Open AccessParameter space for the collective laser coupling in the laser fusion driver based on the concept of fiber amplification network
Author(s) -
Zhihua Huang,
Hungyen Lin,
Ding Xu,
Mingzhong Li,
Jianjun Wang,
Ying Deng,
Rui Zhang,
Yongliang Zhang,
Xiaocheng Tian,
Xiaofeng Wei
Publication year - 2013
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.21.016494
Subject(s) - optics , fiber laser , laser beam quality , laser , coupling (piping) , amplifier , mode field diameter , physics , single mode optical fiber , inertial confinement fusion , optical fiber , materials science , polarization maintaining optical fiber , optoelectronics , fiber optic sensor , laser beams , cmos , metallurgy
Collective laser coupling of the fiber array in the inertial confinement fusion (ICF) laser driver based on the concept of fiber amplification network (FAN) is researched. The feasible parameter space is given for laser coupling of the fundamental, second and third harmonic waves by neglecting the influence of the frequency conversion on the beam quality under the assumption of beam quality factor conservation. Third harmonic laser coupling is preferred due to its lower output energy requirement from a single fiber amplifier. For coplanar fiber array, the energy requirement is around 0.4 J with an effective mode field diameter of around 500 μm while maintaining the fundamental mode operation which is more than one order of magnitude higher than what can be achieved with state-of-the-art technology. Novel waveguide structure needs to be developed to enlarge the fundamental mode size while mitigating the catastrophic self-focusing effect.