Year: 2025
Type: conference-abstract
Abstract: We propose an all-optical spatial non-Hermitian mode-cleaning scheme for parabolic waveguides and nonlinear fiber amplifiers supported by analytical and numerical studies. The effect is triggered by a unidirectional coupling among the modes, resulting from the simultaneous modulation of the refractive index and gain/loss along graded-index multimode waveguides. Moreover, the proposal also enables mode conversion, and in the case of amplifiers, the antisymmetric non-Hermitian potential allows for a flexible modal management.
DOI: 10.1117/12.3062578
Institution: Universitat Politècnica de Catalunya
Language: English
Subfield: Atomic and Molecular Physics, and Optics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
Awards: G6529136777, G8920660035
OpenAlex ID: W4411082251