Optimal 40 Gb/s modulation formats for spectrally efficient long-haul DWDM systems

Hoshida, Takeshi; Vassilieva, Olga; Yamada, Kazuhiko; Choudhary, S.; Pecqueur, R.; Kuwahara, H.

doi:10.1109/jlt.2002.806761

Cited by 57 publications

(22 citation statements)

References 4 publications

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“…Equation (29) is derived under this assumption; however, in reality the branching ratio may not be ideal. Let us consider the generalized case where a fraction a of the input power enters the upper arm and the remaining fraction 1 − a of the input power enters the lower arm.…”

Section: Mach-zehnder Modulation With a Non-ideal Branching Ratiomentioning

confidence: 99%

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Advanced modulation formats for fiber optic communication systems

Mauro

Raghavan

2008

Sci Model Simul

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Choice of modulation format plays a critical role in the design and performance of fiber optic communication systems. We discuss the basic physics of electro-optic phase and amplitude modulation and derive model transfer functions for ideal and non-ideal Mach-Zehnder modulators. We describe the generation and characteristics of the standard nonreturn-to-zero (NRZ) modulation format, as well as advanced formats such as returnto-zero (RZ), carrier-suppressed RZ (CSRZ), duobinary, modified duobinary, differential phase-shift keyed (DPSK), and return-to-zero DPSK (RZ-DPSK). Finally, we discuss the relative merits of these formats with respect to a variety of system impairments.

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Section: Mach-zehnder Modulation With a Non-ideal Branching Ratiomentioning

confidence: 99%

“…The most effective way to suppress this penalty is to use a spectrally compact format such as NRZ, duobinary, modified duobinary, or DPSK. In general, as the duty cycle of the pulses decreases, the linear cross-talk penalty can be expected to increase [28][29][30].…”

Section: Linear Cross-talkmentioning

confidence: 99%

Advanced modulation formats for fiber optic communication systems

Mauro

Raghavan

2008

Sci Model Simul

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“…Optical PMD compensation is said expensive because of channel by channel compensation, while electronic compensation using coherent detection, which is described in next section, is under development stage. We understand RZ-DQPSK modulation scheme, having s a compact modulation spectrum and relatively wide PMD tolerance, has long been evaluated [2], and is already well established and proved technology [3], and is a promising solution. We studied and compared the various effects and influences and developed RZ-DQPSK transceivers [4,5].…”

Section: Gb/s Technologiesmentioning

confidence: 99%

Technologies for 40 Gb/s and 100Gb/s transmission

Kuwahara

2008

OFC/NFOEC 2008 - 2008 Conference on Optical Fiber Communication/National Fiber Optic Engineers Conference

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“…With the aid of pre compensation and post compensation, the effect of four wave mixing can also be minimized. The DWDM and pre and post compensation techniques can be employed to increase the efficiency and capacity of optical transmission systems [6]. Non Return to Zero (NRZ) and Return to Zero (RZ) are the most often modulation formats for optical transmission systems.…”

Section: Introductionmentioning

confidence: 99%

Role of Laser Linewidth in High Speed DWDM System by Incorporating Duobinary Modulation Scheme

Bansal¹,

Kaur²,

Chaudhary³

2015

IJCA

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This work is focused on realization of DWDM system of 1.6 Tb/s ultra high capacity using duobinary return to zero modulation scheme with EDFA and dispersion compensation scheme. Duo binary format is used as it is suitable for high spectral efficiency at large transmission distance. 40 channels having capacity of 40 Gbps data rate each are multiplexed with channel spacing of 100 GHz to realize 1.6 Tbps as total transmission over optical span of 60 Km by using pre and post compensation technique. The comparison of parameters is observed in terms of Q value and eye opening keeping BER in acceptable range Moreover, the role of laser line-width is also investigated to minimize the non linearity and four wave mixing effect.

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Optimal 40 Gb/s modulation formats for spectrally efficient long-haul DWDM systems

Cited by 57 publications

References 4 publications

Advanced modulation formats for fiber optic communication systems

Advanced modulation formats for fiber optic communication systems

Technologies for 40 Gb/s and 100Gb/s transmission

Role of Laser Linewidth in High Speed DWDM System by Incorporating Duobinary Modulation Scheme

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