Journal
JOURNAL OF LIGHTWAVE TECHNOLOGY
Volume 39, Issue 7, Pages 2158-2163Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/JLT.2020.3045814
Keywords
Glass; Optical fiber dispersion; Optical fibers; Optical fiber sensors; Optical fiber amplifiers; Chalcogenides; Dispersion; Chalcogenide glass fiber; double-cladding structure; large numerical aperture; supercontinuum generation
Funding
- Natural Science Foundation of China [61705091, 61875097, 61627815, 61775109]
- Zhejiang Provincial Natural Science Foundation of China [LR18F050002, LY20F050010]
- Ten-Thousands Talents Program of Zhejiang Province
- Leading and top-notch personnel training project of Ningbo
- 3315 Innovation Team in Ningbo City
- K. C. Wong Magna Fund in Ningbo University, China
- RD Program-mer [2016YFB030800]
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In this study, a novel chalcogenide fiber with high numerical aperture and W-type double-cladding structure was successfully prepared, demonstrating great potentials in the field of high power laser delivery, high efficiency imaging, and high-capacity signal transmission in the mid-infrared spectrum.
We have prepared a novel fiber consisting of three different glasses with W-type double-cladding structure and constant core-to-cladding ratio by the extrusion method. An ultra-high numerical aperture (NA >= 2.17) indicates that this fiber has a good capability of collecting and confining light in a wide wavelength range. The lowest fiber loss is approximately 1.7 dB/m at 6.1 mu m. Supercontinuum spectrum covering 1.6 mu m to 10.85 mu m at a bandwidth of -30 dB has been demonstrated in a 21 cm long fiber pumped by 5 mu m laser. This chalcogenide fiber has high-NA and W-type double-cladding structure, and thus shows great potentials in the field of high power laser delivery, high efficiency imaging and high-capacity signal transmission in the mid-infrared.
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