Title :
An MLSE Receiver for Electronic Dispersion Compensation of OC-192 Fiber Links
Author :
Bae, Hyeon-Min ; Ashbrook, Jonathan B. ; Park, Jinki ; Shanbhag, Naresh R. ; Singer, Andrew C. ; Chopra, Sanjiv
Author_Institution :
Intersymbol Commun. Inc, Champaign, IL
Abstract :
A maximum-likelihood sequence estimation (MLSE) receiver is fabricated to combat dispersion/intersymbol interference (chromatic and polarization mode), noise (optical and electrical), and nonlinearities (e.g., fiber, receiver photodiode, or laser) in OC-192 metro and long-haul links. The MLSE receiver includes a variable gain amplifier with 40-dB gain range and 7.5-GHz 3-dB bandwidth, a 12.5-Gb/s 4-bit analog-to-digital converter, a dispersion-tolerant phase-locked loop, a 1:8 demultiplexer, and a digital equalizer implementing the MLSE algorithm. The MLSE receiver achieves more than 50% reach extension at signal-to-noise levels of interest as compared to conventional clock data recovery systems
Keywords :
amplifiers; analogue-digital conversion; demultiplexing equipment; equalisers; intersymbol interference; maximum likelihood sequence estimation; optical fibre dispersion; optical links; optical receivers; phase locked loops; 12.5 Gbit/s; 4 bit; 40 dB; 7.5 GHz; MLSE algorithm; MLSE receiver; OC-192 fiber links; OC-192 metro links; analog-to-digital converter; clock data recovery systems; demultiplexer; digital equalizer; dispersion-tolerant phase-locked loop; dispersion/intersymbol interference; electrical noise; electronic dispersion compensation; long-haul links; maximum-likelihood sequence estimation receiver; optical noise; signal-to-noise levels; variable gain amplifier; Fiber lasers; Intersymbol interference; Laser modes; Maximum likelihood estimation; Optical fiber polarization; Optical noise; Optical receivers; Photodiodes; Polarization mode dispersion; Stimulated emission; A/D converter (ADC); G.709 optical transport network (OTN); OC-192; clock data recovery (CDR); demultiplexer (DEMUX); electronic dispersion compensation (EDC); electronic post-detection equalization (EDE); high-speed ASIC; maximum-likelihood sequence estimation (MLSE); phase-locked loop (PLL); variable gain amplifier (VGA);
Journal_Title :
Solid-State Circuits, IEEE Journal of
DOI :
10.1109/JSSC.2006.883317
