Ultrabroadband and coherent mid-infrared supercontinuum generation in all-normal dispersion Te-based chalcogenide all-solid microstructured fiber

Abstract

We report an ultrabroadband supercontinuum (SC) generation with high coherence property in all-normal-dispersion (ANDi) Te-based chalcogenide all-solid microstructured optical fiber (AS-MOF). The fiber was fabricated using a rod-in-tube method that presents four A s 2 S 3 glass rods selected as low refractive index material ( n = 2.4 ) embedded in a G e 20 A s 20 S e 20 T e 40 glass matrix ( n = 3.1 ). The highly symmetrical four-hole MOF preform was fabricated through the computerized numerical control precision mechanical drilling method. By engineering the structure of the fiber, we determined an ANDi characteristic in the range of 2–13.5 µm when the core diameter of the fiber was ≤ 10 µ m . Under pumping at 5 µm, a highly coherent SC generation in the range of 2–13.2 µm was generated in a 16-cm-long AS-MOF with core diameter of 9.8 µm.

Mid-infrared supercontinuum generation in chalcogenide glass fibers: a brief review

“…As can be seen in Fig. 17a and b, when the fiber core diameter is less than 20 μm, it even tends to exhibit no ZDW property [93,94]. Figure 17c is an SC source spanning from 2 to 14 μm generated from a Ge 20 As 20 Se 15 Te 45 fiber with all-normal dispersion, showing a high coherence in all wavelengths and a flatness in 2.9-13.1 μm within − 10 dB dynamic range.…”

Recent advances in supercontinuum generation in specialty optical fibers [Invited]

“…Enabled by the high nonlinearity and transparency of chalcogenide glasses, the spectral coverage of ANDi SC sources has been extended far into the mid-IR to wavelengths up to 14 µm, e.g. using step-index, tapered or all-solid PCF designs [140][141][142][143]. Where available, details of experimental RIN measurements are also listed, such as total bandwidth over which RIN was investigated, measurement method and spectral filter bandwidth [124,129,134,135,138].…”

Recent Advances in Supercontinuum Generation in Specialty Fiber

“…Enabled by the high nonlinearity and transparency of chalcogenide glasses, the spectral coverage of ANDi SC sources has been extended far into the mid-IR to wavelengths up to 14 µm, e.g. using step-index, tapered or all-solid PCF designs [131][132][133][134]. Where available, details of experimental RIN measurements are also listed, such as total bandwidth over which RIN was investigated, measurement method and spectral filter bandwidth [112,116,121,126,129].…”