A new approach for drilling lateral microchannels in photonic crystal fibres

Amanzadeh, Mohammad; Aminossadati, Saiied M.

doi:10.1109/ipcon.2016.7831311

Cited by 7 publications

(8 citation statements)

References 7 publications

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Section: Introductionmentioning

confidence: 99%

“…Another noncontact method used for the production of microchannels is based on the use of a focused ion beam (FIB) as presented in [18,19] for which, due to lack of destructive factors, no losses resulting from the fabrication of the microchannel were recorded. The disadvantage of this method is the time required to process a single hole (~30 min for a single hole with a diameter of 10 µm [19]). Furthermore, because of the limited space in the FIB-based setup, it is impossible to process long (i.e., several meters) fibers in multiple places, which is required for providing optimum gas filling conditions within the long optical path provided by the fiber.…”

Section: Introductionmentioning

confidence: 99%

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Fabrication of Microchannels in a Nodeless Antiresonant Hollow-Core Fiber Using Femtosecond Laser Pulses

Kozioł

Jaworski

Krzempek

et al. 2021

Sensors

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In this work, we present femtosecond laser cutting of microchannels in a nodeless antiresonant hollow-core fiber (ARHCF). Due to its ability to guide light in an air core combined with exceptional light-guiding properties, an ARHCF with a relatively non-complex structure has a high application potential for laser-based gas detection. To improve the gas flow into the fiber core, a series of 250 × 30 µm microchannels were reproducibly fabricated in the outer cladding of the ARHCF directly above the gap between the cladding capillaries using a femtosecond laser. The execution time of a single lateral cut for optimal process parameters was 7 min. It has been experimentally shown that the implementation of 25 microchannels introduces low transmission losses of 0.17 dB (<0.01 dB per single microchannel). The flexibility of the process in terms of the length of the performed microchannel was experimentally demonstrated, which confirms the usefulness of the proposed method. Furthermore, the performed experiments have indicated that the maximum bending radius for the ARHCF, with the processed 100 µm long microchannel that did not introduce its breaking, is 15 cm.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Fabrication of Microchannels in a Nodeless Antiresonant Hollow-Core Fiber Using Femtosecond Laser Pulses

Kozioł

Jaworski

Krzempek

et al. 2021

Sensors

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“…Photonic crystal fibres (PCFs) have been of interest to researchers since 1996 [1] due to their increasing application in the development of novel optical components [2][3][4][5][6] . PCFs are mainly classified into (1) index-guiding PCFs with a solid core (SC-PCF) and (2) photonic bandgap and anti-resonant PCFs with a hollow core (HC-PCFs) surrounded by periodic arrangements of air holes running along the entire length of fibre [7,8].…”

Section: Introductionmentioning

confidence: 99%

Numerical analysis of gas diffusion in drilled Hollow-Core Photonic Crystal fibres

et al. 2018

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Hollow-Core Photonic Crystal Fibres (HC-PCFs) have emerged as an area of interest for fibre-optic based distributed gas sensing. In order to allow the gas to enter the hollow core of the fibre, various techniques such as lateral drilled side holes have been investigated in the literature. However, it is essential to understand the mechanisms of gas flow in HC-PCFs with drilled side holes in order to determine the optimum design parameters of the sensor such as the size and spacing of drilled side holes. This study aims to analyse the gas flow behaviour and determine the response time of HC-PCFs with drilled side holes by developing and applying a numerical model based on gas diffusion in a microchannel. The model is validated against the results of two different experimental studies. The model is then applied to determine the response time is a function of the length, the number and spacing of side holes and the gas type (methane and acetylene). It is found that an inverse relationship exists between the effects of number and spacing of side holes on the response time and the optical loss, suggesting that an optimum design point exists.

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“…In order to create a localized heating, an absorption pump beam was sent through the gas, which resulted in a modulated Refractive Index (RI) of the gas. This change in RI and phase of gas allowed PT spectroscopy to detect low concentration gases [160,161]. The details of the experimental method have been described below.…”

Section: Methodsmentioning

confidence: 99%

“…This thermal change modulates the RI and the phase of test gas. This additional changes in Refractive Index(RI) and phase let the PT detect low concentration gases [160,161].…”

Section: Methodsmentioning

confidence: 99%

Performance Simulation of Hollow-Core Photonic Crystal Fibre as a Gas Sensor for Industry Applications

Masum¹

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Statement of parts of the thesis submitted to qualify for the award of another degree No works submitted towards another degree have been included in this thesis. Research Involving Human or Animal Subjects No animal or human subjects were involved in this research. viii Acknowledgements I would like to take this opportunity to thank all the people who have helped and supported me with my PhD journey this far. My principal advisor Associate Professor Saiied Aminossadati deserves special thanks. I am very grateful for his benevolent support, guidance, and friendship throughout this journey. The patience and attention he has dedicated to me are kindly appreciated.

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A new approach for drilling lateral microchannels in photonic crystal fibres

Cited by 7 publications

References 7 publications

Fabrication of Microchannels in a Nodeless Antiresonant Hollow-Core Fiber Using Femtosecond Laser Pulses

Fabrication of Microchannels in a Nodeless Antiresonant Hollow-Core Fiber Using Femtosecond Laser Pulses

Numerical analysis of gas diffusion in drilled Hollow-Core Photonic Crystal fibres

Performance Simulation of Hollow-Core Photonic Crystal Fibre as a Gas Sensor for Industry Applications

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