Manufacturing and Spectral Features of Different Types of Long Period Fiber Gratings: Phase-Shifted, Turn-Around Point, Internally Tilted, and Pseudo-Random

The manufacturing and spectral features of different types of long period fiber gratings (LPFGs), ranging from phase-shifted, turn-around point, and internally tilted gratings, to pseudo-random gratings, are described and discussed in detail. LPFGs were manufactured on boron-germanium co-doped photo...

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Bibliographic Details
Published inFibers Vol. 5; no. 3; p. 29
Main Authors Chiavaioli, Francesco, Baldini, Francesco, Trono, Cosimo
Format Journal Article
LanguageEnglish
Published Basel MDPI AG 01.09.2017
Subjects
Boron fibers
Filtration
Gratings (spectra)
long period fiber grating
Manufacturing
manufacturing characteristics
Optical fibers
Phase transitions
Photosensitivity
Planes
random grating
Spectra
tilted grating
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Summary:The manufacturing and spectral features of different types of long period fiber gratings (LPFGs), ranging from phase-shifted, turn-around point, and internally tilted gratings, to pseudo-random gratings, are described and discussed in detail. LPFGs were manufactured on boron-germanium co-doped photosensitive optical fibers with the point-by-point technique using an excimer KrF laser operating at 248 nm. The developed experimental setup to manufacture high-quality LPFGs was designed to totally customize any type of gratings with the possibility of setting different parameters, such as the grating period (or pitch), the number of grating planes, the number of laser shots for each plane, etc. Some important spectral features of the LPFGs’ spectra were taken into account. This allows realizing homemade devices useful in several fiber-based applications, such as optical filtering, coupling systems, random lasers, physical and chemical sensing, and biosensing.
ISSN:2079-6439
2079-6439
DOI:10.3390/fib5030029