Exploiting spacetime symmetry in dissipative nonlinear multimode amplifiers for output control
Optics
2024-02-19 v1
Abstract
Time-reversal symmetry enables shaping input waves to control output waves in many linear and nonlinear systems; however energy dissipation violates such symmetry. We consider a saturated multimode fiber amplifier in which light generates heat flow and suffers nonlinear thermo-optical scattering, breaking time-reversal symmetry. We identify a spacetime symmetry which maps the target output back to an input field. This mapping employs phase conjugation, gain and absorption substitution but not time reversal, and holds in steady-state and for slowly varying inputs. Our results open the possibility of output control of a saturated multimode fiber amplifier.
Cite
@article{arxiv.2402.10345,
title = {Exploiting spacetime symmetry in dissipative nonlinear multimode amplifiers for output control},
author = {Chun-Wei Chen and Kabish Wisal and Mathias Fink and A. Douglas Stone and Hui Cao},
journal= {arXiv preprint arXiv:2402.10345},
year = {2024}
}