Multi-channel mode converter based on a modal interferometer in a two-mode fiber

Guolu Yin, Changle Wang, Yunhe Zhao, Biqiang Jiang, Tao Zhu, Yiping Wang, Lin Zhang

Research output: Contribution to journalArticlepeer-review


In this Letter, we propose a multi-channel mode converter with the concept of a modal interferometer in a two-mode fiber (TMF). Two lateral stress points in a TMF function as in-line fiber mode couplers to construct the modal interferometer, and both transmission spectra and near-field patterns confirm that the LP01LP01 mode is successfully converted into an LP11LP11 mode at the multiple channels. The measured mode conversion efficiency almost completely follows the theoretical tendency. Finally, the mode conversion is realized at 20 channels in the C+LC+L wavelength band with conversion efficiency up to 99.5% and insertion loss as low as 0.6 dB. Furthermore, the channel spacing can be freely tailored by adjusting the distance between two stress points.
Original languageEnglish
Pages (from-to)3757-3760
JournalOptics Letters
Issue number19
Early online date29 Aug 2017
Publication statusPublished - 19 Sept 2017


  • Fiber optics components
  • Fiber optics communications
  • Multiplexing
  • Interference


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