Calculation of Achievable Information Rates of Long-Haul Optical Transmission Systems Using Instanton Approach

Ivkovic, M.; Djordjević, Ivan B.; Vasić, Bane

doi:10.1109/jlt.2007.893930

Cited by 27 publications

(2 citation statements)

References 18 publications

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“…More complicated signaling schemes can go beyond this limit, and will eventually be required in order to make use of the potential of the optical fiber network. Some amount of interesting work has been done on the question of the capacity limits for WDM and related systems, both analytical and numerical (see [8][9][10][11][12][13][40][41][42][43][44][45] and references therein). In particular, in [8] the spectral efficiency predicted is about 8.5bits/sec/Hz, in the absence of jitter.…”

Section: Optical Fiber Channel Capacitymentioning

confidence: 99%

Transmission of information via the non-linear Scroedinger equation: The random Gaussian input case

Kazakopoulos¹,

Moustakas²

2012

Preprint

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The explosion of demand for ultra-high information transmission rates over the last decade has necessitated the usage of increasingly high light intensities for fiber optical transmissions. As a result, the fiber non-linearities need to be treated non-perturbatively. Similar analyses in the past have focused on the effects of non-linearities on existing transmission technologies, e.g. WDM.In this paper we take advantage of the fact that, under certain assumptions, light transmission through optical fibers can be described using the non-linear Schroedinger equation, which is exactly integrable. As a particular example, we show that in the low Gaussian noise limit, the Gaussian input distribution has a higher mutual information than the transmission using WDM over the same available bandwidth.

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Section: Optical Fiber Channel Capacitymentioning

confidence: 99%

Transmission of information via the non-linear Scroedinger equation: The random Gaussian input case

Kazakopoulos¹,

Moustakas²

2012

Preprint

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“…As data rates transmitted over the optical fiber increase, a fundamental question about physical limitations of optical fiber arises. The problem of determining capacity of optical transmission systems has been addressed by numerous researchers [1][2][3][4][5][6][7][8] . The main approach, until recently, was to consider amplified spontaneous emission (ASE) noise as a predominant effect and to observe the fiber nonlinearities as the perturbation of linear case 1,2 or as the multiplicative noise 3 .…”

Section: Introductionmentioning

confidence: 99%

On the channel capacity of multilevel modulation schemes with coherent detection

Djordjević

Wang

2009

SPIE Proceedings

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We describe a method to determine the channel capacity of an arbitrary multilevel modulation scheme by modeling the fiber-optic channel as a dynamical nonlinear ISI channel with memory. We also propose a multilevel turbo-equalization scheme that is able closely to approach the channel capacity. We show that with this scheme we are able straightforwardly to upgrade currently installed 10 Gb/s optical transmission systems to 100 Gb/s, and even with small memory assumption we are able to achieve 100 Gb/s per DWDM channel transmission over 9600 km.

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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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Calculation of Achievable Information Rates of Long-Haul Optical Transmission Systems Using Instanton Approach

Cited by 27 publications

References 18 publications

Transmission of information via the non-linear Scroedinger equation: The random Gaussian input case

Transmission of information via the non-linear Scroedinger equation: The random Gaussian input case

On the channel capacity of multilevel modulation schemes with coherent detection

Advanced Lightwave Systems

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