Stimulated backward Raman scattering excited in the picosecond range: high efficiency conversions

Pulse Duration Compression by Two-Stage Stimulated Brillouin Scattering and Stimulated Raman Scattering

“…The SRS pulse compression technology provides a wide gain bandwidth, making it more possible to acquire picosecond pulses, and it has been reported to successfully compress pulses on the picosecond scale [19,20]. Chevalier et al achieved a high backward SRS efficiency of 40% by selecting acetone as the medium under the condition of the maximum pump energy, which was 1 mJ [21]. Despite its small compression limit, the wider application of SRS is hindered by its low energy efficiency.…”

Efficient Raman amplifier in the forward and backward directions pumped by picosecond laser pulses

“…To avoid competition from stimulated Brillouin scattering, ultrashort laser pulses have to be employed such that the pulse duration is less than the life-time of an acoustic phonon [1]. Using high-energy picosecond pulses, backscattered SRS generation has been demonstrated in a number of liquids, such as acetone, benzene and cyclohexane [2]. However, the high-energy, low-repetition-rate systems used to achieve those results are somewhat impractical for a number of applications, such as spectroscopy and remote sensing [3,4].…”