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A dispersion tolerant receiver for fiber-optic links, in 0.18 mum SiGe BiCMOS, implements a Class-2 partial response maximum likelihood (PRML) equalization entirely in the analog domain. Post-FEC error free operation is achieved with data received from over 400 km of uncompensated single mode fiber (SMF). The receiver complies with XFI Jitter specifications for Telecom (SONET OC-192 and G.709 ldquoOTU-2rdquo).
A finite impulse response (FIR) equalizer utilizing 0.18 mum SiGe BiCMOS provides unparalleled performance as a building block for analog electronic dispersion compensation (EDC) applications. A new track-and-hold (T/H) topology improves on the existing performance limitations of the switched emitter follower (SEF) architecture. The new T/H achieves extended dynamic range, for higher input bandwidths,...
This paper describes a timing recovery system (TRS) based on an analog approximation of the minimum mean squared error (MMSE) algorithm. The TRS has been fabricated in a 0.18 mum, 150 GHz SiGe BiCMOS process as part of a high performance Class-2 Partial Response Maximum Likelihood (PRML) dispersion tolerant optical receiver. This decision directed clock recovery architecture was implemented for the...
A 6th order low-pass 1.6 to 3.2 GHz gm-C filter for fiber optic adaptive EDC receivers cascades three Bi-Quads permitting reduction of group delay variation down to 10 ps. Cut-off frequency is tuned by switching CMOS varactors polarity. THD is below -40 dB at 0.9 Vpp-diff output. CTF is implemented in a 0.18 mum SiGe process, it occupies 0.17 mm2 and consumes 0.3 W from 3.3 V supply.
We use the method of multiple scales borrowed from perturbation theory to derive a new time-domain transfer function of the nonlinear fiber-optic wave-division multiplexing (WDM) communications channel. The obtained channel response, derived from the nonlinear Schrodinger equation is shown to be equivalent to the multi-path fading frequency selective channel encountered in wireless links. In the linear...
Elimination of DWDM transponders in an IP over DWDM network is demonstrated, for the first time, using DWDM XFP MSA transceivers with integrated G.709 framing for OAM management and Forward Error Correction for performance capabilities.
Combining, for the first time, a 1-sample/bit monolithic PRML silicon with standard MZM modulators and PIN receivers, we experimentally demonstrate error-free transmission (with standard G709 FEC) over a 400-Km uncompensated standard single-mode fiber link.
We identify the key requirements for an open system approach to integrated IP over DWDM optical transport. Using, for the first time, DWDM XENPAK interfaces with integrated G.709 framing we demonstrate error-free connectivity of core IP routers across a 574 km amplified link with end-to-end G.709 FEC and OAM functions.
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