研究目的
Investigating the effectiveness of a high power pulse laser reflection sequence combination with a fast steering mirror (FSM) for achieving high combining efficiency and excellent pointing stability.
研究成果
The proposed high power pulse laser reflection sequence combination with an FSM achieves a high combining efficiency of 98.6% and excellent pointing stability with rms pointing jitter ～8.5 μrad, demonstrating its potential for scaling higher output power with good beam quality.
研究不足
The beam quality of the combined pulse is slightly degraded compared to the individual beamlets, and the pointing jitter is affected by the vibration of the combining device and air turbulence.
1：Experimental Design and Method Selection:
The experiment involves combining two high power pulsed beams using a fast steering mirror (FSM) to achieve sequential coaxial combination of laser pulses.
2：Sample Selection and Data Sources:
Two homemade Nd:YAG pulsed laser oscillators at 1064 nm with spectral width of
3：15 nm, operating at a repetition rate of 80 Hz with pulse width of 500 μs are used. List of Experimental Equipment and Materials:
The setup includes a signal generator (Keysight 33600A), a synchronizing device, piezoelectric (PZT) actuators, a quartz mirror, a flexure support system, and a servo control system.
4：Experimental Procedures and Operational Workflow:
The FSM is synchronized with the pulsed lasers to reflect beamlets at different states, ensuring their optical paths overlap.
5：Data Analysis Methods:
The combined beam's power, beam quality, and pointing stability are measured using a power meter, CCD camera, and oscilloscope.
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