[EN] FBG in polymer optical fibers (POFs) is a promising technology for a wide range of sensing applications due to a lower Young¿s modulus and a large range of applying strain. Furthermore, POFs have several properties ...
Min, Rui; Ortega Tamarit, Beatriz; Nielsen, K.; Bang, Ole; Marques, Carlos(Institute of Electrical and Electronics Engineers (IEEE), 2018-05)
[EN] We demonstrate that fiber Bragg gratings (FBGs) can be written in a doped polymer optical fiber (POF) in a low
ultraviolet (UV) pulse energy regime (60 ¿J/pulse) using a 248-nm krypton fluoride excimer laser system. ...
Min, Rui; Ortega Tamarit, Beatriz; Hu, Xuehao; Broadway, Christian; Caucheteur, Christophe; Pun, Chi-Fung Jeff; Tam, Hwa-Yaw; Antunes, Paulo; Marques, Carlos(Institute of Electrical and Electronics Engineers, 2018-09-15)
[EN] We demonstrate the Bragg gratings inscription in the 850-nm spectral region by using trans-4-stilbenemethanol-doped poly methyl methacrylate step-index optical fiber and a 248-nm krypton fluoride (KrF) excimer laser ...
[EN] In this work, we obtained chirped Bragg gratings by post-coating uniform poly (methylmethacrylate) (PMMA)
microstructured polymer optical fiber Bragg gratings (POFBGs) with an UV cure adhesive. The main advantage of ...
[EN] We demonstrate chirped Bragg gratings fabrication in doped microstructured tapered polymer fibers by using a uniform phase mask. The use of high photosensitive benzyl dimethyl ketal (BDK) doped core fiber allows to ...
[EN] This paper presents fiber Bragg grating (FBG) inscription with a pulsed 248 nm UV KrF laser in polymer optical fibers (POFs) made of different polymers, namely polymethyl methacrylate (PMMA), cyclic-olefin polymer and ...
Min, Rui; Marques, Carlos; Nielsen, K.; Bang, Ole; Ortega Tamarit, Beatriz(Institute of Electrical and Electronics Engineers, 2018-03-01)
[EN] We demonstrate 20 dB long period grating (LPG) fast inscription in microstructured polymer optical fibers (mPOFs) using a point-by-point technique obtaining an LPG total length of 25 mm. Two 248 nm UV laser pulses of ...
[EN] We obtained chirped gratings by performing hot water gradient thermal annealing of uniform poly (methylmethacrylate) (PMMA) microstructured polymer optical fiber Bragg gratings (POFBGs). The proposed method's simplicity ...
[EN] We demonstrate a largely tunable dispersion fiber Bragg grating (FBG) inscribed in a microstructured polymer optical fiber (mPOF). The bandwidth of the chirped FBG (CFBG) was achieved from 0.11 to 4.86 nm, which ...
[EN] Human physiological signal monitoring is a key factor in diagnosing health conditions, such as monitoring heart rate and respiration. To meet the increasing monitoring requirements, such as safety, economy, and equipment ...
[EN] In this study, we investigated plastic optical fiber (POF) pressure sensors embedded in mattresses to measure
respiration and heart rate for sleep performance monitoring. The signal is amplified in the circuit using ...
[EN] We demonstrate a chirped microstructured polymer fiber Bragg grating based on taper technology for strain sensing application. The effective bandwidth of the grating is dependent on strain and remains practically ...
[EN] We demonstrate a simple way to fabricate phase-shifted fiber Bragg grating in polymer optical fibers as a narrowband transmission filter for a variety of applications at telecom wavelengths. The filters have been ...
[EN] We experimentally demonstrate the first polymer optical fiber Bragg gratings inscribed with only one Nd: YAG laser (266 nm) pulse. The gratings have been inscribed in a single-mode poly (methyl methacrylate) optical ...
[EN] In this work, a linearly chirped fiber Bragg grating (CFBG) inscribed in a microstructured polymer optical fiber (mPOF) has been demonstrated for detecting temperature pro- files during thermal treatments. A CFBG of ...