Fiber Bragg Gratings in Germanium-Doped Highly Birefringent Microstructured Optical Fibers

Geernaert, Thomas; Nasiłowski, Tomasz; Chah, Karima; Szpulak, M.; Olszewski, J.; Statkiewicz, G.; Wójcik, Jan; Poturaj, Krzysztof; Urbańczyk, Wacław; Becker, Martin; Rothhardt, Manfred; Bartelt, Hartmut; Berghmans, Francis; Thienpont, Hugo

doi:10.1109/lpt.2008.918896

Cited by 56 publications

(33 citation statements)

References 16 publications

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“…Temperature insensitivity can be attained by using only low GeO 2 -doping levels in the core region to limit thermal stress variations. A small concentration of GeO 2 is still required to allow for FBG inscription using conventional UV techniques [36][37][38].…”

Section: Introductionmentioning

confidence: 99%

Shear stress sensing with Bragg grating-based sensors in microstructured optical fibers

Sulejmani¹,

Sonnenfeld²,

Geernaert³

et al. 2013

Opt. Express

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Abstract:We demonstrate shear stress sensing with a Bragg grating-based microstructured optical fiber sensor embedded in a single lap adhesive joint. We achieved an unprecedented shear stress sensitivity of 59.8 pm/MPa when the joint is loaded in tension. This corresponds to a shear strain sensitivity of 0.01 pm/µε. We verified these results with 2D and 3D finite element modeling. A comparative FEM study with conventional highly birefringent side-hole and bow-tie fibers shows that our dedicated fiber design yields a fourfold sensitivity improvement.

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Section: Introductionmentioning

confidence: 99%

Shear stress sensing with Bragg grating-based sensors in microstructured optical fibers

Sulejmani¹,

Sonnenfeld²,

Geernaert³

et al. 2013

Opt. Express

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“…4. This PCF was initially designed to facilitate conventional UV laser based FBG inscription [13]. It has also been used to fabricate the first point-by-point grating in a highly birefringent PCF [7].…”

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confidence: 99%

Transverse propagation of ultraviolet and infrared femtosecond laser pulses in photonic crystal fibers

Baghdasaryan¹,

Geernaert²,

Mergo³

et al. 2012

Photon. Lett. Poland

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-We studied the influence of angular orientation of a photonic crystal fiber (PCF) on optical power that reaches the fiber core during femtosecond grating inscription at 267nm and 800nm. In our numerical study we considered two types of PCFs: three PCF designs with a standard hexagonal lattice and one highly birefringent PCF with three rows of air holes. A dedicated figure of merit, the Transverse Coupling Efficiency (TCE), is used throughout the paper to estimate the influence of the PCF cladding on laser power that reaches the core region. We found that at an inscription laser wavelength of 800nm and for a high filling factor hexagonal lattice PCF, the TCE can reach 1.4. This means that the microstructure can actually help deliver higher power to the core region of the PCF than what can be achieved with a conventional step-index fiber of similar diameter. For a highly birefringent PCF even higher TCE values (up to 2.8) can be achieved for a wide range of orientations.

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“…These simulations were performed under a very different writing conditions than the plane wave CW 244 nm excitation or the approximate plane wave 193 nm ArF source illumination achieved at the ~40 μm FWHM cylindrical lens focus employed in this work. Recent work in a highly birefringent fibre [20] with only one layer of holes did not exhibit a significant rotational dependence, which is expected given the few interface layers involved.…”

Section: Fibre and Fdtd Simulationmentioning

confidence: 81%

Rotationally Variant Grating Writing in Photonic Crystal Fibres!

Holdsworth¹,

Cook²,

Canning³

et al. 2009

TOOPTSJ

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Abstract:The role of rotational alignment during grating writing is comprehensively examined by the measurement of core luminescence from a Ge-doped 12 ring photonic crystal fibre, computer simulation of transmission and, definitively, by inscription of gratings at three angles-0°, 30° and the optimum luminescent angle for this fibre, 21.5°. All experimental results were in accordance with each other and in agreement with simulation. Control of the rotational alignment of the fibre is demonstrably critical for reproducible grating writing.

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Fiber Bragg Gratings in Germanium-Doped Highly Birefringent Microstructured Optical Fibers

Cited by 56 publications

References 16 publications

Shear stress sensing with Bragg grating-based sensors in microstructured optical fibers

Shear stress sensing with Bragg grating-based sensors in microstructured optical fibers

Transverse propagation of ultraviolet and infrared femtosecond laser pulses in photonic crystal fibers

Rotationally Variant Grating Writing in Photonic Crystal Fibres!

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