Frequency-resolved spatial beam mapping in multimode fibers: application to mid-infrared supercontinuum generation
Year: 2021
Type: article
Abstract: We present a new, to the best of our knowledge, spatial-spectral mapping technique permitting measurement of the beam intensity at the output of a graded-index multimode fiber (GIMF) with sub-nanometric spectral resolution. We apply this method to visualize the fine structure of the beam shape of a sideband generated at 1870 nm by geometric parametric instability (GPI) in a GIMF. After spatial-spectral characterization, we amplify the GPI sideband with a thulium-doped fiber amplifier to obtain a microjoule-scale picosecond pump whose spectrum is finally broadened in a segment of I n F 3 optical fiber to achieve a supercontinuum ranging from 1.7 up to 3.4 µm.
Source: Optics Letters
DOI: 10.1364/ol.428623
Language: English
Subfield: Electrical and Electronic Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: green
Awards: Broadband mid-Infrared SuperCOnTinuum sources, G2156730548, G2189472788, International Mobility and Training in Photonics Programme, G2945612233, G3455407915, G3645878137, G4656594441, G5389102025, G7240591288, G7240651115, G7376787254, From specific ceramic materials and components to integrated, secured and intelligent communication systems, ISITE « BFC, G8180413572, elecTRo-optically Actuated all-FIber Components for advanced endoscopic system
OpenAlex ID: W3173324670