All optical discrete Fourier transform processor for 100 Gbps OFDM transmission

Lee, Kyusang; Thai, Chan T D; Rhee, June-Koo Kevin

doi:10.1364/oe.16.004023

Cited by 88 publications

(42 citation statements)

References 10 publications

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“…One of the crucial requirements for successfully deploying [9]. These two DFT approaches can form two distinct OFDM super-channel receiver models as partial carrier demultiplexers for subband demultiplexing.…”

Section: Introductionmentioning

confidence: 99%

Terabit-Per-Second Optical Super-Channel Receiver Models for Partial Demultiplexing of an OFDM Spectrum

Reza¹,

Rhee²

2015

Journal of the Optical Society of Korea

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Terabit-per-second (Tb/s) transmission capacity for the next generation of long-haul communication networks can be achieved using multicarrier optical super-channel technology. In an elastic orthogonal frequency division multiplexing (OFDM) super-channel transmission system, demultiplexing a portion of an entire spectrum in the form of a subband with minimum power is critically required. A major obstacle to achieving this goal is the analog-to-digital converter (ADC), which is power-hungry and extremely expensive. Without a proper ADC that can work with low power, it is unrealistic to design a 100G coherent receiver suitable for a commercially deployable optical network. Discrete Fourier transform (DFT) is often seen as a primary technique for understanding partial demultiplexing, which can be attained either optically or electronically. If fairly comparable performance can be achieved with an all-optical DFT circuit, then a solution independent of data rate and modulation format can be obtained. In this paper, we investigate two distinct OFDM super-channel receiver models, based on electronic and all-optical DFT-technologies, for partial carrier demultiplexing in a multi-Tb/s transmission system. The performance comparison of the receivers is discussed in terms of bit-error-rate (BER) performance.

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Section: Introductionmentioning

confidence: 99%

Terabit-Per-Second Optical Super-Channel Receiver Models for Partial Demultiplexing of an OFDM Spectrum

Reza¹,

Rhee²

2015

Journal of the Optical Society of Korea

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“…In addition, they are more spectrally efficient than wavelength division multiplexing (WDM) techniques, since they employ the orthogonality property of subcarriers [6]. Moreover, OFDM engenders many advantages, such as immunity to chromatic dispersion (CD) and polarization mode dispersion (PMD) in radio-over-fiber transmission systems [12][13][14][15][16][17]. On the other hand, OFDM techniques suffer from high peak-to-average power ratios and are more sensitive to both carrier frequency offset and phase noise (PN) [2,18].…”

Section: Introductionmentioning

confidence: 99%

Proposal and Performance Evaluation of an Efficient RZ-DQPSK Modulation Scheme in All-Optical OFDM Transmission Systems

Mirnia

Zarei

Emami

et al. 2013

J. Opt. Commun. Netw.

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Abstract-A return-to-zero differential quadrature phase-shift keying (DQPSK) modulation scheme is proposed for all-optical orthogonal frequency-division multiplexing transmission systems. The system uses coupler-based inverse fast Fourier transform/fast Fourier transform to support a 700 km single-mode fiber link and a transmission rate of 40 Gb∕s without any nonlinear compensation. The performance of the proposed system is evaluated using simulation and four performance measures are obtained, namely, the eye diagram, the eyeopening penalty (EOP), the power spectral broadening, and the bit error rate (BER). The effect of self-phase modulation is taken into account in the performance evaluation. In addition, the performance of the proposed system is compared to that of a traditional one adopting a non-return-to-zero DQPSK scheme. Our results reveal that the proposed system outperforms the traditional one in all four aforementioned performance measures, yet the spectral efficiency is almost preserved. Specifically, for an input average power of 12 dBm, a reduction in both the required optical-signal-to-noise ratio of about 4 dB (to achieve a BER of 10 −6 ) and the EOP of about 5 dB are reported when adopting the proposed system, as compared to the traditional one.Index Terms-All-optical OFDM; Eye diagram; Fiber optic nonlinearity; Non-return-to-zero differential quadrature phase-shift keying (NRZ-DQPSK); Return-to-zero differential quadrature phase-shift keying (RZ-DQPSK); Selfphase modulation (SPM).

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“…All-optical OFDM has attracted much attention recently, for its advantage of eliminating processing speed limitation set by electronics [4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

“…Detectors demodulate data in every sub-carrier after EAM sampling. The EAMs work as optical time gates, whose on-state is 1/N of an OFDM symbol's duration and off-state is the rest of an OFDM symbol's duration [4]. The parallel to serial processor (P/S) combines multiple parallel electronic data streams into a serial data stream.…”

Section: Introductionmentioning

confidence: 99%

PAPR Reduction in All-optical OFDM Systems Based on Phase Pre-emphasis

Tao³

et al. 2011

J. Phys.: Conf. Ser.

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Abstract. This paper investigates the peak-to-average power ratio (PAPR) theory in all-optical orthogonal frequency division multiplexing (OFDM) optical fibre communication systems. We find out that phase pre-emphasis could effectively reduce PAPR in all-optical OFDM communication systems which employ intensity modulation-direct detection (IM-DD) method. An equation is developed and proposed to calculate suitable phasing values for pre-emphasis. Furthermore, we find out that phase pre-emphasis cannot reduce PAPR effectively in all-optical OFDM systems that employ Phase Shift Keying (PSK) or Quadracture Amplitude Modulation (QAM) method.

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All optical discrete Fourier transform processor for 100 Gbps OFDM transmission

Cited by 88 publications

References 10 publications

Terabit-Per-Second Optical Super-Channel Receiver Models for Partial Demultiplexing of an OFDM Spectrum

Terabit-Per-Second Optical Super-Channel Receiver Models for Partial Demultiplexing of an OFDM Spectrum

Proposal and Performance Evaluation of an Efficient RZ-DQPSK Modulation Scheme in All-Optical OFDM Transmission Systems

PAPR Reduction in All-optical OFDM Systems Based on Phase Pre-emphasis

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