研究目的
To explore the nonlinear optical applications of Y2O3 as saturable absorbers (SAs) in fiber lasers and demonstrate a passively Q-switched near-infrared fiber laser using Y2O3 as a Q-switching device.
研究成果
The study demonstrated an erbium-doped QSFL using Y2O3 as the Q-switched device to deliver nanosecond pulses. The generated stable Q-switched pulses have a controlled repetition rate of 112–217 kHz, pulse duration of 593 ns, output power of 26 mW, and pulse energy of 120 nJ. The Y2O3 SA may make inroads into the potential market of optical modulation and optoelectronic devices.
研究不足
The study did not achieve mode-locking due to the nonlinearity and anomalous dispersion not reaching equilibrium in this case. The maximum damage threshold of the Y2O3 SA is ~68 mJ/cm2.
1：Experimental Design and Method Selection:
The study employed the magnetron sputtering method to prepare the Y2O3 SA and used the twin-detector measurement technique to measure its optical nonlinear properties.
2：Sample Selection and Data Sources:
The Y2O3 SA was prepared on a tapered optical fiber with a waist diameter of 14 μm and effective fused zone length of
3：8 cm. List of Experimental Equipment and Materials:
The experiment used a commercially purchased Y2O3 target with
4：99% purity, a vacuum pump, and a magnetron sputtering deposition system. Experimental Procedures and Operational Workflow:
The Y2O3 particles were uniformly deposited on the outer wall of the optical fiber, which was rotated evenly at a speed of 10 rpm. The flow rate of Ar was 20 sccm during the sputtering process.
5：Data Analysis Methods:
The nonlinear absorption characteristics of the Y2O3 SA were analyzed using the twin-detector measurement technique.
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