Ideal duobinary generating filter for optically amplified systems

Lyubomirsky, I.; Chien, Cheng-Chung

doi:10.1109/lpt.2006.870153

Cited by 13 publications

(9 citation statements)

References 14 publications

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“…For ODB encoding of a 10 Gbit/s signal a 3 GHz Bessel LPF can be used for improved receiver sensitivity [7] and for better amplified spontaneous emission (ASE) noise limited performance a 2.8 GHz Bessel LPF can be used [8].…”

Section: Duobinary Generation and Recoverymentioning

confidence: 99%

Sliceable transponders for metro-access transmission links

et al. 2015

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This paper presents a solution for upgrading optical access networks by reusing existing electronics or optical equipment: sliceable transponders using signal spectrum slicing and stitching back method after direct detection. This technique allows transmission of wide bandwidth signals from the service provider (OLT -optical line terminal) to the end user (ONU -optical network unit) over an optical distribution network (ODN) via low bandwidth equipment. We show simulation and experimental results for duobinary signaling of 1 Gbit/s and 10 Gbit/s waveforms. The number of slices is adjusted to match the lowest analog bandwidth of used electrical devices and scale from 2 slices to 10 slices. Results of experimental transmission show error free signal recovery by using post forward error correction with 7% overhead.

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Section: Duobinary Generation and Recoverymentioning

confidence: 99%

Sliceable transponders for metro-access transmission links

et al. 2015

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“…Duobinary signalling, also named as correlative coding, was initially developed in the period of electronic communications as an efficient means for reaching the Nyquist limit [19]. Duobinary modulation format is based on producing a relationship between the adjacent bits at the transmitter.…”

Section: Fig 1 Principle Of Duobinary Modulationmentioning

confidence: 99%

Duobinary Modulation Format for Optical System- A Review

Kaur¹,

Dewra²

2014

IJAREEIE

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ABSTRACT:In metropolitan optical networks, with the increasing growth and demand for capability, high bit rate transmission has recently become an important part of communication. Duobinary modulation is more efficient format for transmitting high speed optical signals over bandwidth limited channel. The duobinary modulation format for long haul and WDM transmission links is the one that has a narrow spectral width, low susceptibility to fiber nonlinearity, large dispersion tolerance and good transmission performance and has a simple and cost-effective configuration. KEYWORDS:Amplitude Shift Keying (ASK), Duobinary Modulation (DM), Mach Zender Modulator (MZM), NonReturn-to-Zero (NRZ), Phase-shift Keying (PSK), Return-to-Zero (RZ). I.INTRODUCTIONOptical duobinary format has attracted much attention in latest years, since optical duobinary signals have a higher spectral efficiency and better tolerance of chromatic dispersion than the standard non-return-to-zero (NRZ) signals due to the narrower spectral bandwidth [1]. Optical duobinary is a proficient modulation format which is known to increase the spectral efficiency [2]. Duobinary modulation format have been proposed to increase the transmission capacity by improving the bandwidth efficiency of the limited amplifier bandwidth to reduce channel spacing with the narrow spectral width of modulated signals in DWDM systems [3]. The high dispersion tolerance of this modulation scheme can eliminate the accurate dispersion compensation [4]. Due to its large dispersion tolerance, the duobinary modulation is appropriate for optical metro area networks (MANs) [5]. Its simple implementation, high chromatic dispersion tolerance and enhanced spectral efficiency are all attractive characteristics for wavelength-division-multiplexed transmission systems [6]. Duobinary modulation is an attractive candidate because it is spectrally efficient (~0.8 b/s/Hz) [7]. Compared with the standard non-return-to-zero (NRZ) format, optical duobinary modulation also has higher threshold for the onset of Stimulated Brillouin Scattering (SBS) [8]. To improve the transmission capacity, the duobinary modulation format has been very attractive due to a narrow spectral width and a high tolerance to the chromatic dispersion [9].Lender el at.[10] demonstrated a new approach to digital data transmission, termed duobinary and correlative, substantially increases speed over any band-limited media owing to correlation between signal states. Specific codes are used with or without carrier modulation. In the error detection process, it has been observed that with this type of system it is unnecessary to introduce redundant digits into the original data stream. Price and Mercier el at. [11] analysed a reduced bandwidth optical digital intensity modulation with improved chromatic dispersion tolerance. In this a simple optical modulation scheme using a lithium niobate MZ modulator driven by a three level drive waveform is proposed. The two-level intensity modulated optical signal obtained possesses a smaller ...

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“…There have been many research efforts to optimize the LPF's bandwidth in duobinary systems: at 10 Gbps receiver sensitivity has shown to be improved by employing a 3 GHz LPF [12] and better amplified spontaneous emission (ASE) noise limited performance can be achieved with 2.8 GHz [13]. As a rule of thumb, it is well known that for a duobinary signaling, fifth order low pass Bessel filters having a 3 dB bandwidth equal to the quarter of the data rate gives a satisfactory performance.…”

Section: Polybinary Generation and Recoverymentioning

confidence: 99%

Five-level polybinary signaling for 10 Gbps data transmission systems

Olmos

Suhr

et al. 2013

Opt. Express

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This paper presents a revitalization effort towards exploiting multilevel polybinary signals for spectral efficient data links. Specifically, we present five level polybinary signaling for 10 Gbps signals. By proper coding to avoid error propagation and degeneracy of the bit error rate performance, a 10Gbps polybinary signal is successfully generated employing a 1.8 GHz Bessel filter with an electrical spectral efficiency of 5.5 bit/s/Hz. The experimental results show bit error rate performances below FEC level for transmission in singlemode and dispersion shifted fibers up to 20 km length.

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Ideal duobinary generating filter for optically amplified systems

Cited by 13 publications

References 14 publications

Sliceable transponders for metro-access transmission links

Sliceable transponders for metro-access transmission links

Duobinary Modulation Format for Optical System- A Review

Five-level polybinary signaling for 10 Gbps data transmission systems

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