Square-core single-mode-fiber (SC-SMF) with high bending tolerance for data center networks

Chi-Wai Chow, S. P. Huang, C. H. Yeh*, J. Y. Sung, P. F. Liu, Gary Chou, C. L. Pan

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

1 Scopus citations


Square-core optical fiber has been proposed recently for high optical power delivery in industrial processing tools with core size larger than 400×400 μm2. In this work, we first study the possibility of significantly reducing the core side to single-mode condition (i.e. 9×9 μm2) at optical communication wavelength. In the proposed square-core single-mode-fiber (SC-SMF), high bandwidth-distance product and low bending loss are achieved. We also discuss the fabrication of the SC-SMF. After this, the bending losses of the SC-SMF and standard single mode fiber (SSMF) are analyzed and compared. Finally, 10 Gb/s signal transmission using conventional on-off keying (OOK) and orthogonal frequency division multiplexing (OFDM) passing through 200 m, 500 m and 1 km SC-SMFs are performed. Negligible power penalty is observed. We believe that this can be another choice of high bending tolerance fiber which is simple to manufacture.

Original languageEnglish
Pages (from-to)11-14
Number of pages4
JournalOptics Communications
StatePublished - 15 Aug 2015


  • Data center network
  • Fiber design
  • Square-core single-mode-fiber (SC-SMF)

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