121.9-Gb/s PDM-OFDM Transmission With 2-b/s/Hz Spectral Efficiency Over 1000 km of SSMF

Jansen, S.L.; Morita, Itsuro; Schenk, T.C.W.; Tanaka, Hideaki

doi:10.1109/jlt.2008.2007972

Cited by 244 publications

(117 citation statements)

References 21 publications

(47 reference statements)

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“…2. The extension to the case of polarization multiplexing is straightforward and can be found in [25], [26].…”

Section: B Ofdmmentioning

confidence: 99%

“…The optical channel does not entail any changes in the principles of the OFDM technique-the use of polarization multiplexing simply implies the adoption of a couple of OFDM transmitters and a couple of FFT blocks at the receiver with a two-dimensional 1-tap equalizer [25], [26]. For this reason, most of the works published on optical OFDM deal with the experimental demonstration of different approaches and solutions to overcome technological issues [26], [29]- [31].…”

Section: B Ofdmmentioning

confidence: 99%

“…The only way to implement a 100 Gbps optical OFDM transmission is therefore the parallelization of transmit (and potentially receive) architecture, so that less stringent bandwidth requirements can be managed by existing optical components. In this direction, some works have been published, addressing theoretical and experimental subcarrier multiplexing (SCM), or multi-band OFDM, [26] and orthogonal-band multiplexing (OBM) [29], [33]. Basically, the technological limit is overcome by multiplexing different OFDM sub-signals and reducing the guard-bands between sub-bands by exploiting subcarrier orthogonality between different sub-bands, in the same way it is exploited in a single OFDM frame, thus significantly reducing intercarrier interference.…”

Section: B Ofdmmentioning

confidence: 99%

“…Here, the overall data stream is split into several orthogonal sub-blocks for separate OFDM modulations, each centered at different wavelengths, with a proper choice of frequency offsets in order to exploit the orthogonality of subcarriers across different sub-blocks. These techniques clearly weigh on the cost and on the complexity of the system, both at the transmitter and at the receiver, depending on the choice of multiplexing the sub-bands directly in the optical domain or using an intermediate frequency (IF) conversion stage, in the electrical domain [26].…”

Section: B Ofdmmentioning

confidence: 99%

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OFDM versus Single-Carrier Transmission for 100 Gbps Optical Communication

Barbieri

Colavolpe

Foggi

et al. 2010

J. Lightwave Technol.

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Abstract-We analyze the orthogonal frequency division multiplexing (OFDM) technique in long-haul next generation optical communication links and compare it with the well-established single-carrier (SC) data transmission using high-level modulation formats and coherent detection. The analysis of the two alternative solutions is carried out in the 100 Gbps scenario, which is commonly considered to be the next upgrade of existing optical links, with special emphasis on quaternary phase-shift keying (QPSK) modulations. The comparison between OFDM and SC takes into account the main linear and nonlinear impairments of the optical channel, e.g., group velocity dispersion (GVD), polarization mode dispersion (PMD), self-phase modulation (SPM), cross-phase modulation (XPM), and four-wave mixing (FWM), as well as the phase noise due to transmit and receive lasers, their relative frequency offset, other synchronization aspects, the overall complexity, the power and spectral efficiency, and the technological constraints.Index Terms-Cross-phase modulation (XPM), four-wave mixing (FWM), group velocity dispersion (GVD), optical coherent transmission systems, orthogonal frequency division multiplexing (OFDM), phase-shift keying (PSK), polarization mode dispersion (PMD), self-phase modulation (SPM), single-carrier transmissions.

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“…2. The extension to the case of polarization multiplexing is straightforward and can be found in [25], [26].…”

Section: B Ofdmmentioning

confidence: 99%

Section: B Ofdmmentioning

confidence: 99%

Section: B Ofdmmentioning

confidence: 99%

Section: B Ofdmmentioning

confidence: 99%

See 2 more Smart Citations

OFDM versus Single-Carrier Transmission for 100 Gbps Optical Communication

Barbieri

Colavolpe

Foggi

et al. 2010

J. Lightwave Technol.

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“…Blind channel estimation requires careful design of the channel estimation algorithm so that the system converges under all conditions, whereas the main disadvantage of TS-based channel estimation is that the overhead is increased by about 8% for an optimally designed system configuration [5]. With respect to single-carrier modulation formats, the use of OFDM offers some distinct advantages.…”

Section: Introductionmentioning

confidence: 99%

132.2-Gb/s PDM-8QAM-OFDM Transmission at 4-b/s/Hz Spectral Efficiency

Jansen

Amin

Takahashi

et al. 2009

IEEE Photon. Technol. Lett.

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Abstract-In this letter, we investigate 132.2-Gb/s polarizationdivision-multiplexed orthogonal frequency-division-multiplexing (PDM-OFDM) transmission at 25-GHz channel spacing. We show that the nonlinear tolerance is dependent on the OFDM symbol length. By using 14.4-ns-long OFDM symbols, 7 132.2-Gb/s transmission of PDM-OFDM at 4-b/s/Hz spectral efficiency is reported over 1300-km standard single-mode fiber.Index Terms-Chromatic dispersion compensation, fast Fourier transform (FFT), long-haul transmission, orthogonal frequencydivision multiplexing (OFDM).

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Advanced Lightwave Systems

Agrawal¹

2010

Fiber‐Optic Communication Systems

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Lightwave systems discussed so far are based on a simple digital modulation scheme in which an electrical binary bit stream modulates the intensity of an optical carrier inside an optical transmitter (on-off keying or OOK). The resulting optical signal, after its transmission through the fiber link, falls directly on an optical receiver that converts it to the original digital signal in the electrical domain. Such a scheme is referred to as intensity modulation with direct detection (IM/DD). Many alternative schemes, well known in the context of radio and microwave communication systems [l]-[3], transmit information by modulating both the amplitude and the phase of a carrier wave. Although the use of such modulation formats for optical systems was considered in the 1980s [4]-[9], it was only after the year 2000 that phase modulation of optical carriers attracted renewed attention, motivated mainly by its potential for improving the spectral efficiency of WDM systems [10]- [16]. Depending on the receiver design, such systems can be classified into two categories. In coherent lightwave systems [14], transmitted signal is detected using homodyne or heterodyne detection requiring a local oscillator. In the so-called self-coherent systems [16], the received signal is first processed optically to transfer phase information into intensity modulations and then sent to a direct-detection receiver.The motivation behind using phase encoding is two-fold. First, the sensitivity of optical receivers can be improved with a suitable design compared with that of direct detection. Second, phase-based modulation techniques allow a more efficient use of fiber bandwidth by increasing the spectral efficiency of WDM systems. This chapter pays attention to both aspects. Section 10.1 introduces new modulation formats and the transmitter and receiver designs used to implement them. Section 10.2 focuses on demodulation techniques employed at the receiver end. The bit-error rate (BER) is considered in Section 10.3 for various modulation formats and demodulation schemes. Section 10.4 focuses on the degradation of receiver sensitivity through mechanisms such as phase noise, intensity noise, polarization mismatch, and fiber dispersion. Nonlinear phase noise is discussed in Section 10.5 together with the techniques used for its compensation. Section 10.6 reviews the recent progress realized with emphasis on improvements in the spectral efficiency. The topic of ultimate channel capacity is the focus of Section 10.7.

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121.9-Gb/s PDM-OFDM Transmission With 2-b/s/Hz Spectral Efficiency Over 1000 km of SSMF

Cited by 244 publications

References 21 publications

OFDM versus Single-Carrier Transmission for 100 Gbps Optical Communication

OFDM versus Single-Carrier Transmission for 100 Gbps Optical Communication

132.2-Gb/s PDM-8QAM-OFDM Transmission at 4-b/s/Hz Spectral Efficiency

Advanced Lightwave Systems

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