Hugo S. Carrer

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Multi-mode fibers (MMF) are typically used in LAN applications, in links which may reach or exceed 300 meters. Widespread use of electronic dispersion compensation (EDC) for MMF is prompted by the ratification of the 10GBASE-LRM standard [1]. A number of studies have demonstrated the superiority of MLSD for this application (see [2] and references therein).(More)
—This paper introduces a new parallel carrier recovery architecture suitable for ultra-high speed intradyne coherent optical receivers (e.g., ≥ 40Gb/s). The proposed scheme combines a novel low-latency parallel digital phase locked loop (DPLL) with a feedforward carrier phase recovery (CPR) algorithm. The new low-latency parallel DPLL is designed to(More)
— Chromatic dispersion (CD) and polarization mode dispersion (PMD) severely limit the performance of optical transmission systems operating at data rates of 10 Gb/s and beyond. Electrical equalization techniques have been proposed to compensate dispersion in both coherent and intensity modulation/direct-detection (IM/DD) systems. The former benefit from the(More)
—This paper discusses the investigation of maximum likelihood sequence estimation (MLSE) receivers operating on intensity-modulated direct-detection optical channels. The study focuses on long-haul or metro links spanning several hundred kilometers of single-mode fiber with optical amplifiers. The structure of MLSE-based optical receivers operating in the(More)
Optical communication technology in long-haul and metropolitan links is experiencing a transition to coherent techniques and high spectral efficiency modulation formats such as dual-polarization (DP) QPSK, DP-QAM and OFDM. The combination of coherent demodulation and DSP allows costly optical signal processing hardware used to compensate fiber optic(More)
— As the spacing between channels in dense wavelength division multiplexed (DWDM) links decreases and their number increases, nonlinear coupling effects such as four wave mixing (FWM) and cross-phase modulation (CPM) become more important. These impairments, combined with chromatic dispersion (CD), polarization mode dispersion (PMD), and amplified(More)
— In this paper we present the architecture and experimental evaluation of a single-chip CMOS maximum-likelihood sequence detection (MLSD) transceiver for electronic dispersion compensation (EDC) of multimode optical fibers (MMF) at 10Gb/s data rate. The primary application of this transceiver is the 10GBASE-LRM standard for 10Gb/s Ethernet over MMF [1].(More)