In-fiber Mach-Zehnder interferometer inscribed with femtosecond laser for high temperature sensing

Pallarés-Aldeiturriaga, D.; Rodŕıguez-Cobo, Luis; Incera, Antonio Quintela; López‐Higuera, J. M.

doi:10.1117/12.2264991

Cited by 3 publications

(4 citation statements)

References 4 publications

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“…The huge sensitivity range is attributed to the different writing parameters as the dip shift is caused by an RIC in the CWG. From a previous study where the CWG MZI was exposed to high-temperature [125], a non-linear behavior for temperatures above 180 • C is observed with a dip amplitude decrease (suggesting he erasure of the CWG at those temperatures). Axial strain and bending are the other two parameters that can be measured with superior sensitivity than an FBG.…”

Section: Some Applicationsmentioning

confidence: 90%

Optical Fiber Sensors by Direct Laser Processing: A Review

Pallarés-Aldeiturriaga

Roldán-Varona

Rodŕıguez-Cobo

et al. 2020

Sensors

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The consolidation of laser micro/nano processing technologies has led to a continuous increase in the complexity of optical fiber sensors. This new avenue offers novel possibilities for advanced sensing in a wide set of application sectors and, especially in the industrial and medical fields. In this review, the most important transducing structures carried out by laser processing in optical fiber are shown. The work covers different types of fiber Bragg gratings with an emphasis in the direct-write technique and their most interesting inscription configurations. Along with gratings, cladding waveguide structures in optical fibers have reached notable importance in the development of new optical fiber transducers. That is why a detailed study is made of the different laser inscription configurations that can be adopted, as well as their current applications. Microcavities manufactured in optical fibers can be used as both optical transducer and hybrid structure to reach advanced soft-matter optical sensing approaches based on optofluidic concepts. These in-fiber cavities manufactured by femtosecond laser irradiation followed by chemical etching are promising tools for biophotonic devices. Finally, the enhanced Rayleigh backscattering fibers by femtosecond laser dots inscription are also discussed, as a consequence of the new sensing possibilities they enable.

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Section: Some Applicationsmentioning

confidence: 90%

Optical Fiber Sensors by Direct Laser Processing: A Review

Pallarés-Aldeiturriaga

Roldán-Varona

Rodŕıguez-Cobo

et al. 2020

Sensors

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“…Another fabrication approach is an assembly-free sensor scheme supported by femtosecond laser micromachining and etching technology, where interferometric sensors are directly fabricated on an optical fiber, achieving more compact structures with high robustness. Several examples can demonstrate the effectiveness of this approach, such as the rapid fabrication of embedded 3D channels with flexible orientations inside an optical fiber [37], a microchannel inscription to vertically cross the cavity to allow liquid to flow in [38], an intrinsic FOFPI force sensor fabrication [36], a three-dimensional (3D)-printed FOFPI pressure sensor based on direct laser writing [47], a side-opened channel drilled through the hollow core of an HC-PBF in a FOFPI [46], cutting off part of the MMF and drilling openings on one air hole of the dual side-hole fiber (DSHF) in a FOMZI [150], a FOMZI formation [98], a microchannel inscription in the form of an interferometer arm in a FOMZI [93], and microchannel drilling through one core of a twin core fiber (TCF) [177]. The drawback of this approach is the high cost of the necessary equipment and the elaborate fabrication methods, which makes batches difficult to manufacture.…”

Section: Concluding Remarks and Discussionmentioning

confidence: 99%

In-Fiber Interferometric-Based Sensors: Overview and Recent Advances

Miliou

2021

Photonics

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In-fiber interferometric-based sensors are a rapidly growing field, as these sensors exhibit many desirable characteristics compared to their regular fiber-optic counterparts and are being implemented in many promising devices. These sensors have the capability to make extremely accurate measurements on a variety of physical or chemical quantities such as refractive index, temperature, pressure, curvature, concentration, etc. This article is a comprehensive overview of the different types of in-fiber interferometric sensors that presents and discusses recent developments in the field. Basic configurations, a brief approach of the operating principle and recent applications are introduced for each interferometric architecture, making it easy to compare them and select the most appropriate one for the application at hand.

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“…[2][3][4][5][6][7] In many cases, the reflection type of optical fiber sensors such as those based on FBG and FPI are preferred because of their convenient operation especially when the measurement has to be carried out in a very limited spatial area. [2][3][4][5][6][7] FBG is commonly fabricated by UV laser which produces the refractive index (RI) modulation along the optical fiber. However, such an FBG cannot sustain a temperature up to 700°C, as the grating structure would be erased.…”

Section: Introductionmentioning

confidence: 99%

“…1,2 There are many types of optical fiber sensors for high-temperature sensing, such as those based on Mach-Zehnder interferometers (MZIs), fiber Bragg gratings (FBGs), long-period fiber gratings (LPFGs), Fabry-Perot interferometers (FPIs), and so on. [2][3][4][5][6][7] In many cases, the reflection type of optical fiber sensors such as those based on FBG and FPI are preferred because of their convenient operation especially when the measurement has to be carried out in a very limited spatial area. [2][3][4][5][6][7] FBG is commonly fabricated by UV laser which produces the refractive index (RI) modulation along the optical fiber.…”

Section: Introductionmentioning

confidence: 99%

Ultracompact optical fiber high‐temperature sensor based on the angled fiber end face

Wang

Lan

2023

Micro & Optical Tech Letters

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An ultracompact optical fiber Fabry–Perot interferometric sensor is proposed and demonstrated for high‐temperature measurement. The device is simply a section of single‐mode fiber with angled end face of 45°, the reflected light from the angled fiber end face is directed sequentially to the fiber core–cladding and cladding–air interfaces, respectively, and reflected back, and finally returned to the fiber core after being reflected by the angled fiber end face again. As a result, a Fabry–Perot interferometer is constructed. Because of the thermal‐expansion and thermal‐optical effect of the fiber material, the optical path difference between the core–cladding and cladding–air surfaces is changed with temperature, hence the device is well suitable for temperature measurement. In particular, the fiber device has good high‐temperature sustainability up to 1100°C, which makes it attractive for high‐temperature measurement in a narrow or hard‐to‐reach spatial environment.

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In-fiber Mach-Zehnder interferometer inscribed with femtosecond laser for high temperature sensing

Cited by 3 publications

References 4 publications

Optical Fiber Sensors by Direct Laser Processing: A Review

Optical Fiber Sensors by Direct Laser Processing: A Review

In-Fiber Interferometric-Based Sensors: Overview and Recent Advances

Ultracompact optical fiber high‐temperature sensor based on the angled fiber end face

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