Time-division-multiplexing using pulse position locking for 100 Gb/s applications

Chow, Chi‐Wai; Ellis, A.D.; Parmigiani, Francesca

doi:10.1364/oe.17.006562

Cited by 9 publications

(4 citation statements)

References 11 publications

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“…In practice, clock recovery is required to recover the clock of the WDM signal, in order to synchronize the OFT pumps. Furthermore, the WDM channels could be synchronized and aligned in time as required for the OFT operation, for example by additional time lens alignment 35 . For the similar reason, we placed the DI before the first OFT to render the demodulation independent from temporal misalignments in the OFT caused by slight temporal drift between data signal and OFT-pump.…”

Section: Methodsmentioning

confidence: 99%

Scalable WDM phase regeneration in a single phase-sensitive amplifier through optical time lenses

et al. 2018

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Optical data regeneration is attractive, due to its potential to increase transmission reach and data throughput in communication systems, and several interesting proposals have been made. However, efficient and scalable solutions for regeneration of multiple parallel wavelength channels have been elusive, constituting a key challenge, which must be overcome for optical regeneration to have any prospect of being adapted in actual communication systems. Here we report a scalable wavelength-division multiplexing (WDM) regeneration scheme for phase only regeneration, which satisfies the multichannel requirement, using a set of optical time-lens-based Fourier processors combined with a single phase-sensitive amplifier (PSA). We describe the concept theoretically, and experimentally demonstrate simultaneous regeneration of 16 WDM channels with 50-GHz spacing, each carrying 10-Gbit/s DPSK phase-modulated data. The proposed scheme relies on ultrafast broadband optical processing and is inherently scalable in modulation speed and channel number.

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Section: Methodsmentioning

confidence: 99%

Scalable WDM phase regeneration in a single phase-sensitive amplifier through optical time lenses

et al. 2018

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“…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.…”

Section: Operation Principle Of a Time Lensmentioning

confidence: 99%

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

Hu¹,

Areal²,

Mulvad³

et al. 2011

Opt. Express

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An asynchronous 10 Gb/s Ethernet packet with maximum packet size of 1518 bytes is synchronized and retimed to a master clock with 200 kHz frequency offset using a time lens. The NRZ packet is simultaneously converted into an RZ packet, then further pulse compressed to a FWHM of 400 fs and finally time-division multiplexed with a serial 1.28 Tb/s signal including a vacant time slot, thus forming a 1.29 Tb/s time-division multiplexed serial signal. Error-free performance of synchronizing, retiming, time-division multiplexing to a Terabit data stream and finally demultiplexing back to 10 Gb/s of the Ethernet packet is achieved.

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“…Typical jitter compensation and retiming designs 1,8,9 combine the time-lens with a dispersive element, usually a single mode fiber (SMF). Fig.1 shows the schematic setup for such a retiming unit.…”

Section: Designmentioning

confidence: 99%

Time-lens based optical packet pulse compression and retiming

Areal

Palushani

et al. 2010

SPIE Proceedings

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This paper presents a new optical circuit that performs both pulse compression and frame synchronization and retiming. Our design aims at directly multiplexing several 10G Ethernet data packets (frames) to a high-speed OTDM link. This scheme is optically transparent and does not require clock recovery, resulting in a potentially very efficient solution. The scheme uses a time-lens, implemented through a sinusoidally driven optical phase modulation, combined with a linear dispersion element. As time-lenses are also used for pulse compression, we design the circuit also to perform pulse compression, as well. The overall design is: (1) Pulses are converted from NRZ to RZ; (2) pulses are synchronized, retimed and further compressed at the specially designed time-lens; and (3) with adequate optical delays, frames from different input interfaces are added, with a simple optical coupler, completing the OTDM signal generation. We demonstrate the effectiveness of the design by laboratory experiments.

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Time-division-multiplexing using pulse position locking for 100 Gb/s applications

Cited by 9 publications

References 11 publications

Scalable WDM phase regeneration in a single phase-sensitive amplifier through optical time lenses

Scalable WDM phase regeneration in a single phase-sensitive amplifier through optical time lenses

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

Time-lens based optical packet pulse compression and retiming

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