Eugen Lach

Transmission of 3×253-Gb/s OFDM-superchannels over 764 km field deployed single mode fibers

We demonstrate transmission of 3×253-Gb/s optical OFDM-superchannels in 100-GHz spacing co-propagating with 112-Gb/s NRZ-QPSK DWDM signals over 764 km field deployed fibers and compare system performance with and without inline DCF modules at the repeater amplifiers.

512-Gb/s DP-16-QAM field trial over 734 km installed SSMF with co-propagating 10 Gb/s NRZ neighbors incorporating soft-FEC decoding

We report on a 512-Gb/s dual-carrier DP-16-QAM long haul field trial over 734 km of dispersion compensated SSMF with 10-Gb/s neighbors. Soft FEC decoding was utilized in the receiver DSP confirming successful transmission.

Field transmission of 8 /spl times/ 170 gb/s over high-loss SSMF link using third-order distributed Raman amplification

This paper reports on the field transmission of N/spl times/170-Gb/s over high-loss fiber links using third-order distributed Raman amplification (DRA) in a commercially operated network of Deutsche Telekom. It gives an overview of the key technologies applied for the realization of an 8 /spl times/ 170 Gb/s (1.28 Tb/s) dense wavelength division multiplexing (DWDM) system demonstrator and summarizes long-haul transmission experiments with terabit-per-second capacity over European fiber infrastructure. Third-order DRA enabled repeaterless transmission of 1 /spl times/ 170 Gb/s and 8 /spl times/ 170 Gb/s over links of 185- and 140-km field fiber, respectively. Including an additional 25 km of lumped standard single-mode fiber (SSMF) at the end of the span, a total loss of 61 and 44 dB, respectively, was bridged.

Terabit transmission of high capacity multiband OFDM superchannels on field deployed single mode fiber

We demonstrate transmission of 5×253-Gb/s optical OFDM-superchannels in 100-GHz spacing over 454 km field deployed fibers, achieving a capacity of 1.16 Tb/s. In addition transmission of 398.5 Gb/s in one OFDM channel over the same distance is reported.

Field trials with channel bit rates of 160 Gbit/s

We present two 8/spl times/170 Gbit/s DWDM/OTDM (1.28 Tbit/s) field transmission experiment both over more than 400 km in commercially operated legacy networks of France Telecom (FT) and Deutsche Telekom (DT), respectively. Conventional EDFA based amplification schemes as well as distributed Raman amplified systems are tested. For different levels of polarization mode dispersion due to different quality of the installed fibre infrastructure adaptive PMD compensation and polarization de-multiplexing is tested.

Field transmission of 8/spl times/170 Gbit/s over high loss SSMF link using third order distributed Raman amplification

We report transmission of 1/spl times/170 Gbit/s over 61 dB and 8/spl times/170 Gbit/s over 44 dB attenuating links in the network of a major European network operator. Third order distributed Raman amplification established long span configurations bridging, respectively, 210 km and 165 km repeaterless span.

16 x 112 gb/s nrz-dqpsk lab experiments and wdm field trial over ultimate metro distances including high pmd fibers

A 16 × 112 Gb/s field transmission trial was successfully performed over legacy fiber infrastructure of Deutsche Telekom comprising partially high polarization mode dispersion (PMD) values of 8 ps. Using a commercial PMD compensator, transmission over high PMD with negligible penalty was achieved. Enabled by the maturity of 43 Gb/s components, a 112 Gb/s nonreturn to zero (NRZ) differential quadrature phase-shift keying modulation format for dense wavelength division multiplexing transmissions with good system margins of 5 dB over 450 km metro distances (3 dB over 764 km) was demonstrated. By using high baud rate of 56 Gbd, penalty-free transmission is performed when copropagating with either 10.7 Gb/s NRZ or 43 Gb/s phase-shaped binary transmission signal channels.

WDM field trial over 764 km SSMF with 16 × 112 Gb/s NRZ-DQPSK co-propagating with 10.7 Gb/s NRZ

A 16×112Gb/s field trial was performed at the Deutsche Telekom fiber infrastructure with partially high PMD. Using 56Gbaud NRZ-DQPSK, no penalty could be observed when co-propagating with a 10.7Gb/s NRZ. Robust Metro DWDM transmission with attractive carrier-grade margins is demonstrated.

8×107 Gbit/s serial WDM field trial over 500 km SSMF

8×107Gbit/s DWDM transmission is achieved over a 500km field installed fibre link in the Deutsche Telekom network, indicating high link utilization of 1bit/s/Hz spectral efficiency, needed for Terabit/s network capacity, required in a mid-term timeframe.

Serial 107 Gbit/s (2x53.5 Gbit/s NRZ-VSB-Polmux) transmission over 15 km SSMF with electronic dispersion compensation

We report on serial 107 Gbit/s (2x53.5 Gbit/s NRZ-VSB-Polmux) transmission over ~15 km SSMF applying only electronic dispersion compensation with a linear equalizer.