研究目的
To develop a mode-locked fiber laser using ZnO nanoparticles as a saturable absorber in the near infrared range.
研究成果
The study successfully demonstrated a mode-locked fiber laser operating at 1064 nm using ZnO nanoparticles as a saturable absorber. The laser produced stable optical pulses with less than 1-ns pulse-width, verified through Fourier transform analysis. This represents the first successful demonstration of such a laser utilizing ZnO nanoparticles in this capacity.
研究不足
The study was limited by the resolution of the measurement equipment, which capped the detectable pulse-width at less than 1 ns. Additionally, the interaction between the ZnO nanoparticles and the laser beam's evanescent field, while beneficial for stability, may limit the absorption efficiency.
1：Experimental Design and Method Selection:
The study utilized a sol-gel method to fabricate ZnO nanoparticles on a D-shape side-polished fiber for use as a saturable absorber in a mode-locked fiber laser.
2：Sample Selection and Data Sources:
ZnO nanoparticles were prepared and deposited on a glass substrate and a D-shape side-polished fiber. The absorption characteristics were measured using a broadband weak light and a 1064-nm diode laser.
3：List of Experimental Equipment and Materials:
Equipment included a 980 nm laser diode pump, wavelength division multiplexers, a polarization controller, a coupler, a bandpass filter, an isolator, and an Yb-doped fiber. Materials included zinc acetate, monoethanolamine, and ethylene glycol monomethyl ether.
4：Experimental Procedures and Operational Workflow:
The ZnO nanoparticles were deposited on the fiber, and the mode-locked fiber laser was constructed in a ring-cavity form. The laser's performance was characterized through optical spectrum analysis and pulse measurement.
5：Data Analysis Methods:
The mode-locking was verified through Fourier transform analysis of the laser's output pulses.
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