Fabrication of multipoint side-firing optical fiber by laser micro-ablation

Hoang Nguyen, Md Masud Parvez Arnob, Aaron T. Becker, John C. Wolfe, Matthew K. Hogan, Philip J. Horner, Wei Chuan Shih

Research output: Contribution to journalArticle

7 Scopus citations

Abstract

A multipoint, side-firing design enables an optical fiber to output light at multiple desired locations along the fiber body. This provides advantages over traditional end-toend fibers, especially in applications requiring fiber bundles such as brain stimulation or remote sensing. This Letter demonstrates that continuous wave (CW) laser microablation can controllably create conical-shaped cavities, or side windows, for outputting light. The dimensions of these cavities determine the amount of firing light and their firing angle. Experimental data show that a single side window on a 730 μ m fiber can deliver more than 8% of the input light. This can be increased to more than 19% on a 65 μ m fiber with side windows created using femtosecond laser ablation and chemical etching. Fine control of light distribution along an optical fiber is critical for various biomedical applications such as light-activated drug-release and optogenetics studies.

Original languageEnglish (US)
Pages (from-to)1808-1811
Number of pages4
JournalOptics Letters
Volume42
Issue number9
DOIs
StatePublished - May 1 2017

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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