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Akademický článek

Adaptive demodulation by deep-learning-based identification of fractional orbital angular momentum modes with structural distortion due to atmospheric turbulence

Autor: Youngbin Na, Do-Kyeong Ko

Publikováno v: Scientific Reports, Vol 11, Iss 1, Pp 1-12 (2021)

Abstract Since the great success of optical communications utilizing orbital angular momentum (OAM), increasing the number of addressable spatial modes in the given physical resources has always been an important yet challenging problem. The recent i

Externí odkaz: https://doaj.org/article/c6d6caea3ba74414b088a9c87f55c7a8

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Akademický článek

Deep-learning-based high-resolution recognition of fractional-spatial-mode-encoded data for free-space optical communications

Autor: Youngbin Na, Do-Kyeong Ko

Publikováno v: Scientific Reports, Vol 11, Iss 1, Pp 1-11 (2021)

Abstract Structured light with spatial degrees of freedom (DoF) is considered a potential solution to address the unprecedented demand for data traffic, but there is a limit to effectively improving the communication capacity by its integer quantizat

Externí odkaz: https://doaj.org/article/31b497c7dac14df7969ac14e011bc194

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Akademický článek

Photochemical pathways of 8-oxo-2′-deoxyguanosine under photodegradation

Autor: Terry Park, Ingu Lee, Seong-Jin Son, Youngbin Na, Do-Kyeong Ko

Publikováno v: AIP Advances, Vol 12, Iss 2, Pp 025109-025109-9 (2022)

The common product of an oxidatively damaged DNA, 8-oxo-2′-deoxyguanosine (8-oxo-dG), is known for photorepairing cyclobutane pyrimidine dimers. This study is to uncover the dynamics of 8-oxo-dG under photodegradation, which are poorly understood.

Externí odkaz: https://doaj.org/article/311c84dc25f94500896e04f23c07e9ab

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Transient absorption spectroscopy of a twisted intramolecular charge transfer (TICT) state in a DCM molecule analyzed by isosbestic points

Autor: Terry Park, Ingu Lee, Seong-Jin Son, Youngbin Na, Do-Kyeong Ko

Publikováno v: Journal of the Korean Physical Society. 80:585-591

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::bcb57fee4117e9a5d262a4b371661bd1
https://doi.org/10.1007/s40042-022-00461-7

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Shape-invariant Bessel-Gaussian beams with fractional orbital angular momentum for deep-learning-based optical communication links

Autor: Youngbin Na, Do-Kyeong Ko

Publikováno v: Laser Beam Shaping XXII.

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::658d584c12ecac8678e0f9e2a0aa6dcc
https://doi.org/10.1117/12.2632606

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A study on the utilization of deep learning for identifying fractional orbital angular momentum beams in atmospheric turbulence media

Autor: Youngbin Na, Do-Kyeong Ko

Publikováno v: Optics, Photonics and Digital Technologies for Imaging Applications VII.

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::c3660a5f8d92b8b71255e76b94934eeb
https://doi.org/10.1117/12.2621104

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Adaptive demodulation by deep-learning-based identification of fractional orbital angular momentum modes with structural distortion due to atmospheric turbulence

Autor: Do-Kyeong Ko, Youngbin Na

Publikováno v: Scientific Reports
Scientific Reports, Vol 11, Iss 1, Pp 1-12 (2021)

Since the great success of optical communications utilizing orbital angular momentum (OAM), increasing the number of addressable spatial modes in the given physical resources has always been an important yet challenging problem. The recent improvemen

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5c21b22652806b5ec5e4c1ddb7d1c190
https://doi.org/10.1038/s41598-021-03026-z

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High-resolution refractometry using phase shifting interferometry based on spatial light modulator and vortex probe

Autor: Do-Kyeong Ko, Youngbin Na

Publikováno v: Optics & Laser Technology. 112:479-484

We present a spatial light modulator (SLM) based phase shifting interferometry (PSI) using an optical vortex for sensing the refractive index (RI) of liquids. The vortex phase rotates according to the phase shift introduced by a medium, and its rotat

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::565caa5c560a2ff1fea125d11a831430
https://doi.org/10.1016/j.optlastec.2018.11.053

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Deep-learning-based high-resolution recognition of fractional-spatial-mode-encoded data for free-space optical communications

Autor: Do-Kyeong Ko, Youngbin Na

Publikováno v: Scientific Reports, Vol 11, Iss 1, Pp 1-11 (2021)
Scientific Reports

Structured light with spatial degrees of freedom (DoF) is considered a potential solution to address the unprecedented demand for data traffic, but there is a limit to effectively improving the communication capacity by its integer quantization. We p

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::46fc17c441f06df24e4e04a8b2eaf4d2
https://doi.org/10.1038/s41598-021-82239-8

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Amplitude-modulated log-polar coordinate mapping for generating top-hat line-shaped beams with steep edges and a high aspect ratio

Autor: Do-Kyeong Ko, Youngbin Na

Publikováno v: Optics & Laser Technology. 134:106587

We present a method, based on conformal mapping, to generate top-hat line-shaped beams. The familiar Cartesian to log-polar coordinate transformation and additional amplitude modulation are combined to transform an input beam with a circular symmetry

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::c414b673bb4ac231a7828a43b4399b74
https://doi.org/10.1016/j.optlastec.2020.106587

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