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Journal of Lightwave Technology

Journal of Lightwave Technology

| A JOINT IEEE/OSA PUBLICATION

  • Vol. 31, Iss. 22 — Nov. 15, 2013
  • pp: 3525–3534

Comparison of Intersymbol Interference Power Penalties for OOK and 4-PAM in Short-Range Optical Links

Krzysztof Szczerba, Petter Westbergh, Erik Agrell, Magnus Karlsson, Peter A. Andrekson, and Anders Larsson

Journal of Lightwave Technology, Vol. 31, Issue 22, pp. 3525-3534 (2013)


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Abstract

We present results of experimental and theoretical investigations of intersymbol interference in 4-PAM transmission in short-range optical communications links based on the power penalty. A test link comprised of a directly modulated 850 nm VCSEL with up to 200 m of multimode fiber and direct detection was used. The link bandwidth was below 10 GHz and the maximum achieved data rate with 4-PAM was 44 Gbps over 100 m of fiber. In the same case and at similar sensitivity, only 32 Gbps could be achieved with OOK. If typical forward error correction could be applied, the sensitivity of the 4-PAM system was improved by up to 4 dB, reaching –10 dBm at 25 Gbps.

© 2013 IEEE

Citation
Krzysztof Szczerba, Petter Westbergh, Erik Agrell, Magnus Karlsson, Peter A. Andrekson, and Anders Larsson, "Comparison of Intersymbol Interference Power Penalties for OOK and 4-PAM in Short-Range Optical Links," J. Lightwave Technol. 31, 3525-3534 (2013)
http://www.opticsinfobase.org/jlt/abstract.cfm?URI=jlt-31-22-3525

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