Gary Nicholl

Real-Time Single-Carrier Coherent 100 Gb/s PM-QPSK Field Trial

The development of 100 Gb/s transponder technology is progressing rapidly to meet the needs of next-generation optical/IP carrier networks. In this paper, we describe the upgrade of an installed 10 Gb/s field system to 100 Gb/s using a real-time single-carrier, coherent 100 Gb/s polarization-multiplexed quadrature-phase-shift keyed channel. Performance sufficient for error-free operation after forward-error-correction was achieved over installed 900 and 1800 km links, proving the viability of 100 Gb/s upgrades to most installed systems. Excellent tolerance to fiber polarization mode dispersion and narrowband optical filtering demonstrates the applicability of this technology over the majority of installed fiber plant and through existing 50 GHz reconfigurable optical add/drop multiplexers.

Field trial of a real-time, single wavelength, coherent 100 Gbit/s PM-QPSK channel upgrade of an installed 1800km link

We demonstrate a real-time, single-wavelength, coherent 100 G PM-QPSK upgrade of a field system. Performance sufficient for error-free operation after forward-error-correction was achieved over installed 900 km and 1800 km links, proving the viability of seamless 100 Gb/s upgrades.

Coherent 100 Gb/s PM-QPSK field trial

The development of 100 Gb/s transponder technology is progressing rapidly to meet the needs of next-generation optical/IP carrier networks. In this paper, we describe the upgrade of an installed 10 Gb/s field system to 100 Gb/s using a real-time single-carrier, coherent 100 Gb/s polarization-multiplexed quadrature-phase-shift keyed channel. Performance sufficient for error-free operation after forward-error-correction was achieved over installed 900 and 1800 km links, proving the viability of 100 Gb/s upgrades to most installed systems. Excellent tolerance to fiber polarization mode dispersion and narrowband optical filtering demonstrates the applicability of this technology over the majority of installed fiber plant and through existing 50 GHz reconfigurable optical add/drop multiplexers.

A Physical Coding Sublayer for 100GbE [Applications & Practice]

This article describes a proposal for the physical coding sublayer (PCS) for the 40-Gb/s and 100-Gb/s Ethernet interfaces currently under standardization within IEEE 802.3. This proposal has been submitted for consideration to the IEEE 802.3 HSSG (High Speed Study Group), but at this writing, no final decision has been made. This article also introduces a novel inverse-multiplexing scheme based on virtual lanes, which allows the PCS to support a wide variety of optical interface technologies (ranging from parallel to serial) and to accommodate advances in electrical signaling technologies (allowing the PCS electrical interface to get narrower and faster over time). The proposed solution applies equally to both 40 Gb/s and 100 Gb/s, but for simplicity this article focuses on the PCS layer and the novel requirements of the 100- Gb/s Ethernet.

Near-Hitless Protection in IPoDWDM Networks

A new protection scheme that takes advantage of integrated DWDM interfaces on routers to enable a near-hitless switchover of traffic from a failing working path to a protection path, using pre-FEC error statistics.

43Gb/s Adaptive Polarization Mode Dispersion Compensator Field Trial

We describe long-term field measurements at 43Gb/s over a high-PMD link, using one receiver with adaptive PMD compensation and a second receiver without. The Q at both receivers is monitored and correlated with instantaneous DGD.

Very short reach (VSR) parallel optics OC-192/STM-64 interface, optimized for network intra-PoP interconnections

We describe the first functional, OIF approved, SONET/SDH 10Gb/s interface optimized for very short reach (VSR) - typically <300m - intra-office interconnection of routers, switches, and DWDM systems. It is a 12/spl times/1.25Gb/s channel parallel optics solution, leveraging the low cost transceiver (850nm VCSEL), and CMOS (SERDES) technologies originally developed for Gigabit Ethernet (GE).

Proactive protection based on pre-FEC statistics in pure IP networks

We extend the implementation of proactive protection to pure IP protection schemes and test its performance over a real DWDM system and additional failure modes: PMD injection and mechanical disconnection.

40 Gb/s Transmission over a Reconfigurable 10 Gb/s WDM system scaling beyond 1000 km of G.652 fiber.

In this report, the first to our knowledge, 40 Gb/s transmission over a fully reconfigurable 10 Gb/s WDM system, that leveraging 40 Gb/s ODB channels, demonstrates a WDM system scaling beyond 410 Gb/s and 1000 km (12times80 km) of G.652 fiber, with 3 dB margin, even after the ROAMD filter concatenation, and typical residual chromatic dispersion penalties