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Dr. Walter Belardi
Université de Lille, CNRS, UMR 8523 –PhLAM – Physique des Lasers Atomes et Molécules, F-59000 Lille, France

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Research Keywords & Expertise

0 microstructured optical fibers
0 optical fiber communication
0 optical fiber devices
0 optical fiber sensing
0 Gas Lasers

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Journal article
Published: 21 August 2019 in Optics Letters
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Hollow core optical fibers are normally passive light transport components. In contrast, within this Letter, we numerically investigate the possibility of using them as optical amplifiers, through the adoption of a novel fiber structure. We show that optical amplification can be achieved in hollow core fibers, where the cladding region is partially doped and composed of both resonant and anti-resonant elements. A balance between loss and glass/optical mode overlap is obtained, which allows efficient amplification over a limited spectral bandwidth. We discuss the case of a thulium-doped optical amplifier based on this novel technological approach.

ACS Style

Walter Belardi; Pier J. Sazio; Laurent Bigot. Hollow core fibers for optical amplification. Optics Letters 2019, 44, 4127 -4130.

AMA Style

Walter Belardi, Pier J. Sazio, Laurent Bigot. Hollow core fibers for optical amplification. Optics Letters. 2019; 44 (17):4127-4130.

Chicago/Turabian Style

Walter Belardi; Pier J. Sazio; Laurent Bigot. 2019. "Hollow core fibers for optical amplification." Optics Letters 44, no. 17: 4127-4130.

Journal article
Published: 11 August 2019 in Fibers
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We discuss the fabrication of hollow-core optical fibers made of borosilicate glass. We show that, despite the high attenuation of the glass relative to silica, the fiber optical losses can be of the same order of magnitude of those obtained by using ultrapure silica glass. Short lengths of the fabricated fibers, used in combination with incoherent optical sources, provide single-mode optical guidance in both near and mid-infrared spectral ranges without any additional optical components.

ACS Style

Walter Belardi; Pier John Sazio. Borosilicate Based Hollow-Core Optical Fibers. Fibers 2019, 7, 73 .

AMA Style

Walter Belardi, Pier John Sazio. Borosilicate Based Hollow-Core Optical Fibers. Fibers. 2019; 7 (8):73.

Chicago/Turabian Style

Walter Belardi; Pier John Sazio. 2019. "Borosilicate Based Hollow-Core Optical Fibers." Fibers 7, no. 8: 73.

Editorial
Published: 24 May 2019 in Fibers
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The possibility of guiding light in air has fascinated optical scientists and engineers since the dawn of optical fiber technology

ACS Style

Walter Belardi. Hollow-Core Optical Fibers. Fibers 2019, 7, 50 .

AMA Style

Walter Belardi. Hollow-Core Optical Fibers. Fibers. 2019; 7 (5):50.

Chicago/Turabian Style

Walter Belardi. 2019. "Hollow-Core Optical Fibers." Fibers 7, no. 5: 50.