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We investigate the signal-LO frequency offset tolerance of PM-QPSK under tight filtering using all-digital compensation. For frequency offsets of 0.32× symbol rate, the additional receiver electrical bandwidth can be as low as 0.13× symbol rate.
This paper describes experimental demonstration of 50GHz ROADM tolerance for a realtime, single-carrier, 127-Gb/s coherent PM-QPSK system. 10 WSSs are cascaded over 1000km NDSF and <;0.5dB OSNR penalty is measured for the worst case. Cascading limit is also predicted.
Deploying spectrally-efficient 100 Gb/s coherent transponder technology in carrier networks can yield substantial CAPEX and OPEX savings. This paper discusses these economic gains and how a carrier can maximize their return on optical transport investment.
We review recent trends and progress in the area of 100 G module and subsystem development for long haul DWDM applications and explore how the 100 G market will likely differ from that experienced at 40 G.
We review recent trends and progress in the area of 100 G module and subsystem development for long haul DWDM applications and explore how the 100 G market will likely differ from that experienced at 40 G.
A perspective on distortion compensation strategies is provided for past, present, and future commercial 40G deployments. Requirements for practical 100G deployments are ascertained from commercially successful 40G solutions, where seamless upgrade to existing 10G systems was a key requirement. Options meeting these requirements are explored.
A perspective on impairment mitigation strategies is provided for past, present, and future commercial 40G deployments. Requirements for practical 100G deployments are ascertained from commercially successful 40G solutions, where seamless upgrade to existing 10G systems was a key requirement. Options meeting these requirements are explored.
We study via simulation the influence of the DPSK decoder free spectral range (FSR) when strong optical filtering is considered for the NRZ and RZ modulation formats and show that larger FSR can improve performance.
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