研究目的
Investigating the properties of a PbSe quantum dot-doped fiber ring laser operating at 1.7 μm wavelength through numerical simulation.
研究成果
The proposed PbSe QD-doped fiber ring laser at 1.7 μm wavelength shows promising results for generating continuous-wave and pulsed lasers for biomedical applications. The study provides valuable insights into optimizing cavity parameters for different applications.
研究不足
The study is based on numerical simulation, and actual experimental validation is required to confirm the findings. The pulse profiles and spectral characteristics may vary in real-world conditions due to factors not accounted for in the simulation.
1：Experimental Design and Method Selection:
A ring-structured oscillator is adopted for the simulation, using a PbSe QD-doped fiber as the gain medium pumped by a 980 nm laser diode. The slit-step method is used to solve the rate equation for exploring spectrum and time-domain characteristics.
2：Sample Selection and Data Sources:
PbSe QDs with a 5.5 nm diameter are employed, with their absorption-emission cross-section relationship obtained from previous measurements.
3：5 nm diameter are employed, with their absorption-emission cross-section relationship obtained from previous measurements.
List of Experimental Equipment and Materials:
3. List of Experimental Equipment and Materials: A 980 nm laser diode, fiber-pigtailed wavelength division multiplexer, 1 × 2 fiber coupler, fiber filter with a 3 dB bandwidth of 10 nm at 1.7 μm, and single-mode fiber with an 8.5 μm core diameter.
4：7 μm, and single-mode fiber with an 5 μm core diameter.
Experimental Procedures and Operational Workflow:
4. Experimental Procedures and Operational Workflow: The output laser power is adjusted by varying the coupling ratio of the output coupler and the doping concentration of the QDF. Temporal and spectral characteristics are researched under different simulation parameters.
5：Data Analysis Methods:
The relationship between laser peak power and pump power is investigated, and pulse duration is calculated.
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