研究目的
Investigating the formation and characteristics of Q-switched noise-like pulses in a thulium-doped fiber laser.
研究成果
The study successfully demonstrated the formation of Q-switched noise-like pulses in a thulium-doped fiber laser, providing a practical method to obtain high pulse energy for noise-like pulses. The repetition rate and output power were found to increase with pump power, with intra-cavity pulse energy reaching up to 609 nJ.
研究不足
The formation of a separate Q-switched optical spectrum from the noise-like pulse was not achieved, indicating a dependency on the noise-like pulse for modulation to pulse bunching.
1：Experimental Design and Method Selection:
The experiment utilized a nonlinear polarization evolution based thulium-doped fiber laser to observe Q-switched noise-like pulse operation.
2：Sample Selection and Data Sources:
The gain medium was a thulium-doped fiber (TDF), and the pump source was a 1570-nm fiber laser.
3：List of Experimental Equipment and Materials:
Equipment included a wavelength-division multiplexer (WDM), dispersion compensation fiber (DCF), polarization controllers (PC1, PC2), a 10% output coupler (OC), and a polarization-dependent isolator (PD-ISO).
4：Experimental Procedures and Operational Workflow:
The pump power was varied from 760 mW to 1000 mW, and the polarization controllers were adjusted to observe the formation of Q-switched noise-like pulses.
5：Data Analysis Methods:
The characteristics of the pulses were analyzed using spectral analysis and autocorrelation trace measurements.
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