Birefringence in optical fibers formed by proton implantation

Seung Jun Yu, Masahiro Suzuki, Yoshimichi Ohki, Makoto Fujimaki*, Kouichi Awazu, Eisuke Yamaguchi, Satoshi Okude

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)


Birefringence can be induced in silica-based optical fibers by ion implantation. In the present research, protons were implanted in single-mode optical fibers with two different energies, one being the energy with which the protons can just reach the center of the optical fiber core and the other being a slightly lower energy. The degree of birefringence was evaluated by measuring reflection spectra of Bragg gratings formed at the proton-implanted region of the optical fibers. The results confirmed that birefringence is induced by unidirectional densification along the projected range of protons formed in the fiber core and by densification of the fiber cladding. The induced birefringence reached three to ten times higher than that of a conventional birefringent fiber. The birefringence caused by ion implantation can be a versatile tool for manufacturing various optical fiber devices.

Original languageEnglish
Pages (from-to)490-494
Number of pages5
JournalNuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms
Issue number2
Publication statusPublished - 2007 Dec


  • Birefringence
  • Ion implantation
  • Polarization-maintaining optical fibers

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Instrumentation


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