研究目的
To demonstrate a high repetition rate, high energy chirped pulse amplification (CPA) system based on single crystal fiber (SCF) amplifier.
研究成果
An output power of 61.8 W at 200 kHz pulse repetition rate has been obtained, which is the highest power based on SCF at hundreds of kHz repetition rate. The system shows promising prospects in industrial processing and scientific research.
研究不足
The power drops from 67.9 W to 63 W in the first 16 min due to wavelength drifting of the pump power and thermal instability in the amplifier. The beam quality deteriorates as the output power increases due to thermal-optical effect.