| 研究実績の概要 |
A compact ns pulse compressor system based on stimulated Brillouin scattering (SBS) has been designed and built.
Pulse compression experiments of 18-30ns duration, 5-13mJ energy Ti:Sapphire laser pulses in 720-850nm region were performed using FC72 and FC40 SBS liquids.
Compared with the case of no intracavity etalon, the compressed pulse width decreased from 11.2ns to 7.0ns, and the efficiency improved from 42% to 55%. The short coherence length of the pump pulse (13.5 cm, bandwidth 2.23 GHz) has been identified as the main reason for low energy conversion efficiency.
To increase the efficiency, narrowband pulses (longer coherence length) must be used.
We have also built an SHG unit and investigated the SHG conversion efficiency and stability of the compressed pulses in a broader spectral region.
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