Transmission of 25-Gb/s RZ-DQPSK signals with 25-GHz channel spacing over 1000 km of SMF-28 fiber

Cho, P.S.; Grigoryan, V.S.; Godin, Y.; Salamon, A.; Achiam, Y.

doi:10.1109/lpt.2002.807934

Cited by 80 publications

(38 citation statements)

References 9 publications

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“…3 Advanced modulation formats, such as differential quadrature phase-shift keying (DQPSK) 4,5 and differential 8-ary phase-shift keying (D8PSK), 6 have already been demonstrated. Among various modulation formats that carry 2 bits of information per symbol, quadrature phase-shift keying (QPSK) is the most promising one because of its superior transmission characteristics.…”

Section: Introductionmentioning

confidence: 99%

Generation and coherent detection of QPSK signal using a novel method of digital signal processing

Zhao

et al. 2018

Mod. Phys. Lett. B

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We demonstrate an optical quadrature phase-shift keying (QPSK) signal transmitter and an optical receiver for demodulating optical QPSK signal with homodyne detection and digital signal processing (DSP). DSP on the homodyne detection scheme is employed without locking the phase of the local oscillator (LO). In this paper, we present an extracting one-dimensional array of down-sampling method for reducing unwanted samples of constellation diagram measurement. Such a novel scheme embodies the following major advantages over the other conventional optical QPSK signal detection methods. First, this homodyne detection scheme does not need strict requirement on LO in comparison with linear optical sampling, such as having a flat spectral density and phase over the spectral support of the source under test. Second, the LabVIEW software is directly used for recovering the QPSK signal constellation without employing complex DSP circuit. Third, this scheme is applicable to multilevel modulation formats such as M -ary PSK and quadrature amplitude modulation (QAM) or higher speed signals by making minor changes.

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Section: Introductionmentioning

confidence: 99%

Generation and coherent detection of QPSK signal using a novel method of digital signal processing

Zhao

et al. 2018

Mod. Phys. Lett. B

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“…One such technique for accessing the huge bandwidth capacity in an optical link is wavelength division multiplexing (WDM). This technology puts data from different sources together in a single optical link with each signal carried at the same time on different wavelengths [14][15]. By utilizing WDM technology the connection limit of any optical system could be expanded up to several tera-hertz.…”

Section: Introductionmentioning

confidence: 99%

Role of Turbulences in WDM-Polarization Interleaving Scheme based Inter-Satellite Communication System

Chaudhary¹,

Sharma²,

Parveen³

2014

IJCA

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Inter-Satellite communication is the revolutionary technology used to transmit the signals between the satellites. This work is focused to carry out the investigation of turbulences in Inter-Satellite communication system by incorporating WDM-PI interleaving scheme. A 6 x 20 Gbps channels are transported over Inter-Satellite link having span of 1000 km to realize the total transmission of 120 Gbps. The role of transmitter pointing errors and receiving pointing errors in the OWC link is investigated and results are reported in terms of SNR, total received power and eye diagrams.

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“…The main benefit of DQPSK is the reduced spectral width, which is about half that of a binary format at the same bit rate. By 2003, DQPSK systems were sufficiently mature to allow demonstrations with good performance at bit rates above 10 Gbit/s [2,3]. This opened up a wave of experiments that have demonstrated several benefits of multilevel modulation formats.…”

Section: Introductionmentioning

confidence: 99%

Advanced Modulation Formats for Transmission Systems

Tokle

Serbay²,

Jensen

et al. 2008

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

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Transmission of 25-Gb/s RZ-DQPSK signals with 25-GHz channel spacing over 1000 km of SMF-28 fiber

Cited by 80 publications

References 9 publications

Generation and coherent detection of QPSK signal using a novel method of digital signal processing

Generation and coherent detection of QPSK signal using a novel method of digital signal processing

Role of Turbulences in WDM-Polarization Interleaving Scheme based Inter-Satellite Communication System

Advanced Modulation Formats for Transmission Systems

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