Single Wavelength Channel 10.2 Tb/s TDM-Data Capacity using 16-QAM and Coherent Detection

Palushani,; Schmidt-Langhorst,; Ludwig,; Fischer, Monika; Schubert,

doi:10.1364/ofc.2011.pdpa9

Cited by 39 publications

(23 citation statements)

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“…Optical time division multiplexing (OTDM), in which data streams are encoded on short optical pulses at the same wavelength and then multiplexed in time, has been demonstrated at the very high bit rates of 5.1 Tb/s or 9.5 Tb/s using either direct or coherent detection [11,12]. However, OTDM relies on short pulses with rapidly rising or falling edges, which usually occupy a large bandwidth in the frequency domain, reducing the spectral efficiency.…”

Section: Introductionmentioning

confidence: 99%

320 Gb/s Nyquist OTDM received by polarization-insensitive time-domain OFT

Hu¹,

Kong²,

Palushani³

et al. 2013

Opt. Express

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Abstract:We have demonstrated the generation of a 320 Gb/s Nyquist-OTDM signal by rectangular filtering on an RZ-OTDM signal with the filter bandwidth (320 GHz) equal to the baud rate (320 Gbaud) and the reception of such a Nyquist-OTDM signal using polarization-insensitive time-domain optical Fourier transformation (TD-OFT) followed by passive filtering. After the time-to-frequency mapping in the TD-OFT, the Nyquist-OTDM signal with its characteristic sinc-shaped time-domain trace is converted into an orthogonal frequency division multiplexing (OFDM) signal with sinc-shaped spectra for each subcarrier. The subcarrier frequency spacing of the converted OFDM signal is designed to be larger than the transform-limited case, here 10 times greater than the symbol rate of each subcarrier. Therefore, only passive filtering is needed to extract the subcarriers of the converted OFDM signal. In addition, a polarization diversity scheme is used in the four-wave mixing (FWM) based TD-OFT, and less than 0.5 dB polarization sensitivity is demonstrated in the OTDM receiver. References and links1. P. J. Winzer, "High-spectral-efficiency optical modulation formats," J. Lightwave Technol. 30(24), 3824-3835 (2012 Schindler, C. Koos, W. Freude, and J. Leuthold, "512QAM Nyquist sinc-pulse transmission at 54 Gbit/s in an optical bandwidth of 3 GHz," Opt. Express 20(6), 6439-6447 (2012 (2011)

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Section: Introductionmentioning

confidence: 99%

320 Gb/s Nyquist OTDM received by polarization-insensitive time-domain OFT

Hu¹,

Kong²,

Palushani³

et al. 2013

Opt. Express

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“…In combination with complex modulation formats (e.g. 16-QAM) and polarization multiplexing, up to 10.2 Tbit/s has been realized [1]. At such high speeds, the complexity of the receiver scales with the number of OTDM tributaries.…”

Section: Introductionmentioning

confidence: 99%

OTDM-to-WDM Conversion of Complex Modulation Formats by Time-Domain Optical Fourier Transformation

Palushani

Richter

Ludwig

et al. 2012

Optical Fiber Communication Conference

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“…Time-division multiplexing (TDM) is an effective technology for building ultra-high speed networks, which has been demonstrated at a symbol rate of 1.28 Tbaud on a single wavelength [1][2][3]. As Ethernet packets are asynchronous in nature but a TDM system based on bit interleaving is synchronous, the Ethernet packets in each link have to be synchronized to a master clock in the Terabit Ethernet interfaces and then time division multiplexed into a serial Tb/s data stream.…”

Section: Introductionmentioning

confidence: 99%

Synchronization, retiming and time-division multiplexing of an asynchronous 10 Gigabit NRZ Ethernet packet to terabit Ethernet

Hu¹,

Areal²,

Mulvad³

et al. 2011

Opt. Express

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An asynchronous 10 Gb/s Ethernet packet with maximum packet size of 1518 bytes is synchronized and retimed to a master clock with 200 kHz frequency offset using a time lens. The NRZ packet is simultaneously converted into an RZ packet, then further pulse compressed to a FWHM of 400 fs and finally time-division multiplexed with a serial 1.28 Tb/s signal including a vacant time slot, thus forming a 1.29 Tb/s time-division multiplexed serial signal. Error-free performance of synchronizing, retiming, time-division multiplexing to a Terabit data stream and finally demultiplexing back to 10 Gb/s of the Ethernet packet is achieved.

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Single Wavelength Channel 10.2 Tb/s TDM-Data Capacity using 16-QAM and Coherent Detection

Cited by 39 publications

References 1 publication

320 Gb/s Nyquist OTDM received by polarization-insensitive time-domain OFT

320 Gb/s Nyquist OTDM received by polarization-insensitive time-domain OFT

OTDM-to-WDM Conversion of Complex Modulation Formats by Time-Domain Optical Fourier Transformation

Synchronization, retiming and time-division multiplexing of an asynchronous 10 Gigabit NRZ Ethernet packet to terabit Ethernet

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