TY - JOUR
T1 - Stable control of the fiber laser phased array under long-range turbulent atmosphere
AU - Huang, Guan
AU - Lv, Guoyun
AU - Fan, Yangyu
AU - Geng, Chao
AU - Li, Xinyang
N1 - Publisher Copyright:
© 2021 Elsevier Ltd
PY - 2022/2
Y1 - 2022/2
N2 - Fiber laser phased array (FLPA) plays an important role in the laser projection applications, such as free-space optical communication and directed energy. However, the turbulence suppression effect of FLPA is severely limited in the long-range atmospheric environment. In this paper, the basic principle of FLPA is introduced, and the practical challenges are analyzed in detail. To improve the performance of FLPA, a gradient estimator based on the lock-in amplifier (LIA-ES) is introduced. Experiments based on two-channel FLPA were conducted in the free space with the beam's propagation distance of 40 m, and the results showed that when the LIA-ES was employed, the energy transfer efficiency of FLPA was improved by 2.22%, and the stability was improved by 25.9%. In addition, when an equivalent beam's propagation distance of 30 km was introduced, the LIA-ES can improve the energy transfer efficiency by 62.7%, and improve the stability by 75.9%.
AB - Fiber laser phased array (FLPA) plays an important role in the laser projection applications, such as free-space optical communication and directed energy. However, the turbulence suppression effect of FLPA is severely limited in the long-range atmospheric environment. In this paper, the basic principle of FLPA is introduced, and the practical challenges are analyzed in detail. To improve the performance of FLPA, a gradient estimator based on the lock-in amplifier (LIA-ES) is introduced. Experiments based on two-channel FLPA were conducted in the free space with the beam's propagation distance of 40 m, and the results showed that when the LIA-ES was employed, the energy transfer efficiency of FLPA was improved by 2.22%, and the stability was improved by 25.9%. In addition, when an equivalent beam's propagation distance of 30 km was introduced, the LIA-ES can improve the energy transfer efficiency by 62.7%, and improve the stability by 75.9%.
KW - Atmospheric turbulence
KW - Fiber laser phased array
KW - Lock-in amplifier
KW - Optimization algorithm
UR - http://www.scopus.com/inward/record.url?scp=85115359500&partnerID=8YFLogxK
U2 - 10.1016/j.optlastec.2021.107528
DO - 10.1016/j.optlastec.2021.107528
M3 - 文章
AN - SCOPUS:85115359500
SN - 0030-3992
VL - 146
JO - Optics and Laser Technology
JF - Optics and Laser Technology
M1 - 107528
ER -