Used to pump the thulium-doped fiber.
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Quarter-wave plate
QWP
Used in the nonlinear polarization rotation (NPR) effect for mode-locking.
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Half-wave plate
HWP
Used in the nonlinear polarization rotation (NPR) effect for mode-locking.
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Polarization sensitive isolator
ISO
Used in the nonlinear polarization rotation (NPR) effect for mode-locking.
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Collimator
COL
Used to direct light between the fiber part and the NPR assembly.
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Silver coated mirror
M
Used to direct light between the fiber part and the NPR assembly.
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Bandpass filter
BPF
Used to force the cavity to operate in the 1.7-μm band.
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Single mode fiber
SMF
Added to the cavity to enhance the NPR effect.
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