Open AccessPropagation characteristics of small-bandwidth pulsed beams with smoothing by spectral dispersion in high power laser system
Author(s) -
Lanqin Liu,
Ying Zhang,
Yaoxiang Geng,
Wenyi Wang,
Qi Zhu,
Jing Feng,
Xiaofeng Wei,
Wanqing Huang
Publication year - 2014
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.63.164201
Subject(s) - optics , bandwidth (computing) , smoothing , laser , beam divergence , laser beam quality , beam propagation method , spatial filter , spectral density , dispersion (optics) , physics , beam diameter , computer science , telecommunications , laser beams , refractive index , computer vision
In this paper, we numerically study the propagation characteristics through spatial filter and free space of small-bandwidth pulsed beams with smoothing by spectral dispersion (SSD) in high power solid-state laser system. The numerical simulation with time-, space-and spectrum-resolution is achieved by using laser propagation and amplification software developed by Research Center of the Laser Fusion. The graphs of corresponding time-, space-and spectrum-distribution are presented, and the propagation characteristics between the SSD and non-SSD beam are compared. Besides, the effects of some SSD parameters on the diffraction propagation are further discussed. The results can help to choose the proper beam divergence of SSD which matches with the size of the spatial filter hole, to design the appropriate modulation frequency and the color circle number and so on. Moreover, it could guide the design of the light path, especially the design of free space propagation of small-diameter laser.