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Träfflista för sökning "WFRF:(Sjödin Martin E 1983) "

Sökning: WFRF:(Sjödin Martin E 1983)

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1.
  • Li, Jianqiang, 1983, et al. (författare)
  • Building up low-complexity spectrally-efficient Terabit superchannels by receiver-side duobinary shaping
  • 2012
  • Ingår i: Optics Express. - 1094-4087 .- 1094-4087. ; 20:9, s. 10271-10282
  • Tidskriftsartikel (refereegranskat)abstract
    • Recently, an increasing interest has been put on spectrally-efficient multi-carrier superchannels for beyond 100G. Apart from orthogonal frequency-division multiplexing (OFDM) and Nyquist wavelength-division multiplexing (WDM), another low-complexity WDM approach based on transmitter-side pre-filtering and receiver-side duobinary shaping is proposed to build up multi-carrier superchannels. This approach is referred to as receiver-side duobinary-shaped WDM (RS-DBS-WDM). Generation and transmission of a 1.232-Tbit/s 11-carrier superchannel is experimentally demonstrated. The superchannel signal can be well fit inside the passband of multiple 300-GHz reconfigurable optical add and drop multiplexers (ROADMs). In the superchannel scenario, the proposed RS-DBS-WDM is qualitatively compared with OFDM and Nyquist-WDM in terms of implementation complexity. In sum, the proposed RS-DBS-WDM approach features high transceiver analog-bandwidth efficiency, high spectral-efficiency, the absence of specific spectral manipulation, compatibility with conventional WDM technologies and coherent detection algorithms, and comparable implementation penalty.
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2.
  • Olsson, Samuel L I, 1984, et al. (författare)
  • Phase-Sensitive Amplified Optical Link Operating in the Nonlinear Transmission Regime
  • 2012
  • Ingår i: 38th European Conference on Optical Communication and Exhibition, ECOC 2012, Amsterdam, 16-20 September 2012.
  • Konferensbidrag (refereegranskat)abstract
    • We characterize a phase-sensitive amplifier (PSA) after an 80km fiber span, carrying a single DQPSK channel in the nonlinear transmission regime. The system penalty with increasing intrachannel nonlinear distortion is similar for EDFA and PSA based systems, indicating that the PSA sensitivity advantage remain with nonlinear transmission.
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3.
  • Sjödin, Martin E, 1983, et al. (författare)
  • Comparison of 128-SP-QAM with PM-16-QAM
  • 2012
  • Ingår i: Optics Express. - 1094-4087 .- 1094-4087. ; 20:8, s. 8356-8366
  • Tidskriftsartikel (refereegranskat)abstract
    • In this paper we investigate an interesting modulation format for fiber optic communications, set-partitioning 128 polarization-multiplexed 16-QAM (128-SP-QAM), which consists of the symbols with even parity from the symbol alphabet of polarization-multiplexed 16-QAM (PM-16-QAM). We compare 128-SP-QAM and PM-16-QAM using numerical simulations in long-haul transmission scenarios at bit rates of 112 Gbit/s and 224 Gbit/s, and at the same symbol rates (14 and 28 Gbaud). The transmission link is made up of standard single-mode fiber with 60, 80 or 100 km amplifier spacing and both single channel and WDM transmission (25- and 50 GHz-spaced) is investigated. The results show that 128-SP-QAM achieves more than 40% increase in transmission reach compared to PM-16-QAM at the same data rate for all cases studied for a bit error rate of 10−3. In addition, we find that in single channel transmission there is, as expected, an advantage in terms of transmission distance when using a data rate of 112 Gbit/s as compared to 224 Gbit/s. However, when comparing the two different WDM systems with the same aggregate data rates, the reach is similar due to the smaller impact of nonlinear crosstalk between the WDM channels in the systems with 50 GHz spacing. We also discuss decoding and phase estimation of 128-SP-QAM and implement differential coding, which avoids error bursts due to cycle slips in the phase estimation. Simulations including laser phase noise show that the phase noise tolerance is similar for the two formats, with 0.5 dB OSNR penalty compared to the case with zero phase noise for a laser linewidth to symbol rate ratio of 10−4.
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4.
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5.
  • Ellis, A. D., et al. (författare)
  • Future Directions to Realize Ultra-High Bit-Rate Transmission Systems
  • 2010
  • Ingår i: Proceedings of OptoElectronics and Communications Conference, OECC 2010, Sapporo, Japan, 5-9 July 2010, invited paper..
  • Konferensbidrag (övrigt vetenskapligt/konstnärligt)abstract
    • In this paper we examine two potential future directions for the realization of ultra-high bit rate transmission systems.
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6.
  • Eriksson, Tobias, 1986, et al. (författare)
  • Comparison of 128-SP-QAM and PM-16QAM in long-haul WDM transmission
  • 2013
  • Ingår i: Optics Express. - 1094-4087 .- 1094-4087. ; 21:16, s. 19269-19279
  • Tidskriftsartikel (refereegranskat)abstract
    • We investigate 128-level set-partitioning quadrature amplitude modulation (128-SP-QAM) experimentally and compare the performance to polarization-multiplexed 16QAM both at the same bit rate and at the same symbol rate. Using a recirculating loop we study both single channel and wavelength-division multiplexing (WDM) transmission and demonstrate a reach of up to 2680 km at a bit-error rate of 10−3 for 128-SP-QAM. We confirm that 128-SP-QAM has an increased sensitivity compared to PM-16QAM and show that the maximum transmission distance can be increased by more than 50 % at the same bit rate for both single channel and WDM transmission. We also investigate the performance at the same symbol rate as a possible fall back solution in a degrading link.
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7.
  • Eriksson, Tobias, 1986, et al. (författare)
  • Experimental Demonstration of 128-SP-QAM in Uncompensated Long-Haul Transmission
  • 2013
  • Ingår i: 2012 Optical Fiber Communication Conference and Exposition and the National Fiber Optic Engineers Conference, OFC/NFOEC 2013, Anaheim, 17-21 March 2013. - 9781479904570 ; , s. OTu3B.2-
  • Konferensbidrag (refereegranskat)abstract
    • We demonstrate 128-SP-QAM experimentally for the first time and compare the performance to PM-16QAM at the same symbol rate (10.5 Gbaud). We find a 1.7 dB increased sensitivity and 50% increased transmission reach over PM-16QAM.
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8.
  • Eriksson, Tobias, 1986, et al. (författare)
  • Frequency and polarization switched QPSK
  • 2013
  • Ingår i: 39th European Conference and Exhibition on Optical Communication, ECOC 2013; London; United Kingdom; 22 September 2013 through 26 September 2013. - : Institution of Engineering and Technology. - 9781849197595 ; 2013:622 CP, s. 816-818
  • Konferensbidrag (refereegranskat)abstract
    • We propose 8-dimensional biorthogonal modulation as a format with 3 dB increased asymptotic power efficiency over PM-QPSK. We demonstrate one possible experimental implementation of this format based on frequency and polarization switching and compare with dual-carrier PM-QPSK and PS-QPSK.
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9.
  • Johannisson, Pontus, 1976, et al. (författare)
  • A Modified CMA for PS-QPSK
  • 2011
  • Ingår i: Advanced Photonics, Signal Processing in Photonic Communications. - Washington, D.C. : OSA. - 9781557529138 - 9781557529138
  • Konferensbidrag (refereegranskat)abstract
    • A modified constant modulus algorithm (CMA) is presented that allows polarization demultiplexing of polarization-switched QPSK. The suggested algorithm has been found to work well on both numerical and experimental data.
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10.
  • Johannisson, Pontus, 1976, et al. (författare)
  • Cancellation of Nonlinear Phase Distortion in Self-Homodyne Coherent Systems
  • 2010
  • Ingår i: IEEE Photonics Technology Letters. - 1041-1135 .- 1941-0174. ; 22:11, s. 802-804
  • Tidskriftsartikel (refereegranskat)abstract
    • Using the self-homodyne detection scheme it is possible to compensate for the nonlinear phase distortion that, if left uncompensated, would distort the received constellation diagram. The suggested compensation method is evaluated using numerical simulations and validated in an experiment.
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  • Resultat 1-10 av 33
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Agrell, Erik, 1965 (12)
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Phelan, Richard (3)
Dasgupta, Sonali (3)
Petropoulos, P. (3)
Lu, Guo-Wei, 1976 (3)
Sköld, Mats, 1977 (2)
Zhao, Jian (2)
Li, Jianqiang, 1983 (2)
Herstrøm, Søren (2)
Syvridis, Dimitri (2)
Wada, N. (2)
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Karout, Johnny, 1985 (1)
Peng, Fangrong, 1986 (1)
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