Investigation of the drawing region in the production of Ge-S-I optical fibers for infrared applications

Chazot, Matthieu; Amraoui, Mohammed El; Morency, Steeve; Messaddeq, Younès; Rodriguez, Vincent

doi:10.1016/j.jnoncrysol.2017.09.037

Cited by 11 publications

(9 citation statements)

References 19 publications

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“…Similar composition dependence of the λ S was also observed in Ge 25 S 75-x I x glasses. 24 To understand this situation, the influencing factors on the λ S need to be comprehensively considered. It is known 25 that a glass, which is composed of atoms with lower polarizability, anions with higher electron affinity, and chemical bonds with higher bond energy, tends to possess a smaller λ S. Considering that I has lower polarizability and higher electron affinity than S, 26 the red shift of the λ S in Ga 8 Sb 32 S 60-x I x glasses could be associated with the lower bond energy of Ga-I (2.52 eV) than Ga-S (2.65 eV).…”

Section: Discussionmentioning

confidence: 99%

Ga‐Sb‐S‐I chalcohalide glasses and fibers for mid‐infrared applications

et al. 2019

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In this work, environment friendly Ga‐Sb‐S‐I chalcohalide glasses and fibers are developed for mid‐infrared applications. The developed Ga8Sb32S60‐xIx (x = 0‐10) glasses have a transmission window of ~0.7‐14 µm, linear refractive indices (n0) of ~ 2.690‐2.751 at 1.55 µm, nonlinear refractive indices (n2) of ~10.5‐12.4 × 10−14 cm2/W at 1.55 µm, and zero dispersion wavelengths (λ0) of ~4.94‐5.25 µm. The developed Ga8Sb32S55I5/Ga8Sb31S56I5 (core/cladding) fiber can transmit infrared light from below 2 µm to ~8 µm, and shows the minimum loss of ~1.2 dB/m at ~6 µm. The wide transmission window, high optical nonlinearity and superior thermal stability against crystallization of the glasses, and the good 2‐8 µm transmission property of the fiber make these materials promising for mid‐infrared applications such as thermal imaging, nonlinear optics, and laser transmission.

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Section: Discussionmentioning

confidence: 99%

Ga‐Sb‐S‐I chalcohalide glasses and fibers for mid‐infrared applications

et al. 2019

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“…The specific choice of the intermediate composition Ge 31.7 S 58.3 I 10 is related to the parameter Δ that we introduced in a previous publication. [15] This parameter points out the deviation from the stoichiometry for Ge−S−I glasses, taking into account the role of iodine as a modifier in the structure. In contrast to the other composition, Ge 31.7 S 58.3 I 10 presents an extremum in Tg and band-gap properties for the series of glasses containing 10% of iodine (see Figure 3 photographies).…”

Section: Experimental Ir and Raman Spectra: Unified Trimodal Analysismentioning

confidence: 99%

“…[10] Since then, many works have been published on the characterization of their thermal and optical properties. [11−14] In a previous work, [15] we analyzed the Tg and optical transparency in the visible of Ge−S−I glasses having 5, 10, and 15% at of iodine. We pointed out that those glasses exhibit an extremum of their Tg and band gap near the stoichiometry following the (GeS 2 ) x -(GeI 4 ) 1−x composition line, showing that iodine does act as a network modifier.…”

Section: Introductionmentioning

confidence: 99%

“…Ge–S–I glasses have been obtained for the first time in 1971, but recently, they received a gain of attention with the publication of new works demonstrating the possibility to make high purity glasses by thermal decomposition of Ge 2 S 3 I 2 . Since then, many works have been published on the characterization of their thermal and optical properties. − In a previous work, we analyzed the Tg and optical transparency in the visible of Ge–S–I glasses having 5, 10, and 15% at of iodine. We pointed out that those glasses exhibit an extremum of their Tg and band gap near the stoichiometry following the (GeS 2 ) x (GeI 4 ) 1– x composition line, showing that iodine does act as a network modifier.…”

Section: Introductionmentioning

confidence: 99%

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Multimodal Structural Characterization of Ge–S–I Glasses by Combination of DFT Calculation and IR and Polarized Raman Spectroscopy

et al. 2019

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From a dual experimental−theoretical vibrational analysis, we propose a new rationalized structural description of Ge−S−I chalcogenides glasses at the nanoscale. A vibrational multipolar approach based on a simultaneous deconvolution of infrared (IR) and polarized Raman spectra (RS-VV and RS-HV) has been applied on these glasses. According to recent results on the amorphous GeS 2 structure by X-Ray and neutron diffraction and to our spectral analyses, we suggest that the local structure of the glass backbone is effectively described by a combination of α-GeS 2 nanolayers, edge-sharing GeS 4 tetrahedra (ES-Td, ca ~50%), and cornersharing GeS 4 tetrahedra (CS-Td, ca ~50%). We have then compared the experimental spectra to the calculated IR and polarized Raman spectra of some selected Ge x S y I z structural units obtained by density functional theory calculation. The stretching modes of the Ge−S−I occurring in the high frequency spectral range (300−450 cm −1) are essentially those of the GeS 2 glass backbone and have been revisited. In addition, through a careful analysis of the vibrational multipolar activities of stoichiometric and over-stoichiometric sulfur glasses between 180 and 280 cm −1 , we propose new assignments for the seven modes that have been identified by our trimodal spectral analysis. We finally suggest that there is a competition between the insertion of atomic iodine as a glass modifier which involves the Ge−S−I clusters and molecular diiodine as a spectator encaged between two α-GeS 2 nanolayers.

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“…Such ChG glasses (ChGs) compatible with fiber drawing operations and allowing for SC generation are even less common. We can cite the work of [2] based on an As and Sb-free core glass containing iodine (but with a Sb-containing clad glass) difficult to process in particular during the drawing because of iodine degassing and phase separation issues [21].…”

Section: Introductionmentioning

confidence: 99%

Mid-infrared supercontinuum generation from 2 to 14 μm in arsenic- and antimony-free chalcogenide glass fibers

et al. 2019

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We demonstrate the fabrication of arsenic-and antimony-free chalcogenide glasses compatible with glass fiber processing. Optical fibers with distinct index profiles are presented and characterized, namely single material fibers with or without a suspended core and standard step-index fibers with varying core diameter. In addition, we evidence their potential for nonlinear photonic devices in the mid-infrared spectral region by means of supercontinuum generation experiments in the femtosecond regime. Spectral broadenings are obtained, extending on several octaves in the mid IR from 2 to 14 µm.

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Investigation of the drawing region in the production of Ge-S-I optical fibers for infrared applications

Cited by 11 publications

References 19 publications

Ga‐Sb‐S‐I chalcohalide glasses and fibers for mid‐infrared applications

Ga‐Sb‐S‐I chalcohalide glasses and fibers for mid‐infrared applications

Multimodal Structural Characterization of Ge–S–I Glasses by Combination of DFT Calculation and IR and Polarized Raman Spectroscopy

Mid-infrared supercontinuum generation from 2 to 14 μm in arsenic- and antimony-free chalcogenide glass fibers

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