TY - JOUR
T1 - Towards ultimate high-power scaling
T2 - Coherent beam combining of fiber lasers
AU - Fathi, Hossein
AU - Närhi, Mikko
AU - Gumenyuk, Regina
N1 - Funding Information:
Funding: This work was supported by: (i) the PULSE project, grant agreement number 824996, funded by the European Commission Horizon 2020 Program, (ii) Finnish Cultural Foundation, grant number: 00210294, and (iii) Finnish National Agency for Education (EDUFI) Fellowship 2020, grant number: TM-20-11453.
Publisher Copyright:
© 2021 by the authors. Licensee MDPI, Basel, Switzerland.
PY - 2021/12
Y1 - 2021/12
N2 - Fiber laser technology has been demonstrated as a versatile and reliable approach to laser source manufacturing with a wide range of applicability in various fields ranging from science to industry. The power/energy scaling of single-fiber laser systems has faced several fundamental limitations. To overcome them and to boost the power/energy level even further, combining the output powers of multiple lasers has become the primary approach. Among various combining techniques, the coherent beam combining of fiber amplification channels is the most promising approach, instrumenting ultra-high-power/energy lasers with near-diffraction-limited beam quality. This paper provides a comprehensive review of the progress of coherent beam combining for both continuous-wave and ultrafast fiber lasers. The concept of coherent beam combining from basic notions to specific details of methods, requirements, and challenges is discussed, along with reporting some practical architectures for both continuous and ultrafast fiber lasers.
AB - Fiber laser technology has been demonstrated as a versatile and reliable approach to laser source manufacturing with a wide range of applicability in various fields ranging from science to industry. The power/energy scaling of single-fiber laser systems has faced several fundamental limitations. To overcome them and to boost the power/energy level even further, combining the output powers of multiple lasers has become the primary approach. Among various combining techniques, the coherent beam combining of fiber amplification channels is the most promising approach, instrumenting ultra-high-power/energy lasers with near-diffraction-limited beam quality. This paper provides a comprehensive review of the progress of coherent beam combining for both continuous-wave and ultrafast fiber lasers. The concept of coherent beam combining from basic notions to specific details of methods, requirements, and challenges is discussed, along with reporting some practical architectures for both continuous and ultrafast fiber lasers.
KW - Coherent beam combining
KW - Continuous wave
KW - Fiber lasers and amplifiers
KW - Power scaling
KW - Pulsed lasers
U2 - 10.3390/photonics8120566
DO - 10.3390/photonics8120566
M3 - Review Article
AN - SCOPUS:85121709401
SN - 2304-6732
VL - 8
JO - Photonics
JF - Photonics
IS - 12
M1 - 566
ER -