In this review paper, we introduce a self-phase controlled stimulated Brillouin scattering phase conjugate mirror(SCSBS-PCM) and the Kumgang laser. The SC-SBS-PCM was proposed and demonstrated its success at the acade...In this review paper, we introduce a self-phase controlled stimulated Brillouin scattering phase conjugate mirror(SCSBS-PCM) and the Kumgang laser. The SC-SBS-PCM was proposed and demonstrated its success at the academic low power level, ~100 mJ@10 Hz. The Kumgang laser is under development to verify whether the SC-SBS-PCM is operable at the k W level. It is a 4 kW beam combination laser combining four 1 k W beams using the SC-SBS-PCM. If the Kumgang laser functions successfully, it will be the most important step towards a Dream laser, a hypothetical laser with unlimited power and a high repetition rate.展开更多
Thermal effects are typically considered as obstacles to high-repetition-rate stimulated Brillouin scattering(SBS)pulse compression.In this paper,a novel method is proposed for improving the SBS output characteristics...Thermal effects are typically considered as obstacles to high-repetition-rate stimulated Brillouin scattering(SBS)pulse compression.In this paper,a novel method is proposed for improving the SBS output characteristics by exploiting thermal effects on the liquid medium.Using HT270,the SBS output parameters with the medium purification and rotating off-centered lens methods are studied at different repetition rates.The results indicate that these two methods can alleviate thermal effects and improve the energy efficiency,but the rotating method reduces the energy stability because of the aggravated optical breakdown at the kilohertz-level repetition rate.For a 35-mJ pump energy,the energy efficiency at 2 kHz without the rotating method is 30%higher than that at 100 Hz and 70%higher than that at 500 Hz.The enhancement of the SBS output characteristics by thermal effects is demonstrated theoretically and experimentally,and 2-kHz high-power SBS pulsecompression is achieved with HT270.展开更多
基金supported by the ‘Dual Use Technology Program’ at the Agency for Defense Development (ADD) of the Republic of Korea (UM12012RD1)
文摘In this review paper, we introduce a self-phase controlled stimulated Brillouin scattering phase conjugate mirror(SCSBS-PCM) and the Kumgang laser. The SC-SBS-PCM was proposed and demonstrated its success at the academic low power level, ~100 mJ@10 Hz. The Kumgang laser is under development to verify whether the SC-SBS-PCM is operable at the k W level. It is a 4 kW beam combination laser combining four 1 k W beams using the SC-SBS-PCM. If the Kumgang laser functions successfully, it will be the most important step towards a Dream laser, a hypothetical laser with unlimited power and a high repetition rate.
基金the National Natural Science Foundation of China(No.62105303)the Shanxi Scholarship Council of China(No.2020-102)+2 种基金the Fundamental Research Program of Shanxi Province(No.20210302124026)the Scientific and Technological Innovation Programs in Shanxi(No.2020L0265)the 2021 China-Korea Young Scientist Exchange Program.
文摘Thermal effects are typically considered as obstacles to high-repetition-rate stimulated Brillouin scattering(SBS)pulse compression.In this paper,a novel method is proposed for improving the SBS output characteristics by exploiting thermal effects on the liquid medium.Using HT270,the SBS output parameters with the medium purification and rotating off-centered lens methods are studied at different repetition rates.The results indicate that these two methods can alleviate thermal effects and improve the energy efficiency,but the rotating method reduces the energy stability because of the aggravated optical breakdown at the kilohertz-level repetition rate.For a 35-mJ pump energy,the energy efficiency at 2 kHz without the rotating method is 30%higher than that at 100 Hz and 70%higher than that at 500 Hz.The enhancement of the SBS output characteristics by thermal effects is demonstrated theoretically and experimentally,and 2-kHz high-power SBS pulsecompression is achieved with HT270.
