In the Heart of Femtosecond Laser Induced Nanogratings: From Porous Nanoplanes to Form Birefringence

Desmarchelier, Rudy; Poumellec, Bertrand; Brisset, François; Mazerat, S.; Lancry, Matthieu

doi:10.4236/wjnse.2015.54014

Cited by 37 publications

(37 citation statements)

References 21 publications

(25 reference statements)

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“…Finally, the ensemble was placed on a translation stage, carefully aligned with respect to the fs laser beam, then irradiated. More information regarding the laser setup can be found in [74].…”

Section: Methodsmentioning

confidence: 99%

“…This experiment was repeated using two different laser polarization orientations: parallel (//) and perpendicular (⊥) to the laser writing inscription. The former condition enables the observation of the inside (which are porous in bulk SiO 2 [55]) of the laser-induced nanoplanes, while the latter permits sideways visualization of these nanoplanes, including their spacing [74].…”

Section: Methodsmentioning

confidence: 99%

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Overview of high temperature fibre Bragg gratings and potential improvement using highly doped aluminosilicate glass optical fibres

et al. 2019

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In this paper, various types of high temperature fibre Bragg gratings (FBGs) are reviewed, including recent results and advancements in the field. The main motivation of this review is to highlight the potential of fabricating thermally stable refractive index contrasts using femtosecond (fs) nearinfrared radiation in fibres fabricated with non-conventional techniques, such as the molten core method. As a demonstration of this, an yttrium aluminosilicate (YAS) core and pure silica cladding glass optical fibre is fabricated and investigated after being irradiated by an fs laser within the Type II regime. The familiar formation of nanogratings inside both core and cladding regions are identified and studied using birefringence measurements and scanning electron microscopy. The thermal stability of the Type II modifications is then investigated through isochronal annealing experiments (up to T=1100°C; time steps, Δt=30 min). For the YAS core composition, the measured birefringence does not decrease when tested up to 1000°C, while for the SiO 2 cladding under the same conditions, its value decreased by ∼30%. These results suggest that inscription of such 'Type II fs-IR' modifications in YAS fibres could be employed to make FBGs with high thermal stability. This opens the door toward the fabrication of a new range of 'FBG host fibres' suitable for ultra-high temperature operation. ORCID iDsMaxime Cavillon https:/ /orcid.org/0000-0003-1341-6294 Peter Dragic https:/ /orcid.org/0000-0002-4413-9130 Figure 5. Normalized retardance (averaged over the 0.1 to 1.0 μJ pulse energy range) as a function of temperature for YAG-derived fibre at the core center (YAS) and in the cladding (SiO 2 ), for both // and ⊥ configurations. The measurements were performed at room temperature.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Overview of high temperature fibre Bragg gratings and potential improvement using highly doped aluminosilicate glass optical fibres

et al. 2019

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“…The following three factors are considered in such phenomena. The first is the change in the periodicity of the nanograting structure . In this case, the modulation of the doped anion concentration is also included.…”

Section: Resultsmentioning

confidence: 99%

“…The first is the change in the periodicity of the | 3913 nanograting structure. 37 In this case, the modulation of the doped anion concentration is also included. The second one is the change in the porosity.…”

Section: Resultsmentioning

confidence: 99%

Tunability of form birefringence induced by femtosecond laser irradiation in anion‐doped silica glass

et al. 2017

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Form birefringence originating from self‐assembly of the bulk nanograting structures in silica glass with various anion dopants (OH, Cl and F) was induced by the femtosecond laser pulses. Despite the almost similar nanostructure, the photo‐induced birefringence can be changed by the anion dopants in glass. Larger birefringence can be induced in silica glass doped with higher Cl ion concentration. Even if F‐doped silica glass indicates lower thermal stability, its lifetime could be evaluated to be at least several billion years.

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“…One of possible solutions for zero-order waveplate with high LID threshold values is direct writing of nanogratings and inducing birefringence in silica glass using laser radiation. [8] Although, this novel method causes the formation of desirable phase delay, the features in the structure of nanogratings induce scattering, especially in UV region. The optical losses are 30% for the wavelength of 532 nm and >50% for the shorter wavelengths than 300 nm.…”

Section: Introductionmentioning

confidence: 99%

Highly Resistant Zero‐Order Waveplates Based on All‐Silica Multilayer Coatings

Grinevičiūtė

Andrulevičius

Melninkaitis

et al. 2017

Physica Status Solidi (a)

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Waveplates, used to modify polarization state of light, are integral part of high‐power lasers. Classical approach to waveplate manufacturing is based on combination of birefringent crystalline materials and deposition of nonpolarizing antireflection (AR) coatings. Their limitation to withstand maximal peak power is determined by laser‐induced damage (LID) phenomena, mainly determined by low band‐gap materials used in AR coatings. In this study, a novel multi‐layer approach of high band‐gap birefringent coatings was proposed and investigated to overcome this limitation. Three eligible candidate materials, namely LaF3, Al2O3, and SiO2 are investigated. Structural and optical analysis reveal superior properties of silica for UV spectral range. Zero‐order thin film retarders based on all‐silica nano‐structures are fabricated by oblique angle deposition process. Low optical losses and high transparency (T ∼ 99%) are demonstrated while indicating potential to withstand high laser fluence of 40 J cm−2 in nanosecond regime at 355 nm wavelength. Such waveplates can essentially improve maximal tolerated peak power and thus allow production of more compact optical systems, even when high laser power is used.

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In the Heart of Femtosecond Laser Induced Nanogratings: From Porous Nanoplanes to Form Birefringence

Cited by 37 publications

References 21 publications

Overview of high temperature fibre Bragg gratings and potential improvement using highly doped aluminosilicate glass optical fibres

Overview of high temperature fibre Bragg gratings and potential improvement using highly doped aluminosilicate glass optical fibres

Tunability of form birefringence induced by femtosecond laser irradiation in anion‐doped silica glass

Highly Resistant Zero‐Order Waveplates Based on All‐Silica Multilayer Coatings

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