Zobrazeno 1 - 10
of 89
pro vyhledávání: '"B. Nebendahl"'
Autor:
D. Hillerkuss, T. Schellinger, M. Jordan, C. Weimann, F. Parmigiani, B. Resan, K. Weingarten, S. Ben-Ezra, B. Nebendahl, C. Koos, W. Freude, J. Leuthold
Publikováno v:
IEEE Photonics Journal, Vol 5, Iss 5, Pp 7201011-7201011 (2013)
This paper introduces a spectral slicing technique that extends the useful spectral range of frequency combs generated through self-phase modulation (SPM) of mode-locked laser pulses. When generating frequency combs by SPM, the spectral range with hi
Externí odkaz:
https://doaj.org/article/376c266939e948c4a50cf6310516ba83
Autor:
P C, Schindler, R, Schmogrow, S, Wolf, B, Baeuerle, B, Nebendahl, C, Koos, W, Freude, J, Leuthold
Publikováno v:
Optics express. 22(9)
We demonstrate full flex-grid operation with Nyquist frequency division multiplexing. The technique supports high spectral efficiency, asynchronous operation of channels, variable channel loading with different modulation formats and dynamic bandwidt
Publikováno v:
Optics express. 22(8)
Efficient algorithms for timing, carrier frequency and phase recovery of Nyquist and OFDM signals are introduced and experimentally verified. The algorithms exploit the statistical properties of the received signals to efficiently derive the optimum
Autor:
R, Schmogrow, M, Meyer, P C, Schindler, B, Nebendahl, M, Dreschmann, J, Meyer, A, Josten, D, Hillerkuss, S, Ben-Ezra, J, Becker, C, Koos, W, Freude, J, Leuthold
Publikováno v:
Optics express. 22(1)
We demonstrate two efficient processing techniques for Nyquist signals, namely computation of signals using dynamic precision as well as arbitrary rational oversampling factors. With these techniques along with massively parallel processing it become
Akademický článek
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Akademický článek
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Autor:
B. Nebendahl, W. Freude, C. Koos, J. Leuthold, M. Huebner, R. Schmogrow, A. Josten, D. Hillerkuss, S. Koenig, M. Winter, J. Meyer, M. Dreschmann
Publikováno v:
2013 Saudi International Electronics, Communications and Photonics Conference.
The quality of optical signals is a very important parameter in optical communications. Several metrics are in common use, like optical signal-to-noise power ratio (OSNR), Q-factor, error vector magnitude (EVM) and bit error ratio (BER). A measured r
Autor:
R, Schmogrow, D, Hillerkuss, S, Wolf, B, Bäuerle, M, Winter, P, Kleinow, B, Nebendahl, T, Dippon, P C, Schindler, C, Koos, W, Freude, J, Leuthold
Publikováno v:
Optics express. 20(6)
We demonstrate for the first time transmission of 54 Gbit/s and 48 Gbit/s over 44 km and 150 km, respectively, utilizing an optical bandwidth of only 3 GHz. We used polarization division multiplexed 512QAM and 256QAM modulation formats in combination
Autor:
R, Schmogrow, M, Winter, M, Meyer, D, Hillerkuss, S, Wolf, B, Baeuerle, A, Ludwig, B, Nebendahl, S, Ben-Ezra, J, Meyer, M, Dreschmann, M, Huebner, J, Becker, C, Koos, W, Freude, J, Leuthold
Publikováno v:
Optics express. 20(1)
Nyquist sinc-pulse shaping provides spectral efficiencies close to the theoretical limit. In this paper we discuss the analogy to optical orthogonal frequency division multiplexing and compare both techniques with respect to spectral efficiency and p
Publikováno v:
Physica C: Superconductivity. 219:233-240
It is shown that the shape of the field-modulated microwave-absorption signal in the mixed state of type-II superconductors reveals the field dependence of the flux-pinning parameters. Experimental data are presented for thin films of YBa 2 Cu 3 O 7