Mechanical strength characteristics of tin-codopedgermanosilicate fibre Bragg gratings by writing through UV-transparent coating

Imamura, Kazuo; Nakai, Takaaki; Moriura, K.; Sudo, Yasuhide; Imada, Y.

doi:10.1049/el:19980702

Cited by 26 publications

(11 citation statements)

References 6 publications

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“…However, most production process for Bragg grating elements involves removal of coating material to write clear gratings to ensue sufficient reflectivity. Recently, however, a direct writing method over coating material has been established 5) . By this production method, the strength of a Bragg grating element is kept almost the same with its original strength.…”

Section: Lifetimementioning

confidence: 99%

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<title>Fiber Bragg grating accelerometer for buildings and civil infrastructures</title>

Mita

Yokoi²

2001

SPIE Proceedings

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A fiber Bragg grating accelerometer was developed for building and civil infrastructures. The accelerometer has a high sensitivity in low frequency range to cover the most important spectrum components of the structural response. The mechanism employed for the accelerometer ensures uniform strain distribution in the Bragg grating element so that the Bragg reflection peak will not be deteriorated. A shake table test was conducted to show good performance of a prototype accelerometer. The lifetime of the accelerometer was also probabilistically evaluated.

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Section: Lifetimementioning

confidence: 99%

“…Although increasing the screening strain results in several failures in a long fiber, the sound fiber length is still long enough to manufacture sensors. In the following, lifetime estimation is made for Bragg grating elements produced by the direct writing method proposed by Imamura et al 5) .…”

Section: Lifetimementioning

confidence: 99%

<title>Fiber Bragg grating accelerometer for buildings and civil infrastructures</title>

Mita

Yokoi²

2001

SPIE Proceedings

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“…Most involve writing gratings through specialized, UV-transparent polymeric fiber coatings. [60][61][62] Writing gratings through a fiber coating may be a solution for short length grating production, but a write-through coating must meet demanding physical and optical requirements to be used in long-length grating production. [63] We developed a process to deposit a diamond-like film (DLF) onto a fiber that is UV-transparent and maintains the mechanical integrity of the fiber close to that of pristine fiber.…”

Section: Write-through Coatings [59]mentioning

confidence: 99%

Broadband fiber Bragg gratings for dispersion management

Brennan

2005

J Optic Comm Rep

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This paper provides an overview and technology update of a dispersion management component made from chirped fiber Bragg gratings. The history and technology of fiber Bragg gratings (FBGs) have been extensively covered in several excellent review articles, [1-6] book chapters, [7] and books. [8,9] We give a brief overview of fiber Bragg grating technology in this section and then focus on the details concerned with construction and performance of dispersion management devices in optical communications systems with a single broadband long-length grating used in reflection. Sampled chirped grating are sometimes referred to as broadband devices, but they actually have a narrow bandwidth of operation that is periodically repeated across a given spectral range. Although these periodic devices have shown promise as dispersion management devices in communications systems, they will not be discussed in this paper.

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“…Development of highly photosensitive thin glass film enables us to write a channel waveguide, leading to an effective cost reduction. Boron, lead, or tin ions are reported as the effective sensitizer to magnify the photoinduced refractive index changes of the core materials such as Ge-SiC)2 glasses [1][2][3].…”

Section: Introductionmentioning

confidence: 99%

Athermal optical waveguide filter fabricated by short pulse laser irradiation

et al. 2003

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Ge-Si02 thin films with extremely high photosensitivity against excimer laser light were fabricated by plasma enhanced chemical vapor deposition method. Direct formation of channel waveguide was successfully confirmed only by irradiation with excimer laser through a Cr mask pattern, which was previously coated on the slab-waveguide by sputtering method. Bragg gratings with high diffraction efficiency were also printed in the waveguide by another laser irradiation through the phase mask. Channel waveguides with Bragg gratings, on the other hand, were fabricated on the glass ceramic substrates with negative thermal expansion coefficient. Doping of B203 to Ge-Si02 glass film was effectively suppressed the temperature drift of the stop band (dX/dT)of the grating. The d?./dT attained in this study was 5pmfC, which was less than 1/2 of those for commercially available waveguide gratings. The wavegides with gratings using the photosensitive oxide thin films should be a promising candidate for future low cost and reliable optical access network.

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Mechanical strength characteristics of tin-codopedgermanosilicate fibre Bragg gratings by writing through UV-transparent coating

Cited by 26 publications

References 6 publications

<title>Fiber Bragg grating accelerometer for buildings and civil infrastructures</title>

<title>Fiber Bragg grating accelerometer for buildings and civil infrastructures</title>

Broadband fiber Bragg gratings for dispersion management

Athermal optical waveguide filter fabricated by short pulse laser irradiation

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