320 Gbit/s (8 × 40 Gbit/s) WDM transmissionover 367 km with 120 km repeater spacingusing carrier-suppressed return-to-zero format

Miyamoto, Yutaka; Hirano, A.; Yonenaga, K.; Sano, Akira; Toba, H.; Murata, Koichi; Mitomi, O.

doi:10.1049/el:19991373

Cited by 141 publications

(34 citation statements)

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“…We employed two transmitters for the even and for the odd channels. by a 50/25 GHz optical interleaving filter (ILF), and then modulated by an MZ modulator (MZM) driven by a 12.5-GHz clock and biased at the null point [36]. This converted the 50-GHz spaced 25-channel signals into 25-GHz spaced 50-channel signals; higher frequency components located at ±37.5 GHz away were suppressed below 40 dB to avoid inter-channel crosstalk [11].…”

Section: 2-tbit/s 64-qam Transmission Experimentsmentioning

confidence: 99%

Ultra-High Capacity Optical Transmission Technologies for 100 Tbit/s Optical Transport Networks

Sano

Kobayashi

Yoshida

et al. 2011

IEICE Trans. Commun.

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SUMMARYThis paper describes ultra-high capacity wavelengthdivision multiplexed (WDM) transmission technologies for 100-Tbit/sclass optical transport networks (OTNs). First, we review recent advances in ultra-high capacity transmission technologies focusing on spectrallyefficient multi-level modulation techniques and ultra-wideband optical amplification techniques. Next, we describe an ultra-high capacity WDM transmission experiment, in which high speed polarization-division multiplexed (PDM) 16-ary quadrature amplitude modulation (16-QAM), generated by an optical synthesis technique, in combination with coherent detection based on digital signal processing with pilotless algorithms, realize the high spectral efficiency (SE) of 6.4 b/s/Hz. Furthermore, ultrawideband hybrid optical amplification utilizing distributed Raman amplification (DRA) and C-and extended L-band erbium-doped fiber amplifiers (EDFAs) is shown to realize 10.8-THz total signal bandwidth. By using these techniques, 69.1-Tbit/s transmission is demonstrated over 240-km of pure silica-core fibers (PSCFs). Furthermore, we describe PDM 64-QAM transmission over 160 km of PSCFs with the SE of 9.0 b/s/Hz.

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Section: 2-tbit/s 64-qam Transmission Experimentsmentioning

confidence: 99%

Ultra-High Capacity Optical Transmission Technologies for 100 Tbit/s Optical Transport Networks

Sano

Kobayashi

Yoshida

et al. 2011

IEICE Trans. Commun.

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“…As technologies for reducing XPM, there are methods to suppress the generation of XPM by engineering the optical modulation scheme, such as optical DPSK (Differential Phase Shift Keying) [15] and CS-RZ (Carrier Suppressed RZ) [16] and CCDM (Cross phase modulation Canceled-Dispersion Management) [17] in which dispersion management is used for managing time allocation with the adjacent wavelength, so that the red chirp and blue chirp generated by the XPM are canceled. In this paper, as a method different from those above, broadband OPC, in which the generating efficiency of the phase-conjugated light is almost uniform over the bandwidth of the EDFA, is combined with the dispersion flat transmission line.…”

Section: Introductionmentioning

confidence: 99%

Consideration based on simulation for a DWDM system composed of a wide‐band optical phase conjugator and dispersion‐flattened transmission line

Yao

Hanawa

Takahara

et al. 2003

Electron. Comm. Jpn. Pt. I

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SUMMARYIn wavelength division multiplexing transmission, nonlinear effects such as cross phase modulation between the pulses of channels with different wavelengths due to overtaking causes pulse distortion and timing jitter. In particular, deterioration of the transmission characteristics caused by cross phase modulation becomes more conspicuous when the incident peak power becomes larger. In order to realize a wavelength division multiplexing transmission system with a higher bit rate over a longer distance, a high incident peak power that maintains a high SNR is indispensable and a technique to compensate the effect of cross phase modulation is needed. In this paper, computer simulation demonstrates that, by placing a broadband phase conjugator at the center of the dispersion-flattened transmission line, the cross phase modulations caused in the first half and the latter half are canceled and its effect can be reduced. It is further shown that the transmission system with the present configuration can increase the incident peak power by 5 dB over that using nonlinear transmission, which is considered effective for high densities in the case of wavelength division multiplexing transmission with a frequency use efficiency of 0.32 bit/s/Hz.

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“…H IGH SPECTRAL efficiency modulation formats, such as optical duobinary or phase-shaped binary transmission [1] and carrier suppressed return-to-zero signal [2] are very effective ways to improve the capacity of a wavelength-division multiplexing (WDM) system, which is limited mainly by the bandwidth of optical amplifiers. Furthermore, an optical duobinary signal exhibits high tolerance of dispersion because of -phase shifts occurring in the middle of each "space" bits, which can remain the energy in the "mark" bit longer due to the interference [1].…”

Section: Introductionmentioning

confidence: 99%

Receiver optimization for 40-Gb/s optical duobinary signal

Zheng

Liu

Jeppesen

2001

IEEE Photon. Technol. Lett.

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Abstract-The optimized optical receiver for a 40-Gb/s optical duobinary signal is investigated by simulation. It is found, that by optimizing the optical filter and the electrical filter in the receiver, the sensitivity of the optical duobinary can be improved greatly; meanwhile, the high dispersion tolerance nature of the optical duobinary signal will not be degraded.Index Terms-Intersymbol interference, optical duobinary.

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320 Gbit/s (8 × 40 Gbit/s) WDM transmissionover 367 km with 120 km repeater spacingusing carrier-suppressed return-to-zero format

Cited by 141 publications

References 0 publications

Ultra-High Capacity Optical Transmission Technologies for 100 Tbit/s Optical Transport Networks

Ultra-High Capacity Optical Transmission Technologies for 100 Tbit/s Optical Transport Networks

Consideration based on simulation for a DWDM system composed of a wide‐band optical phase conjugator and dispersion‐flattened transmission line

Receiver optimization for 40-Gb/s optical duobinary signal

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