研究目的
Investigating the generation of high-power dissipative soliton resonance pulses in a compact linear-cavity Yb-doped fiber laser.
研究成果
The study successfully demonstrates an ultra-compact sub-nanosecond Yb-doped fiber laser operating under DSR regime, achieving a maximum output average power of 2.4 W. The laser's compact design and high output power make it suitable for applications in material processing and optical communications.
研究不足
The maximum output power is limited by the available pump power. The pulse profile's smoothness is affected by the oscilloscope's sampling rate.
1：Experimental Design and Method Selection
The study employs a linear-cavity configuration formed by a highly reflective fiber Bragg grating and a nonlinear optical loop mirror (NOLM) to achieve mode-locked operation under dissipative soliton resonance (DSR) regime.
2：Sample Selection and Data Sources
A section of Yb-doped double-clad fiber is used as the gain medium, pumped by a 915 nm laser diode.
3：List of Experimental Equipment and Materials
Yb-doped double-clad fiber, 915 nm laser diode, highly reflective fiber Bragg grating at 1066 nm, 5/95 optical coupler, polarization controller, optical spectrum analyzer (OSA, YOKOGAWA AQ6370C), digital oscilloscope (LeCroy SDA 6000A).
4：Experimental Procedures and Operational Workflow
The laser setup involves pumping the Yb-doped fiber, adjusting the polarization state with a PC to achieve stable mode-locking, and measuring the output with an OSA and oscilloscope.
5：Data Analysis Methods
Analysis of optical spectra, pulse trains, and RF spectra to characterize the DSR pulses.
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Optical spectrum analyzer
AQ6370C
YOKOGAWA
Measures the optical spectrum of the fiber laser output.
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Digital oscilloscope
SDA 6000A
LeCroy
Records the pulse trace of the fiber laser output.
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Yb-doped double-clad fiber
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Used as the gain medium in the fiber laser.
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915 nm laser diode
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Pumps the Yb-doped fiber to achieve lasing.
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Fiber Bragg grating
Highly reflective at 1066 nm
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Acts as a cavity mirror in the linear-cavity configuration.
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Optical coupler
5/95
Not provided
Forms part of the NOLM, providing power output and acting as a cavity mirror.
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Polarization controller
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Adjusts the polarization state to achieve stable mode-locked pulse output.
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