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Title: Point-by-point fiber bragg grating inscription in free-standing step-index and photonic crystal fibers using near-ir femtosecond laser
Authors: Kalli, Kyriacos 
Komodromos, Michael 
Geernaert, Thomas 
Nasiłowski, Tomasz 
Urbańczyk, Wacław 
Wójcik, Jan 
Berghmans, Francis 
Thienpont, Hugo 
Koutsides, Charalambos 
Keywords: Crystal whiskers;Fiber optics;Optical fibers;Photonic crystals
Category: Electrical Engineering - Electronic Engineering - Information Engineering
Field: Engineering and Technology
Issue Date: 15-May-2010
Publisher: Osa
Source: Optics Letters, 2010, vol. 35, no. 10, pp. 1647-1649
Journal: Optics letters 
Abstract: We report what we believe to be the first highly symmetric first-order IR femtosecond laser fiber Bragg gratings within the telecommunications C band in free-standing optical fiber, fabricated with a relatively low NA lens and without use of oil immersion techniques. This grating features the smallest dimensions for a pointby-point fiber grating reported so far (to our knowledge). This achievement paves the way to rapid mass manufacturing of highly efficient and stable Bragg gratings using ultrafast lasers in any type of fiber. Mastering this femtosecond grating inscription technique also allowed the fabrication of the first Bragg gratings with direct near-IR femtosecond inscription in photonic crystal fibers, and without the use of techniques that rely on the compensation of the holey structure.
ISSN: 0146-9592
DOI: 10.1364/OL.35.001647
Rights: © 2010 Optical Society of America.
Type: Article
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