Work

Hysteresis in an erbium doped ZBLAN waveguide GHz mode-locked laser

Year: 2025

Type: article

Abstract: We report the experimental observation and numerical analysis of a new type of hysteresis behaviour in a passively mode-locked erbium-doped ZBLAN chip waveguide laser. By tuning the spectral transmission window through translating a collimation lens, or changing the net intracavity dispersion, we observe bistable pulse characteristics and different abrupt spectral transitions depending on the translation direction of the collimation lens. A hysteresis behaviour is observed in pulse width and spectral bandwidth, which is persistent in the single-pulse operation regime and is strongly dependent on the sign and magnitude of the intracavity dispersion. A numerical model is developed to investigate this phenomenon, which successfully confirms the experimental hysteresis behaviour. Further analysis reveals that the phenomenon arises from the interplay between dispersion-induced chirp and delayed absorption recovery of the SESAM.

Source: Optics Express

DOI: 10.1364/oe.578159

Authors: Wen Qi Zhang, Shahraam Afshar Vahid, Dale E. Otten, David G. Lancaster

Language: English

Topic: Advanced Fiber Laser Technologies

Subfield: Atomic and Molecular Physics, and Optics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $2,270

Funder: Australian Research Council

Award: ARC Centre of Excellence in Optical Microcombs for Breakthrough Science