1：Experimental Design and Method Selection:

The study involved the fabrication of a Sm2O3 thin film SA by mixing Sm2O3 powder with PVA solution, drying it to form a thin film, and incorporating it into a TDFL ring cavity for Q-switched pulse generation.

2：Sample Selection and Data Sources:

The Sm2O3 powder and PVA solution were used to prepare the SA. The TDFL was pumped by a 1550 nm Erbium-Ytterbium-doped fiber laser.

3：List of Experimental Equipment and Materials:

Equipment included optical spectrum analyzer, digital oscilloscope, radio frequency spectrum analyzer, digital power meter, and photodetector. Materials included Sm2O3 powder, PVA, Thulium-doped fiber, and FC/PC fiber ferrules.

4：Experimental Procedures and Operational Workflow:

The Sm2O3 PVA solution was prepared, dried to form a thin film, and then integrated into the TDFL cavity. The laser's performance was analyzed at various pump powers.

5：Data Analysis Methods:

The output power, pulse energy, repetition rate, and pulse width were measured and analyzed to evaluate the laser's performance.