Mid-Infrared Ultraflat Broadband Supercontinuum Generation with 10 dB Bandwidth of 2340 nm in a Tapered Fluorotellurite Fiber

• DOI: 10.3390/photonics12040297
• Publication Date: 2025-03-24T11:46:50Z
• Authors: Guochuan Ren; Linjing Yang; Chuanfei Yao; Xuan Wang; Luyao Pu; Kaihang Li; Ling Zhang; Pingxue Li
• Keywords: Supercontinuum

We demonstrate mid-infrared ultraflat broadband supercontinuum (SC) generation in a 40 cm long tapered fluorotellurite fiber pumped by Raman soliton source. By tapering the end of large-core-diameter fiber, dispersion is regulated and nonlinear effect enhanced, which effectively extends SC spectral range increases flatness. Finally, we obtained an light source with from 1.8 to 4.7 μm; 10 dB bandwidth completely covers 1.88–4.22 μm, has farthest flat edge fibers. The output power laser about 1.04 W, ratio those above 3 μm spectrum total ~24%. optical-to-optical conversion efficiency 75%. Our results show that effective method further extend flatten SC.