| Autor: |
Ventura A, Hayashi JG, Cimek J, Jasion G, Janicek P, Slimen FB, White N, Fu Q, Xu L, Sakr H, Wheeler NV, Richardson DJ, Poletti F |
| Jazyk: |
angličtina |
| Zdroj: |
Optics express [Opt Express] 2020 May 25; Vol. 28 (11), pp. 16542-16553. |
| DOI: |
10.1364/OE.390517 |
| Abstrakt: |
We report the first extruded tellurite antiresonant hollow core fibers (HC-ARFs) aimed at the delivery of mid-infrared (Mid-IR) laser radiation. The preform extrusion fabrication process allowed us to obtain preforms with non-touching capillaries in a single step, hence minimizing thermal cycles. The fibers were fabricated from in-house synthetized tellurite glass (containing Zn, Ba and K oxides) and co-drawn with a fluorinated ethylene propylene (FEP) polymer outer layer to improve their mechanical properties and protect the glass from humidity. The fabricated HC-ARFs transmit in the Mid-IR spectral range from 4.9 to 6 µm. We measured losses of ∼8.2, 4.8 and 6.4 dB/m at 5 µm, 5.6 µm and 5.8 µm, respectively in two different fibers. These losses, which are dominated by leakage mostly arising from a non-uniform membrane thickness, represent the lowest attenuation reported for a tellurite-based HC-ARF to date. The fibers present good beam quality and an M 2 factor of 1.2. Modelling suggests that by improving the uniformity in the capillary membrane thickness losses down to 0.05 dB/m at 5.4 µm should be possible, making this solution attractive, for example, for beam delivery from a CO laser. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
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