Zobrazeno 1 - 7
of 7
pro vyhledávání: '"Trygve Sørgård"'
Publikováno v:
Optics Express
High speed optical modulation of THz radiation is of interest for information processing and communications applications. In this paper infrared femtosecond pulses are used to generate free carriers that reduce the THz transmission of silicon based w
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::838c1edc16043f4cfa4f9eb733aadd89
https://hdl.handle.net/11250/2982328
https://hdl.handle.net/11250/2982328
Autor:
Ulf Osterberg, Ursula J. Gibson, Valdas Pasiskevicius, Kjell Martin Molster, Fredrik Laurell, Trygve Sørgård
Publikováno v:
Optical Materials Express
The waveguiding properties of high-resistivity float zone silicon slab waveguides are characterized over the spectral range from 0.5 to 7.5 THz. Waveguide modes and dispersion are observed for lengths of 1.2 cm and silicon thicknesses from 40 to 300
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b09d78136fda5db7581160c95a5e9f44
http://hdl.handle.net/11250/2641316
http://hdl.handle.net/11250/2641316
Autor:
Trygve Sørgård, Fredrik Laurell, Kjell Martin Molster, Carlota Canalias, Hugo Laurell, Valdas Pasiskevicius, Ulf Osterberg
Publikováno v:
2019 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC).
Terahertz (THz) radiation has been of increasing interest in the last decades, for security, manufacturing, quality control, medical and security imaging applications. The field requires more efficient and affordable sources and nonlinear upconversio
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::28de4fda1d34f0b92c36a8f39f5cad38
https://doi.org/10.1109/cleoe-eqec.2019.8871579
https://doi.org/10.1109/cleoe-eqec.2019.8871579
Autor:
Ulf Osterberg, Thomas Hawkins, Per Erik Vullum, Cristine Calil Kores, Fredrik Laurell, John Ballato, Kjell Martin Molster, Ursula J. Gibson, Trygve Sørgård, Seunghan Song
Publikováno v:
Optical Materials Express
Silicon waveguide structures are a viable alternative for the transmission of signals over a wide range of frequencies, and new fabrication methods are key to increased applications. In this work, THz transparency of silicon-core, silica clad fibers,
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::405fff5e4761b73da9f10a7e5ecd1845
https://doi.org/10.1364/ome.403591
https://doi.org/10.1364/ome.403591
Autor:
John Ballato, Wei Wu, Thomas Hawkins, Xiong Yang, Korbinian Mühlberger, Michael Fokine, Fredrik Laurell, Ursula J. Gibson, Trygve Sørgård
Publikováno v:
Conference on Lasers and Electro-Optics.
We investigate CO 2 laser processing of SiGe-core glass fibers, and show that homogeneous, low optical loss cores can be made. Coaxial Ge-rich centers within the semiconductor cores can also be fabricated.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c876fa5b2f9fb0cf851854f768e26707
https://doi.org/10.1364/cleo_si.2018.sf3i.6
https://doi.org/10.1364/cleo_si.2018.sf3i.6
Autor:
Ulf Osterberg, Anna C. Peacock, Noel Healy, Michael Fokine, Seunghan Song, Trygve Sørgård, Ursula J. Gibson
Publikováno v:
Frontiers in Optics 2017.
This paper reports recent results on the formation of GaSb-core fibers, formed by molten-core drawing. Purity, crystallographic results and preliminary photoluminescence data are provided for both the as-drawn and laser annealed fibers.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::092e2df46e869174e976352d43635575
https://doi.org/10.1364/fio.2017.jw4a.117
https://doi.org/10.1364/fio.2017.jw4a.117
Publikováno v:
Proceedings of SPIE
A fiber-coupled Terahertz time domain spectroscopy (THz-TDS) system based on photoconductive antennas, pumped by a 100-fs fiber laser, has been used to characterize materials in transmission and reflection mode. THz images are acquired by mounting th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fc8c1721aa5665809adf866738918dec
https://doi.org/10.1117/12.2217726
https://doi.org/10.1117/12.2217726