Fiber-to-fiber nonlinear coupling via a nematic liquid crystal

B. N. Nyushkov, S. I. Trashkeev, A. V. Ivanenko, D. B. Kolker, P. A. Purtov

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)


Nonlinear optical coupling between two single-mode fibers terminated coaxially in a nematic liquid crystal (NLC) was explored for the first time. Light-induced reorientation of nematic molecules can result in the stable self-collimation of light transmitted through the gap between fibers. Thus, high coupling efficiency can be achieved despite large fiber spacing. We demonstrated a coupling efficiency of up to ∼0.7, achieved with spacing equal to four diffraction lengths. This feature opens up possibilities for the development of novel in-line fiber-optic elements based on NLCs. For instance, a polarization controller was proposed and considered.

Original languageEnglish
Article number015104
Number of pages5
JournalLaser Physics Letters
Issue number1
Publication statusPublished - 1 Jan 2017


  • Freedericksz effect
  • nematic liquid crystal
  • nonlinear coupling
  • optical fiber


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