Zobrazeno 1 - 10
of 353
pro vyhledávání: '"Karsten, Rottwitt"'
Autor:
Mikkel T. Hansen, Emil Z. Ulsig, Fabien Labbé, Magnus L. Madsen, Yunhong Ding, Karsten Rottwitt, Nicolas Volet
Publikováno v:
Frontiers in Photonics, Vol 4 (2023)
A double-ridge waveguide is designed for efficient and robust second-harmonic generation (SHG) using the thin-film lithium-niobate-on-insulator (LNOI) platform. Perfect phase matching (PhM) is achieved between the fundamental waveguide mode at 1,550
Externí odkaz:
https://doaj.org/article/ec3464014265436aa9eb1c6ec3b20d87
Autor:
Beatrice Da Lio, Daniele Cozzolino, Nicola Biagi, Yunhong Ding, Karsten Rottwitt, Alessandro Zavatta, Davide Bacco, Leif K. Oxenløwe
Publikováno v:
npj Quantum Information, Vol 7, Iss 1, Pp 1-6 (2021)
Abstract Quantum key distribution (QKD) protocols based on high-dimensional quantum states have shown the route to increase the key rate generation while benefiting of enhanced error tolerance, thus overcoming the limitations of two-dimensional QKD p
Externí odkaz:
https://doaj.org/article/3d9c68aa568241beb6cf0c03bd59b4f2
Publikováno v:
IEEE Photonics Journal, Vol 12, Iss 4, Pp 1-8 (2020)
We experimentally demonstrate excitation of orbital angular momentum states in an air-core fiber by a silicon integrated vortex beam emitter which is designed and fabricated to match the modes supported by the fiber. The coupling loss is measured to
Externí odkaz:
https://doaj.org/article/be446f9476714d678e792cdba4230ea7
Autor:
Xiaodong Shi, Weichen Fan, Anders Kragh Hansen, Mingjun Chi, Ailun Yi, Xin Ou, Karsten Rottwitt, Haiyan Ou
Publikováno v:
Advanced Photonics Research, Vol 2, Iss 10, Pp n/a-n/a (2021)
4H‐silicon carbide (SiC) integrated platforms have shown great potential in quantum and nonlinear photonics. However, the thermal properties of 4H‐SiC waveguides are still unknown, even though thermo‐optic effects can play an important role in
Externí odkaz:
https://doaj.org/article/b8595a60972540e08c21373f38639dd1
Polarization and spatial mode dependent four-wave mixing in a 4H-silicon carbide microring resonator
Autor:
Xiaodong Shi, Weichen Fan, Yaoqin Lu, Anders Kragh Hansen, Mingjun Chi, Ailun Yi, Xin Ou, Karsten Rottwitt, Haiyan Ou
Publikováno v:
APL Photonics, Vol 6, Iss 7, Pp 076106-076106-7 (2021)
We report four-wave mixing with different polarization and spatial modes in a single 4H-silicon carbide photonic device. Our device shows great potential to perform high-dimensional multiplexing for optical communication and high-dimensional entangle
Externí odkaz:
https://doaj.org/article/a32e0ab604ff432ebc10f4b68e6b5399
Autor:
Kai Guo, Jesper. B. Christensen, Xiaodong Shi, Erik. N. Christensen, Li Lin, Yunhong Ding, Haiyan Ou, Karsten Rottwitt
Publikováno v:
IEEE Photonics Journal, Vol 10, Iss 1, Pp 1-8 (2018)
We propose a silicon strip waveguide structure with alumina thin-film coating in-between the core and the cladding for group-velocity dispersion tailoring. By carefully designing the core dimension and the coating thickness, a spectrally-flattened ne
Externí odkaz:
https://doaj.org/article/e09328aa713e4fcba452652b6a443a39
Autor:
Yunhong Ding, Davide Bacco, Kjeld Dalgaard, Xinlun Cai, Xiaoqi Zhou, Karsten Rottwitt, Leif Katsuo Oxenløwe
Publikováno v:
npj Quantum Information, Vol 3, Iss 1, Pp 1-7 (2017)
Silicon chip-to-chip high-dimensional quantum key distribution Quantum key distribution (QKD) enables ultimate secure communication guaranteed by quantum mechanics. Most of QKD systems are based on binary encoding utilizing bulky, discrete, and expen
Externí odkaz:
https://doaj.org/article/fe94ddd3734b418dad179482033d86a5
Publikováno v:
APL Photonics, Vol 4, Iss 3, Pp 030802-030802-10 (2019)
Raman scattering among conventional linearly polarized (LP) modes in single mode optical fibers is generally accepted as a promising way to achieve distributed amplification due to the fact that Raman amplification may provide gain at any wavelength,
Externí odkaz:
https://doaj.org/article/b0314974bb084fda94ad18f337014685
Autor:
Lars Gruner-Nielsen, Michael Stubert Berger, Mads Nielsen, Neethu Mariam Mathew, Karsten Rottwitt
Publikováno v:
Grüner-Nielsen, L, Berger, M S, Nielsen, M, Mathew, N M & Rottwitt, K 2022, ' A Converter for Transmission With Singlemode Performance on OM2/3/4/5 Multimode Fibers ', IEEE Photonics Technology Letters, vol. 34, no. 11, 9767850, pp. 571-574 . https://doi.org/10.1109/LPT.2022.3172487
A converter from a singlemode fiber to the fundamental mode of an OM2, OM3, OM4, or OM5 type multimode fiber is presented and is used to transmit 100 GbE with no detected errors over 1600 m multimode fiber using commercial transceivers. The converter
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d02e10bc2494189e807ddf0b8e7f39e3
https://doi.org/10.1109/lpt.2022.3172487
https://doi.org/10.1109/lpt.2022.3172487
Publikováno v:
Koefoed, J G, Müller, R R & Rottwitt, K 2022, ' Mode-Entanglement in Silicon Waveguides Through Intermodal Four-Wave Mixing ', IEEE Journal of Selected Topics in Quantum Electronics, vol. 29, no. 1, 9964077 . https://doi.org/10.1109/JSTQE.2022.3224812
Silicon photonics is rapidly emerging as a promising, scalable platform for quantum information applications. As the technology matures, sources of high-quality quantum-optical states are increasingly important. We discuss the use of intermodal four-
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5e29059857fda726f1e9c6a473b48d8d
https://doi.org/10.1109/jstqe.2022.3224812
https://doi.org/10.1109/jstqe.2022.3224812