Pengfei LI, Zuncheng ZHAO, Wei LU, Desheng HONG, Peirong CHEN, Chuanbiao ZHANG, Xiaoguang TIAN, Chang LIU, Cong CHEN. High Contrast Femtosecond Laser Regenerative Amplifier Based on Dual-channel Pre-pulse Cleaning and Intracavity Spectral Filtering[J]. Acta Photonica Sinica, 2022, 51(11): 1114003
- Acta Photonica Sinica
- Vol. 51, Issue 11, 1114003 (2022)
Fig. 1. Optical path design of regenerative amplifier
Fig. 2. Output spectrum curve of oscillator
Fig. 3. Transmission curve of SSF［24］
Fig. 4. Schematic diagram of dual-channel pulse cleaning device
Fig. 5. When SSF is added to the cavity，the energy stability of the pump pulse and the energy stability of the amplified light after passing through the dual-channel pre-pulse cleaning device
Fig. 6. Pre-pulse intensity curve before and after passing through the dual-channel pre-pulse cleaning device
Fig. 7. When SSF is added to the cavity，the final spectrum curve and spectrum phase of amplification and interference autocorrelation trace of the pulses after the compressor
Fig. 8. When the SSF is placed in the amplifier cavity，the track of the third-order autocorrelation
Fig. 9. When SSF is applied outside the cavity，the final spectrum curve and spectrum phase of amplification and interference autocorrelation trace of the pulses after the compressor
Fig. 10. Pulse energy stability of amplified light after passing through dual-channel pre-pulse cleaning device when SSF is applied outside the cavity
Fig. 11. When the SSF is placed inside and outside the amplifier cavity，the trajectory of third-order autocorrelation
Fig. 12. The actual transmission curve of the SSF and the spectrum of the ASE in the ring cavity without SSF
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