Zobrazeno 1 - 10
of 32
pro vyhledávání: '"Gholamreza Shayeganrad"'
Autor:
Yuhao Lei, Gholamreza Shayeganrad, Huijun Wang, Masaaki Sakakura, Yanhao Yu, Lei Wang, Dmitrii Kliukin, Linards Skuja, Yuri Svirko, Peter G. Kazansky
Publikováno v:
Light: Science & Applications, Vol 12, Iss 1, Pp 1-8 (2023)
Efficient creation of anisotropic nanopores and associated birefringence in fused silica by elliptically polarized femtosecond laser pulses is observed. Applications in multiplexed optical data storage and optical elements are demonstrated.
Externí odkaz:
https://doaj.org/article/45e829d3b3fa4b6ea10b098e49ace76f
Birefringent patterning by ultrafast laser nanostructuring in silica glass has been used for space-variant birefringent optics with high durability and high optical damage threshold. We demonstrate that the oblate-shaped birefringent modification (ty
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e3d46631d32f636f3d12ecaca069d735
https://eprints.soton.ac.uk/472236/
https://eprints.soton.ac.uk/472236/
Autor:
Huijun Wang, Yuhao Lei, Lei Wang, Masaaki Sakakura, Yanhao Yu, Gholamreza Shayeganrad, Peter G. Kazansky
The demand for energy efficient data storage technologies with high capacity and long life span is increasingly growing due to the explosion of digital information in modern society. Here, a 5D optical data storage with high capacity and ultralong li
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5154b67954c7a8be7cbba3361d05760f
https://eprints.soton.ac.uk/454852/
https://eprints.soton.ac.uk/454852/
Publikováno v:
Conference on Lasers and Electro-Optics.
Efficient creation of anisotropic nanopores and associated birefringence in silica glass by elliptically polarized femtosecond laser pulses is observed, contrary to common belief. Application to multiplexed optical data storage is demonstrated.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a2308e81ad9db12a64cd8691566077bd
https://doi.org/10.1364/cleo_si.2022.sf3l.4
https://doi.org/10.1364/cleo_si.2022.sf3l.4
Publikováno v:
2021 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC).
A new type of birefringent modification (oblate nanopores or type X) with high optical transmission (>99%) was recently reported in silica glass using ultrafast laser writing [1] . This enables low-loss geometric phase (GP) flat optical elements with
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2e14bc79ecc34b04ec95101e0f60a5c6
https://doi.org/10.1109/cleo/europe-eqec52157.2021.9542359
https://doi.org/10.1109/cleo/europe-eqec52157.2021.9542359
Publikováno v:
2021 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC).
Due to the information explosion in the 21st century, data storage technologies to meet the growing demand for information preservation have attracted considerable interest. Based on self-assembled nanogratings produced by ultrafast laser writing in
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5ac3ca30236b4cea31fc274e50c3f461
https://doi.org/10.1109/cleo/europe-eqec52157.2021.9541757
https://doi.org/10.1109/cleo/europe-eqec52157.2021.9541757
Autor:
Gholamreza Shayeganrad
Publikováno v:
Journal of Modern Optics. 67:81-91
This paper reports an experimental study of the shot-to-shot intensity and spectral distribution fluctuations in the femtosecond coherent pulses from the storage ring (SR) based seeded free electron laser (FEL) at DELTA. A unique implementation of a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a782b8fb54d7d89d357ac014b5fda0a4
https://doi.org/10.1080/09500340.2019.1629658
https://doi.org/10.1080/09500340.2019.1629658
Ultrafast laser nanostructuring in transparent materials for beam shaping and data storage [Invited]
Publikováno v:
Optical Materials Express. 12:3327
We review recent progress in femtosecond laser anisotropic nanostructuring of transparent materials, including silica glass and thin films. With different writing parameters, oblate nanopores, single lamella-like structures and nanoripples are demons
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4f4350c377536596b9e16baa326806f5
https://doi.org/10.1364/ome.463151
https://doi.org/10.1364/ome.463151
Autor:
Gholamreza Shayeganrad
Publikováno v:
Optics and Lasers in Engineering. 111:80-85
Recently, we have demonstrated a longitudinally pumped tunable dual-wavelength Ti:sapphire laser that can operate at simultaneous dual-wavelength (765.0, 771.3 nm), (763.9, 772.2 nm), (763.5, 772.2 nm) and (762.4, 773.7 nm) with a pulse width of ∼2
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::82f727bf8def532421187b64f81890cc
https://doi.org/10.1016/j.optlaseng.2018.07.015
https://doi.org/10.1016/j.optlaseng.2018.07.015
Autor:
Gholamreza Shayeganrad
Publikováno v:
Optik. 174:715-726
In general, misalignment, surface quality of optical components, thermal and nonlinear properties, doping level and inhomogeneity in the gain material can induce unexpected pulse propagation effects on intnese femtosecond laser pulses. Among them, th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0b751367ccdd75010e5c6ba0629cbb9a
https://doi.org/10.1016/j.ijleo.2018.08.120
https://doi.org/10.1016/j.ijleo.2018.08.120