Optical Frame Synchronizer for 10 G Ethernet Packets aiming at 1 Tb/s OTDM Ethernet

Abstract

Synchronization of 10 G Ethernet packets to a local clock was demonstrated using a phase modulator and a SMF as retiming elements. Error free performances for the synchronized packets with different lengths were achieved.

Nonlinear Optical Signal Processing for Tbit/s Ethernet Applications

“…In this scheme, each Ethernet packet would be assigned an OTDM time slot. The scheme has already been demonstrated in a proof-of-principle experiment reaching an aggregate bit rate of 50 Gbit/s [36] and recently 320 Gbit/s [37]. The results are errorrfree as shown in Figure 17.…”

“…This can be carried out using the concept of a time lens [34,35] by which the packet may be stretched or compressed to fit with the local clock frequency. Results on this are shown in Figure 17 where a 10 Gbit/s data packet is synchronised to four 10 Gbit/s optical TDM channels and then multiplexed together with these [36]. To prove the principle, subsequent demultiplexing was done and error-free performance confirmed.…”

“…Therefore, timing jitter tolerant switching techniques are interesting. To this end, the OFT/time lens concept has again turned out to be very useful to create flat-top pulses [40] and compensate for dispersion [26], retiming [34], packet compression [41], and packet synchronisation [36]. Several pulse shaping schemes have been demonstrated for sub-ps flat-top pulse generation, such as the optical differentiation technique [42], and the Mach-Zehnder delay technique [43], and used for timing-tolerant as well as polarization-independent switching [44].…”

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

“…The concept of a time lens stems from the time-space duality, which refers to the analogy between the paraxial diffraction of beams through space and the dispersion of narrowband pulses through dielectric media in time [6][7][8][9][10][11][12]. Since a spatial lens can be used to obtain the Fourier transform of a spatial profile at the spatial focus, a time lens can also be used to obtain the Fourier transform of a temporal profile at the temporal focus.…”

Synchronization, retiming and OTDM of an asynchronous 10 Gigabit Ethernet NRZ packet using a time lens for Terabit Ethernet

“…In this paper, we demonstrate, based on a time lens [3][4][5][6], that an asynchronous Ethernet packet with maximum standardized size of 1518 bytes can be synchronized and retimed to a master clock with 200 kHz frequency offset. The scheme does not require any packet clock recovery or data buffer.…”