研究目的
Investigating the generation of L-band dissipative soliton resonance (DSR) nanosecond Er-doped fiber laser with switchable wavelengths and tunable pulse durations.
研究成果
The study successfully demonstrates a wavelength-switchable and duration-tunable mode-locked fiber laser based on the figure-of-eight construction, launching 4 DSR pulses in L-band with different central wavelengths. The flexibility of switching and tuning pulse parameters is potentially well-suited for applications in laser detection, high-energy physics experiments, and other fields.
研究不足
The study is limited to the L-band wavelength range and the specific configuration of the figure-eight fiber laser. The tunability and switchability are dependent on the precise adjustment of the polarization state within the cavity.
1：Experimental Design and Method Selection:
The experiment utilizes a figure-eight fiber laser structure with a nonlinear-amplifying-loop-mirror (NALM) for passive mode-locking.
2：Sample Selection and Data Sources:
The setup includes a 340 m single mode fiber (SMF-28), 5 m erbium-doped fiber (EDFL-980HP), and a 976 nm laser diode.
3：List of Experimental Equipment and Materials:
Equipment includes a wavelength division multiplexer (WDM), polarization controllers (PC), isolator (ISO), fiber couplers, power meter, fast photodetector, oscilloscope, autocorrelator, RF spectrum analyzer, and optical spectrum analyzer.
4：Experimental Procedures and Operational Workflow:
The experiment involves adjusting the polarization state within the cavity to achieve different DSR states and measuring the output characteristics.
5：Data Analysis Methods:
The output power, pulse width, pulse energy, and peak power are measured and analyzed with respect to pump power and central wavelength.
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SMF-28
Providing accumulated nonlinear phase shift for propagating pulses
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EDFL-980HP
Gain spectrum covering the entire L-band
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WDM
980/1550 nm
Wavelength division multiplexer
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PC
Adjusting the polarization state of pulses
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LD
976 nm
Supplying pump power
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ISO
Ensuring unidirectional transmission of laser
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fiber coupler
10:90
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power meter
Detecting output power
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fast photodetector
In-Ga-As
Monitoring the pulse train
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oscilloscope
Monitoring the pulse train
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autocorrelator
APE-PulseCheck-USB-150
Measuring the intensity autocorrelation trace of DSR pulse
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RF spectrum analyzer
Monitoring the radio frequency (RF) spectrum
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optical spectrum analyzer
Monitoring the optical spectrum
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