Abstract
Optical packet switching (OPS) networks and its subsystems, like the burst-mode receiver, are an essential technology currently used in passive optical networks (PONs). Moreover, OPS may play a fundamental role on future hybrid optical circuit switching (OCS)/OPS networks and datacenter networks. This paper focuses on two fundamental subsystems of packetized optical networks: the digital coherent burst-mode receiver and the electro-optical switch. We describe and experimentally characterize a novel digital coherent burst-mode receiver that makes uses of the Stokes parametrization to rapidly estimate the state of polarization (SOP) and optimize the equalizer convergence time. This burst-mode receiver is suitable for optical packetized networks that make use of advanced modulation formats such as quadrature amplitude modulation (QAM). We study the suitability of (Pb,La)(Zr,La)O3 (PLZT) optical switches for amplitude-variable coherent polarization division multiplexing (PDM) 16QAM modulation format and demonstrate a switching capacity of 10.24 Tb/s/port. We demonstrate a full 2 × 2 OPS node with a control plane capable of solving packet contention by means of packet dropping or buffering with a switching capacity of 10.24 Tb/s/port. Finally, we demonstrate the operation of the 2 × 2 OPS node with a record capacity of 12.8 Tb/s/port plus 100 km of dispersion-compensated fiber transmission.
Highlights
Deployed optical networks are able to dynamically allocate network resources with a granularity of a wavelength channel in the so-called fixed grid optical networks [1], or, more recently, with some variability on the spectral width of each wavelength channel and adapting the modulation format in the flexible/elastic optical networks [2]
state of polarization (SOP) were captured, and the SOP was estimated using the whole of the optical packet in order were captured, and the SOP was estimated using the whole of the optical packet in order to to minimize the estimation errors, and the SOP was digitally corrected
These plot show that the payload bit error rate (BER) is below the FEC limit of 3 × 10−3 after the optical packet switching (OPS) node and demonstrates the successful operation of the 2 × 2 OPS node including packet buffering with a capacity of 12.24 Tb/s/port
Summary
Deployed optical networks are able to dynamically allocate network resources with a granularity of a wavelength channel in the so-called fixed grid optical networks [1], or, more recently, with some variability on the spectral width of each wavelength channel and adapting the modulation format in the flexible/elastic optical networks [2]. All these networks follow the connection oriented paradigm [3].
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