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Träfflista för sökning "L773:0733 8724 ;pers:(Lundström Carl 1982)"

Sökning: L773:0733 8724 > Lundström Carl 1982

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1.
  • Lu, Guo-Wei, 1976, et al. (författare)
  • Format Conversion of Optical Multilevel Signals Using FWM-Based Optical Phase Erasure
  • 2011
  • Ingår i: Journal of Lightwave Technology. - 0733-8724 .- 1558-2213. ; 29:16, s. 2460-2466
  • Tidskriftsartikel (refereegranskat)abstract
    • An optical format conversion scheme of multilevel phase-shift keying (M-ary PSK) signals using the four-wave mixing based optical phase erasure is discussed in this paper. The conversion from differential quadrature phase-shift keying (DQPSK) to differential phase shift keying at 10 and 160 Gbaud, and the conversion from differential eight-ary phase-shift keying to DQPSK at 40 Gbaud have been experimentally demonstrated. The proposed scheme could be used as a phase erasure, in which a redundant tributary of the M-ary PSK signal is removed, or as an "updater" where the unwanted phase pattern is replaced with the new pattern.
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2.
  • Olsson, Samuel L I, 1984, et al. (författare)
  • Phase-Sensitive Amplified Transmission Links for Improved Sensitivity and Nonlinearity Tolerance
  • 2015
  • Ingår i: Journal of Lightwave Technology. - 0733-8724 .- 1558-2213. ; 33:3, s. 710-721
  • Tidskriftsartikel (refereegranskat)abstract
    • In this paper we investigate the properties of transmission links amplified by phase-sensitive amplifiers (PSAs). Using an analytic description we explain the principles enabling improved sensitivity compared to conventional links amplified by phase-insensitive amplifiers (PIAs) and mitigation of nonlinear transmission distortions. We demonstrate these features using numerical simulations and in particular we show the possibility of efficiently mitigating both self-phase modulation (SPM) induced distortions and nonlinear phase noise (NLPN) if the link dispersion map is optimized. The properties of the noise on signal and idler are important and to enable NLPN mitigation the noise must be correlated at the link input. We investigate the role of the dispersion map in detail and show that in a link with standard single mode fiber (SSMF) the optimum dispersion map for efficient nonlinearity mitigation corresponds to pre-compensation of an amount equal to the effective loss length. Furthermore, we experimentally demonstrate both improved sensitivity and mitigation of nonlinearities in a 105 km PSA-amplified link transmitting 10 GBd 16-ary quadrature amplitude modulation (16QAM) data. We measure a combined effect allowing for more than 12 dB larger span loss in a PSA-amplified link compared to a conventional PIA-amplified link to reach the same bit error ratio (BER) of 1×10-3.
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