A Comprehensive Review: Materials for the Fabrication of Optical Fiber Refractometers Based on Lossy Mode Resonance

Ozcáriz, Aritz; Zamarreño, Carlos R.; Arregui, Francisco J.

doi:10.3390/s20071972

Cited by 38 publications

(23 citation statements)

References 59 publications

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“…Many different absorbing coatings for silica fibers are known this time [2,3]. Our calculations have shown that the most of these coatings can be used in sensors of the considered type.…”

Section: Sensor Applicationsmentioning

confidence: 91%

“…At the adiabatic taper fabrication, the diameter of holes a and the pitch  within the taper waist modify by the rule [5] a=(2Aw/D0)a0, =(2Aw/D0)0. In taper calculations we used values 2Aw =44μm and L =3cm [3] (see Fig. 1).…”

Section: Operating Mechanismmentioning

confidence: 99%

“…If the coating is absorbing, the coupling leads to a quasi-periodic spectral transmittance of the PCF that can be modified by interaction of coating modes with environment. This effect is explained by the coupling of leaky modes of the PCF core and the coating [1] and does not require close contact between the core and the coating, as it is in the case of fiber-optic sensors with lossy mode resonances [2,3]. But when using untapered PCFs, the mentioned coupling of leaky modes can be rather weak.…”

Section: Introductionmentioning

confidence: 99%

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Transmittance of Tapered Photonic Crystal Fibers With Absorbing Coatings

Sicacha

Minkovich

Sotsky

et al. 2020

Preprint

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The interaction effect of the fundamental mode of a photonic crystal fiber (PCF) with a thin-film absorbing coating deposited on a surface of a fiber cladding on the optical transmission of the PCF is studied. It is shown that the transmission has a quasi-periodic spectrum that is determined either by a resonance coupling between the leaky fundamental PCF mode and leaky modes of the coating, or between the leaky fundamental PCF mode and cladding modes localized between PCF air channels and the coating. Examples are presented of using this effect for fiber-optic sensors of refractive index, pressure, and for sensing an adsorption layer of ammonia molecules deposited on a coating surface contacting with air.

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“…Many different absorbing coatings for silica fibers are known this time [2,3]. Our calculations have shown that the most of these coatings can be used in sensors of the considered type.…”

Section: Sensor Applicationsmentioning

confidence: 91%

Section: Operating Mechanismmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Transmittance of Tapered Photonic Crystal Fibers With Absorbing Coatings

Sicacha

Minkovich

Sotsky

et al. 2020

Preprint

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“…Fiber-optic physical and chemical sensors using lossy mode resonance (LMR) have been intensively investigated [1,2]. The LMR occurs due to the interaction of the light propagating through an optical fiber coated with an absorbing film of appropriate optical properties.…”

Section: Introductionmentioning

confidence: 99%

“…The coupling of these modes implies a close contact between the fiber core and the absorbing film. It is achieved by removing the cladding (or a part of it) in a segment of the fiber and using a different coating material to substitute for it [1,2].…”

Section: Introductionmentioning

confidence: 99%

Lossy mode resonances in photonic crystal fibers

Sicacha

Minkovich

Sotsky

et al. 2021

J. Eur. Opt. Soc.-Rapid Publ.

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The interaction effect of the fundamental mode in a special photonic crystal fiber (PCF) with a thin-film absorbing coating deposited on a surface of a fiber cladding on the optical transmission of the PCF is theoretically studied. It is shown that the transmission has a multi-peak spectrum that is determined by the resonance capture of the fundamental PCF mode energy by the coating. In some cases, this capture is explained by a resonance coupling between the fundamental core mode and leaky modes of the coating, or between the fundamental PCF mode and cladding modes located between PCF air channels and the coating. Examples are presented of using this effect to develop fiber-optic sensors of refractive index or pressure, and to sense a nanoscale adsorption layer of ammonia molecules deposited on a coating surface contacting air.

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Device‐System End‐to‐End Design of Photonic Neuromorphic Processor Using Reinforcement Learning

Tang

Zamani

Chen

et al. 2022

Laser & Photonics Reviews

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The incorporation of high-performance optoelectronic devices into photonic neuromorphic processors can substantially accelerate computationally intensive matrix multiplication operations in machine learning (ML) algorithms. However, the conventional designs of individual devices and system are largely disconnected, and the system optimization is limited to the manual exploration of a small design space. Here, a device-system end-to-end design methodology is reported to optimize a free-space optical general matrix multiplication (GEMM) hardware accelerator by engineering a spatially reconfigurable array made from chalcogenide phase change materials. With a highly parallelized integrated hardware emulator with experimental information, the design of unit device to directly optimize GEMM calculation accuracy is achieved by exploring a large parameter space through reinforcement learning algorithms, including deep Q-learning neural network, Bayesian optimization, and their cascaded approach. The algorithm-generated physical quantities show a clear correlation between system performance metrics and device specifications. Furthermore, physics-aware training approaches are employed to deploy optimized hardware to the tasks of image classification, materials discovery, and a closed-loop design of optical ML accelerators. The demonstrated framework offers insights into the end-to-end and co-design of optoelectronic devices and systems with reduced human supervision and domain knowledge barriers.

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A Comprehensive Review: Materials for the Fabrication of Optical Fiber Refractometers Based on Lossy Mode Resonance

Cited by 38 publications

References 59 publications

Transmittance of Tapered Photonic Crystal Fibers With Absorbing Coatings

Transmittance of Tapered Photonic Crystal Fibers With Absorbing Coatings

Lossy mode resonances in photonic crystal fibers

Device‐System End‐to‐End Design of Photonic Neuromorphic Processor Using Reinforcement Learning

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