1 × N Fiber Optic Coupler Based on a Polyhedral Gradient-Index Lens

Yuanhong Yang, Hongying Li, Kuiyan Song, Wei Jin

Research output: Journal article publicationJournal articleAcademic researchpeer-review

4 Citations (Scopus)


A 1 × N fiber coupler based on a single-polyhedral gradient-index lens (p-GRIN) is proposed. The entrance end of the p-GRIN has polyhedral convex cone shape with N surfaces and the exit end has a flat surface. When light from a single-core optical fiber illuminates the input end of the p-GRIN, N spatially separated light beams will be focalized at the output end and coupled, respectively, into N different fibers cores. With ray-tracing analysis, the coupling parameters design model was established. Calculation and simulation with ZEMAX showed that the output beam positions can be optimized by adjusting the input cone angle and the distance between the input fiber end and the cone tip. The light beam power distribution is simulated and mode field evolution is investigated. The results indicate that high coupling efficiency could be achieved with optimized parameters design. This method may be adapted for different types of optical fibers and provide a practical solution for light coupling between single- and multicore fibers.
Original languageEnglish
Article number6955790
Pages (from-to)2685-2689
Number of pages5
JournalJournal of Lightwave Technology
Issue number12
Publication statusPublished - 15 Jun 2015


  • coupler
  • Fiber optics components
  • Lens system design
  • Photonic crystal fibers

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics


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