Refractive-index measurements of undoped yttrium aluminum garnet from 04 to 50 μm

Zelmon, David E.; Small, David; Page, Ralph H.

doi:10.1364/ao.37.004933

Cited by 145 publications

(61 citation statements)

References 4 publications

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“…Although the refractive index of Al 2 O 3 (1.60) does not match that of YAG (1.82) 53 , the sample nanostructure enables high transparency to be retained during glass crystallization (the nanosize of both YAG and Al 2 O 3 grains minimizes light scattering according to the Rayleigh–Gans–Debye theory) 28 . The transmittance spectrum recorded in the UV–VIS–NIR and MIR regions is presented Fig.…”

Section: Resultsmentioning

confidence: 99%

“…d Transmission spectra in UV–VIS–NIR and MIR region of the YAG-Al 2 O 3 ceramic measured through a 1.5 mm thick sample. The dashed gray line corresponds to the theoretical maximum transmission of YAG[53] (the refractive index of YAG single crystal and YAG-Al 2 O 3 ceramic at 589 nm is 1.82 and 1.77, respectively). The photograph of the YAG-Al 2 O 3 ceramic sample (diameter = 4.5 mm) placed 2 cm above the text is embedded…”

Section: Introductionmentioning

confidence: 99%

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Pressureless glass crystallization of transparent yttrium aluminum garnet-based nanoceramics

et al. 2018

Nat Commun

153

115

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Transparent crystalline yttrium aluminum garnet (YAG; Y3Al5O12) is a dominant host material used in phosphors, scintillators, and solid state lasers. However, YAG single crystals and transparent ceramics face several technological limitations including complex, time-consuming, and costly synthetic approaches. Here we report facile elaboration of transparent YAG-based ceramics by pressureless nano-crystallization of Y2O3–Al2O3 bulk glasses. The resulting ceramics present a nanostructuration composed of YAG nanocrystals (77 wt%) separated by small Al2O3 crystalline domains (23 wt%). The hardness of these YAG-Al2O3 nanoceramics is 10% higher than that of YAG single crystals. When doped by Ce3+, the YAG-Al2O3 ceramics show a 87.5% quantum efficiency. The combination of these mechanical and optical properties, coupled with their simple, economical, and innovative preparation method, could drive the development of technologically relevant materials with potential applications in wide optical fields such as scintillators, lenses, gem stones, and phosphor converters in high-power white-light LED and laser diode.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Pressureless glass crystallization of transparent yttrium aluminum garnet-based nanoceramics

et al. 2018

Nat Commun

153

115

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“…Dispersion of YAG crystal was included in the model through a Sellmeier relation46. The zero group-velocity dispersion wavelength for YAG is λ z ≈ 1610 nm.…”

Section: Modelingmentioning

confidence: 99%

Power-scalable subcycle pulses from laser filaments

Voronin

Желтиков

2017

Sci Rep

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Compression of optical pulses to ultrashort pulse widths using methods of nonlinear optics is a well-established technology of modern laser science. Extending these methods to pulses with high peak powers, which become available due to the rapid progress of laser technologies, is, however, limited by the universal physical principles. With the ratio P/Pcr of the peak power of an ultrashort laser pulse, P, to the critical power of self-focusing, Pcr, playing the role of the fundamental number-of-particles integral of motion of the nonlinear Schrödinger equation, keeping this ratio constant is a key principle for the power scaling of laser-induced filamentation. Here, we show, however, that, despite all the complexity of the underlying nonlinear physics, filamentation-assisted self-compression of ultrashort laser pulses in the regime of anomalous dispersion can be scaled within a broad range of peak powers against the principle of constant P/Pcr. We identify filamentation self-compression scaling strategies whereby subcycle field waveforms with almost constant pulse widths can be generated without a dramatic degradation of beam quality within a broad range of peak powers, varying from just a few to hundreds of Pcr.

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“…Considering the refractive index of the YAG [17] substrate and undoped Y 2 O 3 [18] (1.82 and 1.91 respectively at 800 nm), and noting that this Tm dopant concentration likely results in a negligible index increase, the numerical aperture (NA) of the waveguide at the pump and lasing wavelengths was calculated to be 0.58 and 0.57 respectively. The 12 µm-thick film should hence support up to 50 and 20 modes at the pump and laser wavelengths respectively, and is therefore a highly multi-mode structure.…”

Section: Waveguide Characterizationmentioning

confidence: 99%