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   Articles with "optical spectra" as a keyword



Study of the Optical Spectra of 4-Hydroxy-3-Methoxibenzoic Acid

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recommendations! Published in 2020 at "Russian Physics Journal"

DOI: 10.1007/s11182-020-02183-4

Abstract: Using electronic spectroscopy and quantum chemistry methods, the electronic spectra of vanillic acid in various solvents are interpreted. In the ground electronic state, four protolytic forms of vanillic acid in water were detected: anionic, dianionic,… read more here.

Keywords: vanillic acid; acid; optical spectra; study optical ... See more keywords
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Optical spectra and gain properties of Er3+:Lu2O3 ceramics for eye-safe 1.5-μm lasers

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recommendations! Published in 2021 at "Optical Materials"

DOI: 10.1016/j.optmat.2020.110785

Abstract: Abstract The Er3+-doped Lu2O3 ceramics were successfully prepared by high temperature vacuum sintering of nanopowders using lantana as a sintering additive. The absorption coefficient and absorption cross-section of Er3+ ions in Lu2O3 ceramics at 980 nm… read more here.

Keywords: optical spectra; lu2o3 ceramics; gain; spectra gain ... See more keywords

Abundances of disk and bulge giants from high-resolution optical spectra : I. O, Mg, Ca, and Ti in the solar neighborhood and Kepler field samples

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recommendations! Published in 2017 at "Astronomy and Astrophysics"

DOI: 10.1051/0004-6361/201629128

Abstract: Context. The Galactic bulge is an intriguing and significant part of our Galaxy, but it is hard to observe because it is both distant and covered by dust in the disk. Therefore, there are not… read more here.

Keywords: optical spectra; high resolution; solar neighborhood; resolution optical ... See more keywords

4D Grid-fitting of UV-optical Spectra of Massive Stars. I. Numerical Technique and its Associated Uncertainties

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recommendations! Published in 2024 at "Research in Astronomy and Astrophysics"

DOI: 10.1088/1674-4527/addbc6

Abstract: The best way to check the validity of our theories (models) is by direct comparison with the experiment (observations). However, this process suffers from numerical inaccuracies, which are not frequently studied and often remain mostly… read more here.

Keywords: precision; optical spectra; grid fitting; precision derived ... See more keywords

A blue depression in the optical spectra of M dwarfs

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recommendations! Published in 2023 at "Monthly Notices of the Royal Astronomical Society"

DOI: 10.1093/mnras/stad1391

Abstract: A blue depression is found in the spectra of M dwarfs from 4000 to 4500Å. This depression shows an increase toward lower temperatures though is particularly sensitive to gravity and metallicity. It is the single… read more here.

Keywords: optical spectra; spectra dwarfs; depression; line ... See more keywords

A disc wind origin for the optical spectra of dwarf novae in outburst

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recommendations! Published in 2024 at "Monthly Notices of the Royal Astronomical Society"

DOI: 10.1093/mnras/stae1557

Abstract: Many high-state cataclysmic variables (CVs) exhibit blue-shifted absorption features in their ultraviolet (UV) spectra – a smoking-gun signature of outflows. However, the impact of these outflows on optical spectra remains much more uncertain. During its… read more here.

Keywords: optical spectra; disc; dot; disc wind ... See more keywords

Observation of Periodic Optical Spectra and Soliton Molecules in a Novel Passively Mode-Locked Fiber Laser

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recommendations! Published in 2024 at "Journal of Lightwave Technology"

DOI: 10.1109/jlt.2024.3390059

Abstract: Due to the necessity of making a series of random adjustments after mode-locking in most experiments for preparing soliton molecules, the repeatability of the preparations remains a challenge. Here, we introduce a novel all-polarization-maintaining erbium-doped… read more here.

Keywords: soliton; laser; fiber laser; optical spectra ... See more keywords
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Passive Sub-Carrier Multiplexing for Discriminating Overlapped Optical Spectra

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recommendations! Published in 2018 at "IEEE Photonics Technology Letters"

DOI: 10.1109/lpt.2018.2868048

Abstract: A passive technique for multiplexing spectrally overlapping optical network signals is proposed and experimentally verified. The system utilizes arrayed fiber delay lines for multiplexing signal generation and offers simultaneous plotting of multiple optical spectra. Accurate… read more here.

Keywords: optical spectra; sub carrier; multiplexing discriminating; passive sub ... See more keywords

Machine Learning-Based in-Band OSNR Estimation From Optical Spectra

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recommendations! Published in 2019 at "IEEE Photonics Technology Letters"

DOI: 10.1109/lpt.2019.2950058

Abstract: Measuring the optical signal to noise ratio (OSNR) at certain network points is essential for failure handling, for single connection but also global network optimization. Estimating OSNR is inherently difficult in dense wavelength routed networks,… read more here.

Keywords: osnr estimation; optical spectra; machine; estimation ... See more keywords

Calculating Multidimensional Optical Spectra from Classical Trajectories.

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recommendations! Published in 2022 at "Annual review of physical chemistry"

DOI: 10.1146/annurev-physchem-082620-021302

Abstract: Multidimensional optical spectra are measured from the response of a material system to a sequence of laser pulses and have the capacity to elucidate specific molecular interactions and dynamics whose influences are absent or obscured… read more here.

Keywords: chemistry; calculating multidimensional; classical trajectories; spectra classical ... See more keywords

Band Structure and Optical Spectra of Double Perovskite Cs2AgBiBr6 for Solar Cells Performance

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recommendations! Published in 2020 at "Acta Physica Polonica A"

DOI: 10.12693/aphyspola.137.486

Abstract: The present study reports on the electronic band structure and optical properties of Cs2AgBiBr6 doubleperovskite material using a pseudopotential plane-wave method within the generalized gradient approximation. Our results show that Cs2AgBiBr6 has a good absorption… read more here.

Keywords: optical spectra; band; structure optical; spectra double ... See more keywords