Long-period gratings in wavelength-scale microfibers

Haifeng Xuan, Wei Jin, Shujing Liu

Research output: Journal article publicationJournal articleAcademic researchpeer-review

73 Citations (Scopus)


We report the fabrication of long-period gratings (LPGs) in wavelength-scale microfibers with diameters from 1.5 to 3 μm. The LPGs were fabricated by use of a femtosecond IR laser to periodically modify the surface of the fibers. These LPGs have grating periods of a few tens of micrometers, much smaller than those in conventional optical fibers. A compact 10-period LPG with a device length of only ∼150 μm demonstrated a strong resonant dip of >20 dB around 1330 nm. These microfiber LPGs would be useful in-fiber components for microfiber-based devices, circuits, and sensors.
Original languageEnglish
Pages (from-to)85-87
Number of pages3
JournalOptics Letters
Issue number1
Publication statusPublished - 1 Jan 2010

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics


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