Abstract
Dynamical thermo-optic instabilities in asymmetric dual-core fiber amplifiers are investigated by numerical simulations. A coupled-mode model capable of describing the asymmetric dual-core structure is derived, and structures with various levels of refractive-index asymmetry from 10−6 to 10−4 are studied. The most viable route to avoid thermally induced power signal field fluctuations is found to be core decoupling via large separation and strong refractive-index asymmetry. A design criterion for this strategy to be effective is suggested based on the numerical results.
Original language | English |
---|---|
Journal | Journal of the Optical Society of America B: Optical Physics |
Volume | 37 |
Issue number | 5 |
Pages (from-to) | 1494-1501 |
ISSN | 0740-3224 |
DOIs | |
Publication status | Published - 1 May 2020 |