We present coherent beam combining of nanosecond pulses with 20-J energy and large beams using a Sagnac interferometer geometry based on Nd:glass rod-type amplifiers.In this study,we demonstrate that coherent beam com...We present coherent beam combining of nanosecond pulses with 20-J energy and large beams using a Sagnac interferometer geometry based on Nd:glass rod-type amplifiers.In this study,we demonstrate that coherent beam combining is compatible with large-diameter energetic beams,presenting,therefore,an interesting and solid perspective towards the performance improvement of large-scale laser facilities,especially in terms of high-repetition-rate and highenergy operation.We demonstrate that for energy of 20 J,the coherent combination efficiency is around 92%,with high beam quality and long-term stability.A thorough temporal and spatial characterization of the system's operation is provided to forecast the various potentialities available for large-scale facilities.展开更多
基金funding from the European Union’s HORIZON-INFRA-2022-TECH-01 call under grant agreement number 101095207funded by the‘SESAME filières PIA’call for projects from Bpifrance for the‘CRONOS’project,contract numbers DOS0153845/00 and DOS0153842/00。
文摘We present coherent beam combining of nanosecond pulses with 20-J energy and large beams using a Sagnac interferometer geometry based on Nd:glass rod-type amplifiers.In this study,we demonstrate that coherent beam combining is compatible with large-diameter energetic beams,presenting,therefore,an interesting and solid perspective towards the performance improvement of large-scale laser facilities,especially in terms of high-repetition-rate and highenergy operation.We demonstrate that for energy of 20 J,the coherent combination efficiency is around 92%,with high beam quality and long-term stability.A thorough temporal and spatial characterization of the system's operation is provided to forecast the various potentialities available for large-scale facilities.
