Novel 42.65 Gbit/s dual gate asynchronous digital optical regenerator using a single MZM

Field Trial of WDM-OTDM Transmultiplexing employing Photonic Switch Fabric-based Buffer-less Bit-interleaved Data Grooming and All-Optical Regeneration

“…The data pattern consisted of a repeating 2 7 -1 pseudo random bit sequence (PRBS) of 1ms duration, and a single modified 2 19 -1 PRBS serving as a 1μs guard-band with mark ratio 52.5%. Of the three transmitted channels, λ 1 subsequently entered an ADORE unit, which was configured as in [4,8], including a 15dB gain pre-amplifier with no optical band-pass filter. The ADORE detected the guard-band by simple power measurement, and a control circuit allowed selection of the correct phase for each 1ms burst (i.e.…”

“…All 43 Gb/s channels, whether originating in the OTDM domain or the WDM domain, are input in a MEMS space switch, which provides nonblocking circuit connectivity. In more detail, first, the WDM-OTDM consists of three dual-gate asynchronous digital optical regenerator (ADORE) units [4], each mapping one 43Gb/s on/off keying (OOK) channel on one OTDM time-slot. TSI can be performed by altering the mapping of WDM channels onto ADORE units.…”

An All-Optical Grooming Switch for Interconnecting Access and Metro Ring Networks [Invited]

“…Bit slips from synchronization onto the common local clock are accommodated within a guard band between bursts, thus maintaining data integrity. A detailed explanation of the experimental implementation can be found in [22]. The tributaries at the output of each ADORE unit are subsequently bit-slot interleaved to form the 130 Gbit/s OTDM channel.…”

Optical interconnection of core and metro networks [Invited]

“…The retimed data bursts are then time interleaved to form the OTDM signal and injected into the core ring using a wavelength-selective switch (WSS). In this work, the retiming is performed using an asynchronous digital optical regenerator (ADORE) [11][12][13][14], with one such unit available for each tributary to avoid wavelength blocking, with time-slot assignment determined by the selection of the appropriate ADORE using the optical cross connect. On exiting the core network, via the WSS, the OTDM tributaries are simultaneously extracted using a multiwavelength probe signal applied to a single nonlinear optical gate, the time-slot-to-wavelength mapping being determined by the arrangement of the probe wavelengths.…”