研究目的
To reduce the thermal lens effect and increase the efficiency in a passively Q-switched YVO4-based Raman laser system using a composite crystal of Nd3+:YAG/Cr4+:YAG/YAG and a coupled cavity structure.
研究成果
The use of a composite crystal and coupled cavity structure significantly improved the performance of the PQS Raman laser system, especially at high pump powers. The maximum output power achieved was 0.92 W at 1176 nm with an optical-to-optical efficiency of 11.51%. The study demonstrated the importance of thermal management and cavity design in enhancing laser performance.
研究不足
The study focused on the thermal effects and efficiency improvements in a specific laser system configuration. Potential areas for optimization include further reducing thermal lens effects and exploring other saturable absorbers or cavity designs.
1：Experimental Design and Method Selection:
The study employed a composite crystal of Nd3+:YAG/Cr4+:YAG/YAG and a coupled cavity structure to reduce thermal lens effect and increase efficiency. Theoretical models and finite element method were used for simulation.
2：Sample Selection and Data Sources:
The composite crystal dimensions and properties were specified, including the use of a fiber-coupled laser diode as the pump source.
3：List of Experimental Equipment and Materials:
Included a fiber-coupled laser diode, lenses, composite crystal, Raman-active crystal YVO4, and various mirrors with specific coatings.
4：Experimental Procedures and Operational Workflow:
Detailed the setup for PQS fundamental and Raman lasers, including cavity lengths and mirror configurations.
5：Data Analysis Methods:
Utilized finite element method for thermal analysis and calculated intracavity photon lifetime to evaluate losses.
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