## 1 Introduction  
Supercontinuum (SC) generation is a nonlinear phenomenon characterized by dramatic spectral broadening of intense light pulses passing through a nonlinear material due to the combined effects of chromatic dispersion and various nonlinear processes [1]. SC light sources possess numerous advantages, including a large bandwidth, brightness, high coherence, and a multi-octave-spanning spectrum. Consequently, they have achieved remarkable success in scientific research and find applications in various fields, such as national defense security [2], biomedicine [3], fluorescence imaging [4], and spectroscopy [5]. The mid-infrared SC has drawn much attention in recent years because it covers two important atmospheric windows at 3 \(\upmu\)m to 5 \(\upmu\)m and 8 \(\upmu\)m to 12 \(\upmu\)m where most molecules display fundamental vibrational absorption, leaving distinctive spectral fingerprints [6]. MIR fiber laser source host materials primarily include fluoride, heavy metal oxides, and chalcogenide (CHG) glasses. For example, [PERSON] et al. [7] reported octave-spanning SC generation from 1.2 \(\upmu\)m to 2.5 \(\upmu\)m with 600 mW average power in a short length of a multimode fluoride fiber with a 100 \(\upmu\)m core diameter due to the main contribution of higher-order modes. [PERSON] et al. [8] achieved all-normal dispersion (ANDi) of a lead-bismuth-gallate glass solid-core photonic crystal fiber (PCF) and SC generation in the wavelength range of 0.9 \(\upmu\)m to 2.5 \(\upmu\)m pumped using low peak power. [PERSON] et al. [9] reported the design and fabrication of an ultra-high birefringence up to 10\({}^{-2}\) polarization-maintaining As\({}_{38}\)Se\({}_{62}\) tapered PCF with 3 rings of air holes in the cladding and experimentally generated MIR SC from 3.1 \(\upmu\)m to 6.02 \(\upmu\)m. Recently, the use of non-glass fibers in MIR SC generation has attracted much interest. [PERSON] et al. [10] achieved a 4.3-octave-wide spectrum from 0.2 \(\upmu\)m to 4 \(\upmu\)m in a gas-filled hollow-core antiresonant fiber that consists of a hollow core surrounded by seven non-touching silica capillaries with a wall thickness of \(\sim\)0.64 \(\upmu\)m, forming a core with a diameter of \(\sim\)44 \(\upmu\)m. [PERSON] et al. [11] demonstrated that it was possible to optimize the dispersion characteristics of the CHG fibers for SC generation by filling the selected liquids into cladding air holes and studied the tapered fibers for broad SC generation. SC generation from selective filling of MOFs has been experimentally demonstrated using water [12], carbon tetrachloride [13], and toluene [14]. It can improve the nonlinearity and optimize the dispersion characteristics of fibers generated using this method, which provides an alternative approach to the study of broadband SC generation. CHG glasses have numerous desirable and promising optical properties, such as a high value of nonlinear refractive index, high damage threshold, low phonon energy, and excellent crystalline quality, making them excellent candidates for MIR SC generation [15]. Arsenic-containing glasses are the most used host materials in CHG fibers, and numerous studies have been conducted on improving the spectral width, coherence, and engineering of optical fiber waveguides. For example, [PERSON] et al. [16] experimentally demonstrated SC spanning from \(\sim\)2.0 \(\upmu\)m to 15.1 \(\upmu\)m using a 3 cm long CHG step-index fiber (SIF) by pumping it at 9.8 \(\upmu\)m with a peak power of \(\sim\)2.89 MW. [PERSON] et al. [17] reported a three-hole suspended-core fiber (SCF) that used AsSe\({}_{2}\) as background material. The proposed SCF obtained a zero dispersion wavelength (ZDW) at 2.55 \(\upmu\)m, and a broadband SC extending from 1 \(\upmu\)m to 14 \(\upmu\)m was achieved by pumping 10 kW peak power and 50 fs duration laser pulses at 2.56 \(\upmu\)m. [PERSON] et al.