Simultaneous measurement of temperature and refractive index using focused ion beam milled Fabry-Perot cavities in optical fiber micro-tips

André, Ricardo M.; Warren‐Smith, Stephen C.; Becker, Martin; Dellith, Jan; Rothhardt, Manfred; Zibaii, Mohammad Ismail; Latifi, Hamid; Marques, M. B.; Bartelt, Hartmut; Frazão, Orlando

doi:10.1364/oe.24.014053

Cited by 88 publications

(34 citation statements)

References 33 publications

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“…Such values correspond to the effect of temperature variation but also to the effect of water refractive index variation due to thermo-optic effects. In order to obtain a correct response of the sensor to water refractive index variations, one need to remove the temperature behavior in air [22]. The temperature sensitivity of the structure in air is 10.2 pm/°C and 20.6 pm/°C, respectively for the MZI and MKR.…”

Section: Experimental Setup and Resultsmentioning

confidence: 99%

Microfiber Knot with Taper Interferometer for temperature and refractive index discrimination

Gomes

Frazão

2017

IEEE Photon. Technol. Lett.

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A compact sensing structure using two distinct optical devices, a microfiber knot resonator and an abrupt taper-based Mach-Zehnder interferometer (MZI), is presented. The device was fabricated using only CO 2 laser processing. The transmission spectrum presents two different components with different sensitivities to different physical and chemical parameters. The sensor was characterized in temperature and refractive index. For temperature sensing in water, the MZI component presents a sensitivity of −196 ± 2 pm/°C while the microfiber knot resonator (MKR) component shows a sensitivity of 25.1 ± 0.9 pm/°C, for water temperature variations of 12°C. Sensitivities of 1354 ± 14 nm/RIU and −43 ± 4 nm/RIU were achieved for refractive index sensing for the MZI and the MKR components, respectively, in a refractive index range from 1.32823 to 1.33001. The matrix method was used for the simultaneous measurement of temperature and refractive index.

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Section: Experimental Setup and Resultsmentioning

confidence: 99%

Microfiber Knot with Taper Interferometer for temperature and refractive index discrimination

Gomes

Frazão

2017

IEEE Photon. Technol. Lett.

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“…The focused ion beam uses a set of electromagnetic lenses to focus a beam of ions on the surface of a sample. Compared with the electrons in the SEM technique, the ions have a much larger mass as well as a larger size and thus will eject material from the surface on which they are focused [207]. The FIB technology based on this interaction has proven to be a perfect candidate for micro-machining and nano-fabrication by taking its advantages such as small and controllable spot size in nanometer scale and high beam current density.…”

Section: Focused Ion Beam (Fib) Micro-machined Devicesmentioning

confidence: 99%

“…Coating was also put onto the FPI walls to increase the mirror reflectivity by a factor of about 26 [211], which has been demonstrated with a high sensitivity on a wide RI measurement range [212]. Recently, a multi-cavity structure was fabricated by the FIB technique by combining the concepts of solid silica cavity and gap cavity [207]. The structure was analyzed using a fast Fourier transform (FFT) method to demultiplex the signals of each cavity.…”

Section: Focused Ion Beam (Fib) Micro-machined Devicesmentioning

confidence: 99%

Recent Developments in Micro-Structured Fiber Optic Sensors

Chen

et al. 2017

Fibers

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Recent developments in fiber-optic sensing have involved booming research in the design and manufacturing of novel micro-structured optical fiber devices. From the conventional tapered fiber architectures to the novel micro-machined devices by advanced laser systems, thousands of micro-structured fiber-optic sensors have been proposed and fabricated for applications in measuring temperature, strain, refractive index (RI), electric current, displacement, bending, acceleration, force, rotation, acoustic, and magnetic field. The renowned and unparalleled merits of sensors-based micro-machined optical fibers including small footprint, light weight, immunity to electromagnetic interferences, durability to harsh environment, capability of remote control, and flexibility of directly embedding into the structured system have placed them in highly demand for practical use in diverse industries. With the rapid advancement in micro-technology, micro-structured fiber sensors have benefitted from the trends of possessing high performance, versatilities and spatial miniaturization. Here, we comprehensively review the recent progress in the micro-structured fiber-optic sensors with a variety of architectures regarding their fabrications, waveguide properties and sensing applications.

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“…The sensing applications for this configuration are vast, ranging from strain [5], pressure [6], magnetic field [7] and temperature [8]. Cavity fabrication can be achieved by using chemical etching [9], fiber Bragg Gratings (FBGs) serving as mirrors [10], micromachining [11] or by the use of fusion splicing [12]. The fusion splicing technique differentiates itself as an easy, fast and low cost fabrication method without chemical hazards.…”

Section: Introductionmentioning

confidence: 99%

Hollow Microsphere Fabry–Perot Cavity for Sensing Applications

Monteiro

Silva

Frazão

2017

IEEE Photon. Technol. Lett.

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Two different sensing structures based on a hollow microsphere Fabry-Perot cavity are proposed. The hollow spheroidal cavities are fabricated resorting only to fusion splicing. The first structure is based on a hollow microsphere located at the fiber end and works as a probe sensor. The structure was subjected to lateral load pressure and presents a sensitivity of 1.56 ± 0.01 nm/N. The second proposed sensor relies on an in-line hollow microsphere. The sensing structure allows the detection of lateral loading, with a sensitivity of 2.62 ± 0.02 nm/N, as well as strain detection, with a sensitivity of 4.66 ± 0.03 pm/µε. The two proposed sensors present similar response when subjected to temperature and have low thermal sensitivity.

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Simultaneous measurement of temperature and refractive index using focused ion beam milled Fabry-Perot cavities in optical fiber micro-tips

Cited by 88 publications

References 33 publications

Microfiber Knot with Taper Interferometer for temperature and refractive index discrimination

Microfiber Knot with Taper Interferometer for temperature and refractive index discrimination

Recent Developments in Micro-Structured Fiber Optic Sensors

Hollow Microsphere Fabry–Perot Cavity for Sensing Applications

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