Zobrazeno 1 - 10
of 33
pro vyhledávání: '"U, Hempelmann"'
Autor:
U. Hempelmann
Publikováno v:
IEEE Journal of Quantum Electronics. 35:1834-1842
The local normal mode approach is employed to analyze cascaded second-harmonic generation (SHG) in directional couplers with different phase mismatches in both waveguides. The couplers are assumed to be fabricated in ferroelectric crystals, which are
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::af3692e47514671cf2287cb6f04d61fa
https://doi.org/10.1109/3.806594
https://doi.org/10.1109/3.806594
Autor:
C. Kolleck, U. Hempelmann
Publikováno v:
Journal of Lightwave Technology. 15:1906-1913
Wavelength conversion using a nonlinear optical loop mirror (NOLM) is investigated. Our interest is in considering nonreturn-to-zero (NRZ) and return-to-zero (RZ) signals with a high-duty ratio resulting in a nonlinear phase shift of the counterpropa
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::744bd5c861d2699dc2889798ccc0b954
https://doi.org/10.1109/50.633589
https://doi.org/10.1109/50.633589
Publikováno v:
Journal of Lightwave Technology. 13:1750-1759
Integrated optical TM-pass polarizers operating at wavelengths around /spl lambda/=1.5 /spl mu/m have been realized by introducing proton exchanged regions adjacent to a Ti-indiffused waveguide on X-cut, Y-propagating lithium niobate. Structural inve
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::baff2dfe8de543b3e902a94a6ad303cd
https://doi.org/10.1109/50.405320
https://doi.org/10.1109/50.405320
Akademický článek
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Publikováno v:
IEEE Photonics Technology Letters. 8:909-911
A novel integrated-optical mode stripper configuration is proposed and analyzed numerically by the BPM. Its operation is based on the coupling of all higher order modes into regions with higher refractive index adjacent to the optical waveguide. It i
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3bd1cfec2dab73b1c1939d49514282cc
https://doi.org/10.1109/68.502267
https://doi.org/10.1109/68.502267
Autor:
U. Hempelmann
Publikováno v:
LEOS 2000. 2000 IEEE Annual Meeting Conference Proceedings. 13th Annual Meeting. IEEE Lasers and Electro-Optics Society 2000 Annual Meeting (Cat. No.00CH37080).
Coupled nonlinear waveguides are important components for all-optical signal processing. Their properties depend strongly on the existence and stability of states with no power exchange between the coupled waves (stationary solutions, nonlinear modes
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::01ce98a8928261f464b9d1311f87e487
https://doi.org/10.1109/leos.2000.893907
https://doi.org/10.1109/leos.2000.893907
Publikováno v:
Deutsche Krankenpflegezeitschrift. 44(8)
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=pmid________::d6d29eb37bf0b5f812bcde6c1df2df28
https://pubmed.ncbi.nlm.nih.gov/1914880
https://pubmed.ncbi.nlm.nih.gov/1914880
Publikováno v:
Integrated Photonics Research.
We compare results obtained from two numerical methods: (i) a local normal mode (LNM) description using modes computed by the finite-element method (FEM), and (ii) a three-dimensional beam-propagation method (BPM) for the analysis of a passive integr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::57fc57074409300ec9cb2793253729fb
https://doi.org/10.1364/ipr.1990.mg2
https://doi.org/10.1364/ipr.1990.mg2
Publikováno v:
Journal of the Optical Society of America B. 14:1361
The wave propagation in symmetric, nonlinear, integrated-optical Y junctions is investigated with consideration of the nonlinear polarization coupling. The propagation of the field in the waveguide structure is described by a coupled pair of nonlinea
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::50e1bfb7be8779fbb7ca08c8ca3db924
https://doi.org/10.1364/josab.14.001361
https://doi.org/10.1364/josab.14.001361
Autor:
U. Hempelmann
Publikováno v:
Journal of the Optical Society of America B. 12:77
The interaction of two initially parallel spatial optical solitons is analyzed numerically, with consideration of the nonlinear polarization coupling in a planar slab waveguide. The phase difference of the soliton pair associated with the TE and the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f746512e31174ef4209bb1db29613e8b
https://doi.org/10.1364/josab.12.000077
https://doi.org/10.1364/josab.12.000077