Mode-locked near-infrared thulium doped fibre laser using evanescent field effect with Bi2O3 saturable absorber
Document Type
Article
Publication Date
1-1-2019
Abstract
Using the evanescent field effect, a high power passively mode-locked laser with a pulse duration of 1.85 ps and the pulse energy of 13.15 pJ is demonstrated. A Bi2O3 solution is used as a saturable absorber (SA) on a side polished fibre incorporated into a thulium doped fibre laser cavity for operation in the mid-infrared range. The 37.61% SA has a modulation depth and creates a highly stable mode-locked pulse output with a short pulse duration. The calculated net cavity dispersion at central wavelength is -1.4 ps2, indicating operation is in the anomalous dispersion regime and confirmed by the presence of Kelly's side-bands observed in the generated optical spectrum. Radio frequency analysis reveals a high signal to noise ratio, making this laser stable for use in telecommunication systems. © 2019 Astro Ltd.
Keywords
Bi2O3 saturable absorber, evanescent field effect, thulium doped fibre laser
Divisions
photonics
Publication Title
Laser Physics
Volume
29
Issue
5
Publisher
IOP Publishing