| 1. |
- Etcheverry, Sebastián, et al.
(författare)
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Trapping and optical identification of microparticles in a liquid with a functional optical fiber probe
- 2018
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Ingår i: Conference on Lasers and Electro-Optics OSA Technical Digest (online) (Optical Society of America, 2018), paper AM4P.6. - : Optical Society of America. - 9781557528209
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Konferensbidrag (refereegranskat)abstract
- A fiber probe traps single micrometer-particles by fluid suction into a hollow microstructure and enables optical identification by the fluorescence light collected in a fiber core. The probe finds applications in life-science and environmental monitoring.
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| 2. |
- Pereira, Joao, et al.
(författare)
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Poling optical fibers with UV lamp
- 2019
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Ingår i: Conference on Lasers and Electro-Optics OSA Technical Digest (Optical Society of America, 2019), paper SM2L.5. - : OSA - The Optical Society. - 9781557528209
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Konferensbidrag (refereegranskat)abstract
- Silicate fibers with internal electrodes are optically poled without a laser by side-exposure to radiation from a UV tubular lamp. Electrooptic coefficients χ(2) ~ 0.04 pm/V and Vπ = 810 V are obtained.
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| 3. |
- Alcusa-Saez, E. P., et al.
(författare)
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All-fiber acousto-optic tunable filter in polyimide coated optical fibers
- 2017
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Ingår i: 2017 19th International Conference on Transparent Optical Networks (ICTON). - : IEEE Computer Society. - 9781538608586
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Konferensbidrag (refereegranskat)abstract
- We present the experimental demonstration of in-fiber acousto-optic coupling in a polyimide-coated optical fiber. Although the presence of the polyimide coating increases is significantly the attenuation of the acoustic wave, we show that acousto-optic interaction can still be produced with reasonable efficiency. The effect of the polyimide coating on the acousto-optic interaction process is analyzed in detailed. Theoretical and experimental results are in good agreement. To our knowledge, this is the first experimental demonstration of acousto-optic coupling in optical fibers with robust protective coating.
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| 4. |
- Camara, Alexandre, et al.
(författare)
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Study of thermally poled fibers with a two-dimensional model
- 2014
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Ingår i: Optics Express. - 1094-4087. ; 22:15, s. 17700-17715
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Tidskriftsartikel (refereegranskat)abstract
- A two-dimensional (2D) numerical model is implemented to describe the movement of ions under thermal poling for the specific case of optical fibers. Three types of cations are considered (representing Na+, Li+ and H3O+) of different mobility values. A cross-sectional map of the carrier concentration is obtained as a function of time. The role of the various cations is investigated. The assumptions of the model are validated by comparing the predictions to experimental data of the time evolution of the nonlinearity induced. A variational analysis of poling parameters including temperature, poling voltage, sign of the bias potential and initial ionic concentrations is performed for a particular fiber geometry. The analysis allows identifying the impact of these parameters on the induced second-order nonlinearity in poled fibers.
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| 5. |
- Etcheverry, Sebastian, et al.
(författare)
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Digital electric field induced switching of plasmonic nanorods using an electro-optic fluid fiber
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Ingår i: Applied Ecology and Environmental Research. - 1589-1623 .- 1785-0037.
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Tidskriftsartikel (refereegranskat)abstract
- We demonstrate the digital electric eld induced switching of plasmonic nanorods between 1 and 0 orthogonal aligned states using an electro-optic fluid fiber component. We show by digitally switching the nanorods, that thermal rotational diffusion of the nanorods can be circumvented, demonstrating an approach to achieve sub-microsecond switching times. We also show, from an initial unaligned state, that the nanorods can be aligned into the applied electric field direction in 110 nanoseconds. The high-speed digital switching of plasmonic nanorods integrated into an all-ber optical component may provide novel opportunities for remote sensing and signaling applications.
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| 6. |
- Flores-Bravo, J. A., et al.
(författare)
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Sensing with coupled-core optical fiber Bragg gratings
- 2021
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Ingår i: Optics InfoBase Conference Papers. - : Optica Publishing Group (formerly OSA).
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Konferensbidrag (refereegranskat)abstract
- Sensitive bending and vibration sensors based on a coupled-core optical fiber with Bragg gratings are proposed and demonstrated. The interrogation of such sensors is cost effective without comprising the sensors performance. Frontiers in Optics / Laser Science
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| 7. |
- Garcia-Ruiz, Andres, et al.
(författare)
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Hermetic Carbon Coatings for Electro-Thermal All-Fiber Phase Modulators
- 2019
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Ingår i: Journal of Lightwave Technology. - : IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC. - 0733-8724 .- 1558-2213. ; 37:18, s. 4567-4572
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Tidskriftsartikel (refereegranskat)abstract
- Joule effect and thermal response of several carbon-coated fibers are modeled and analyzed. An electro-thermally driven all-fiber phase modulator based on these principles is proposed and a proof of concept of it is characterized. This kind of fiber could be the basis for developing all-fiber components aimed to operate in environments where the strength increase and impermeability to hydrogen diffusion guaranteed by the carbon coating is crucial.
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| 8. |
- Gerosa, Rodrigo M., et al.
(författare)
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All-fiber high-flow microfluidic dye laser
- 2013
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Ingår i: Optics InfoBase Conference Papers. - Washington, D.C. : Optical Society of America (OSA). - 9781557529848
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Konferensbidrag (refereegranskat)abstract
- An all-fiber dye laser is demonstrated. The dye solution is kept under flow, allowing for high repetition rate pumping. Threshold average pump power of 2.15 mW and conversion slope efficiency of ~8.5% are achieved.
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| 9. |
- Gerosa, Rodrigo M., et al.
(författare)
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All-fiber high repetition rate microfluidic dye laser
- 2015
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Ingår i: Optica. - 2334-2536. ; 2:2, s. 186-193
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Tidskriftsartikel (refereegranskat)abstract
- Optofluidic dye lasers may play a significant role in future laser applications in numerous areas, combining wavelength flexibility with integration and ease of operation. Nevertheless, no all-fiber integrated dye lasers have been demonstrated so far. In this paper, we report on a series of optofluidic all-fiber Rhodamine optical sources operating at a repetition rate as high as 1 kHz. Dye bleaching is avoided by circulating the Rhodamine dye during optical excitation. The laser radiation is extracted via conventional fibers that are spliced to the dye-filled capillary active medium. A tuneable amplified spontaneous emission source, a multimode laser, and a few transverse-mode laser are demonstrated by adjusting the setup. Threshold pump energies as low as similar to 1 mu J and slope efficiencies of up to mu 9% were obtained, indicating the potential for realworld applications in areas such as spectroscopy and biomedicine.
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| 10. |
- Malmström, Mikael, et al.
(författare)
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All-Fiber Nanosecond Gating for Time-Resolved Spectral Analysis
- 2016
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Ingår i: IEEE Photonics Technology Letters. - 1041-1135 .- 1941-0174. ; 28:8, s. 829-832
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Tidskriftsartikel (refereegranskat)abstract
- We demonstrate the addition of time gating to a standard optical spectrum analyzer (OSA) operating in the spectral region ∼ 1.06 μm. This is accomplished by opening for 7 ns the optical input to the OSA with an electrically driven poled fiber in a Sagnac loop. The sequential interrogation with nanosecond resolution of the reflection from three fiber Bragg gratings along a piece of fiber allows distinguishing the spectral peaks created with a minimum separation of 85 cm. The passive extinction ratio of this device is >40 dB and returns to >40 dB from >23 dB on a 35-ns time scale directly after time gating.
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