Narrow bandwidth Bragg gratings imprinted in polymer optical fibers for different spectral windows

Marques, Carlos; Bilro, Lúcia; Alberto, Nélia; Webb, David J.; Nogueira, Rogério N.

doi:10.1016/j.optcom.2013.05.059

Cited by 72 publications

(34 citation statements)

References 24 publications

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“…The high losses of POFs do not pose a considerable drawback in applications, such as accelerometers or microphones [13]. However, in order to reduce the losses there is a drive towards making FBGs in the visible spectral window, around 650 nm [14].…”

Section: Introductionmentioning

confidence: 99%

Angle dependent Fiber Bragg grating inscription in microstructured polymer optical fibers

Bundalo¹,

Nielsen²,

Bang³

2015

Opt. Express

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Abstract:We report on an incidence angle influence on inscription of the Fiber Bragg Gratings in Polymethyl methacrylate (PMMA) microstructured polymer optical fibers. We have shown experimentally that there is a strong preference of certain angles, labeled ГK, over the other ones. Angles close to ГK showed fast start of inscription, rapid inscription and stronger gratings. We have also shown that gratings can be obtained at almost any angle but their quality will be lower if they are not around ГK angle. Our experimental results verify earlier numerical and experimental predictions of Marshall et al.

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Section: Introductionmentioning

confidence: 99%

Angle dependent Fiber Bragg grating inscription in microstructured polymer optical fibers

Bundalo¹,

Nielsen²,

Bang³

2015

Opt. Express

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“…There are several works using SOF technology for sensing and data communications [46][47][48][49]. In POF technology, the most widely used type in POF sensing applications is the uniform FBG [1,[6][7][8][9][10][11]13,17,24,[26][27][28][29][30][31][32]37,50]. However, recently some great papers showing TFBGs and CFBG in POF for sensing applications were reported [51,52,53].…”

Section: Fiber Bragg Grating Based Sensorsmentioning

confidence: 99%

Polymer optical fiber sensors in human life safety

Marques

Webb

Andre

2017

Optical Fiber Technology

104

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The current state of research into polymer optical fiber (POF) sensors linked to safety in human life is summarized in this paper. This topic is directly related with new solutions for civil aircraft, structural health monitoring, healthcare and biomedicine fields. In the last years, the properties of polymers have been explored to identify situations offering potential advantages over conventional silica fiber sensing technology, replacing, in some cases, problematic electronic technology used in these mentioned fields, where there are some issues to overcome. POFs could preferably replace their silica counterparts, with improved performance and biocompatibility. Finally, new developments are reported which use the unique properties of POF.

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“…Using a 325 nm UV laser, in undoped mPOFs exposure times from 60 to 270 minutes have been reported [19,20], the lowest inscription time reported being approximately 7 minutes [21]. For the step-index fibres the inscription times are shorter and typically around to 45 to 100 minutes [19,22] with the lowest inscription time reported being approximately 20 minutes [13]. The writing times can be reduced by doping the fibre [14], however doped fibres are more difficult and expensive to fabricate, the transmission loss increases and they are less suitable for in-vivo biosensing.…”

Section: Introductionmentioning

confidence: 99%

“…In the last few years, many efforts have been made to increase the quality and diversity of POF sensors for many applications using different methods and techniques [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18]. Fabrication of Bragg gratings in mPOF and step-index fibres, with the phase mask technique is a time consuming process.…”

Section: Introductionmentioning

confidence: 99%

Impact of thermal pre-treatment on preforms for fast Bragg gratings inscription using undoped PMMA POFs

et al. 2017

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Abstract:In this work, improvements in the photosensitivity of undoped POFs, where there was a welldefined pre-annealing of both preforms in two-step process, were reported. We have noticed that when the primary and secondary preforms are annealed, the fiber photosensitivity is higher; otherwise, if any preform (primary or secondary) is not annealed, the fiber photosensitivity is lower. Two PMMA mPOFs are used where the primary and secondary preforms, during the two-step drawing process, have a different thermal treatment. The PMMA POFs drawn where the primary or secondary preform is not specifically pre-treat need longer inscription time than the fibres drawn where both preforms have been pre-annealed at 80ºC for 2 weeks. Using two different UV lasers, for the latter fibre much less inscription time is needed compared to another homemade POF. The properties of a POF fabricated where there are both preform process with thermal treatment is different from those where just one preform step process is thermal treated, as previously shown in the literature, where these POFs are much less sensitive to thermal treatment. Some important parameters were considered such as drawing tension and water content, where using fibers drawn in different tensions give us a similar FBG inscription time.

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Narrow bandwidth Bragg gratings imprinted in polymer optical fibers for different spectral windows

Cited by 72 publications

References 24 publications

Angle dependent Fiber Bragg grating inscription in microstructured polymer optical fibers

Angle dependent Fiber Bragg grating inscription in microstructured polymer optical fibers

Polymer optical fiber sensors in human life safety

Impact of thermal pre-treatment on preforms for fast Bragg gratings inscription using undoped PMMA POFs

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