Fast-Tuning Coherent Burst-Mode Receiver for Metropolitan Networks

Packet Timescale Wavelength Switching Enabled by Regression Optimisation

“…The ∼ 4 ns variance measured throughout this data can be attributed to the response times of the digital-select analogue-route front current switches, which varied between 3 and 7 ns. Given this, the data is well grouped and shows a positive correlation between switch time and current, indicating that the optimiser applied in this work has brought the DS-DBR laser's switch transitions close the limits set by the electron carrier mobility [3], [9], [13]. Fig.…”

“…The worst case switch time was left at 9.7 ns. After 15 ns, all switches were within ±5 GHz of their target wavelength; this has previously been shown to be sufficient for burst mode coherent detection [13]. Fig.…”

High data rate coherent optical slot switched networks: a practical and technological perspective

“…In the past few years Alcatel-Lucent Bell Labs has proposed several node architectures for high speed OSS rings [1,2] using coherent signaling for high data rate transmission of 100 Gb/s per channel and above, targeted to metro or datacenter networks; data transmission is alloptical, but control and scheduling are performed in the electronic domain. This paper reviews the formerly proposed node architectures and compares them for key networking aspects.…”

“…Using the DS-DBR laser as the local oscillator, we have demonstrated rapid and accurate wavelength switching, with frequency offset <340 MHz after 80 ns, and a linewidth of 0.62 MHz after 120 ns [2]. To achieve these results, the phase section of the laser was used to compensate for frequency offsets and drifts caused by electronic carrier settling and thermal effects in the laser.…”

“…Optical slot switching is a version of optical packet switching, where all switched entities are slots of the same duration. Industrial research on optical packet switching has recently focused on optical slotted switched (OSS) rings [1][2][3][4], as depicted in Fig. 1, in the context of metropolitan-area (metro) networks.…”