研究目的
To report a high-repetition-rate single-frequency injection-seeded Q-switched Er:YAG laser with a ‘double reflection’ architecture for use in wind Lidar systems.
研究成果
A stable 2 kHz single-frequency Q-switched Er:YAG laser with a maximum output energy of 4.2 mJ and a pulse width of 417.9 ns was achieved. The novel ‘double-reflection’ architecture enabled stable high-repetition-rate single-frequency operation, making it a potential candidate for Doppler wind Lidar systems.
研究不足
The study does not discuss the long-term stability of the laser system or its performance under varying environmental conditions.
1：Experimental Design and Method Selection:
The study employs a ‘double-reflection’ architecture and ‘ramp-fire’ injection-seeding technique to achieve stable high-repetition-rate single-frequency operation.
2：Sample Selection and Data Sources:
A 60 mm Er:YAG crystal with an Er-doping concentration of
3：25 at.% is used as the gain medium. List of Experimental Equipment and Materials:
Includes a CW single-frequency Er:YAG NPRO laser, an acousto-optic modulator (AOM), a 1532 nm fiber laser, and various mirrors and lenses.
4：Experimental Procedures and Operational Workflow:
The seed laser is injected into the slave cavity through the first diffraction order of the AOM, with mode matching achieved using a plano-convex lens.
5：Data Analysis Methods:
The heterodyne beating technique is used to measure the pulse spectrum, and the success rate of injection-seeding is analyzed.
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