10-Gb/s optical fiber transmission using a fully analog electronic dispersion compensator (EDC) with unclocked decision-feedback equalization
Cited 5 times inCited 8 times in
- 10-Gb/s optical fiber transmission using a fully analog electronic dispersion compensator (EDC) with unclocked decision-feedback equalization
- Chandramouli, Soumya; Bien, Franklin; Kim, Hyoungsoo; Scholz, Chris; Gebara, Edward; Laskar, Joy
- Analog circuits; Decision feedback equalizers; Equalizers; Optical fiber communication; Optical fiber dispersion
- Issue Date
- IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
- IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES, v.55, no.12, pp.2740 - 2746
- 10-Gb/s data transmission over optical fiber is limited in reach due to optical dispersion phenomena that results in inter-symbol interference. Electronic dispersion compensators employing linear and nonlinear equalization techniques are a compact, cost-effective, and adaptive alternative to optical dispersion compensating techniques and devices that are often bulky, expensive, and not adaptive. The decision-feedback equalizer (DFE) is a type of nonlinear equalizer that can effectively compensate for the nonlinear dispersion effects exhibited by fiber channels. However, at multigigabit/second data rates, the implementation of the DFE is challenged by the first feedback-loop latency requirements and process technology speed limitations. This study demonstrates a novel analog approach and circuit architecture to perform decision-feedback equalization at multigigabit/second data rates. The analog decision-feedback equalizer (ADFE) consists of a four-tap linear analog feed-forward filter and a one-tap nonlinear analog feedback filter and is implemented in a 0.18-μ m CMOS process. The ADFE is completely differential and a broadband single-differential converter is designed for the ADFE front-end to interface with the single-ended output of a photodetector. The circuit is unclocked and uses current-mode logic techniques. The ADFE is used to extend the transmission distance of multimode fiber at 10-Gb/s to 300 m and of single-mode fiber to 120 km.
- ; Go to Link
- Appears in Collections:
- EE_Journal Papers
- Files in This Item:
can give you direct access to the published full text of this article. (UNISTARs only)
Show full item record
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.