ZTE

ZTE Communications ›› 2013, Vol. 11 ›› Issue (4): 53-58.doi: DOI:10.3939/j.issn.1673-5188.2013.04.008

• Research Paper • Previous Articles    

Capacity Scaling Limits and New Advancements in Optical Transmission Systems

Zhensheng Jia   

  1. Optics Lab, ZTE USA, NJ 07960, USA
  • Received:2013-09-25 Online:2013-12-25 Published:2013-12-25
  • About author:Zhensheng Jia (Zhensheng.jia@zte.com.cn) received his BE and MSE degrees from Tsinghua University, China. He received his PhD degree from Georgia Institute of Technology, USA. He is currently the assistant director of the Optics Lab, ZTE USA. Prior to joining ZTE, he worked for Beijing Research Institute of China Telecom Corporation Limited and Telcordia Technologies, US. Dr. Jia has authored more than 100 articles and has given a number of invited talks.
  • Supported by:
    This work is supported by National High-Tech Research and Development Program of China under Grant No. 2013AA010501.

PDF (PC)

Abstract: Optical transmission technologies have gone through several generations of development. Spectral efficiency has significantly improved, and industry has begun to search for an answer to a basic question: What are the fundamental linear and nonlinear signal channel limitations of the Shannon theory when there is no compensation in an optical fiber transmission system? Next-generation technologies should exceed the 100G transmission capability of coherent systems in order to approach the Shannon limit. Spectral efficiency first needs to be improved before overall transmission capability can be improved. The means to improve spectral efficiency include more complex modulation formats and channel encoding/decoding algorithms, prefiltering with multisymbol detection, optical OFDM and Nyquist WDM multicarrier technologies, and nonlinearity compensation. With further optimization, these technologies will most likely be incorporated into beyond-100G optical transport systems to meet bandwidth demand.

Key words: spectral efficiency, Shannon limit, Gaussian noise, optical signal noise ratio, modulation, nonlinearity compensation