Negative axicon tip-based fiber optic interferometer cavity sensor for volatile gas sensing

Kanawade, Rajesh; Kumar, Ajay; Pawar, Dnyandeo; Vairagi, Kaushal; Late, Dattatray J.; Sarkar, Sudipta Kumar; Sinha, R. K.; Mondal, Samir K.

doi:10.1364/oe.27.007277

Cited by 42 publications

(10 citation statements)

References 32 publications

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“…Fortunately, some flexible optical waveguide materials, such as hydrogels and PDMS, are good light guide materials and typical stimuli-responsive polymers. Hydrogels have dramatic responsiveness to humidity (Figure A), − temperature (Figure B), ,− ionic strength (Figure C), , light, and so on, PDMS also has obvious responsiveness to external stimuli such as volatility and nonvolatile compounds − and temperature. , …”

Section: Soft and Stretchable Optical Waveguide And Novel Applicationsmentioning

confidence: 99%

Soft and Stretchable Optical Waveguide: Light Delivery and Manipulation at Complex Biointerfaces Creating Unique Windows for On-Body Sensing

Liu

2021

ACS Sens.

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Over the past few decades, optical waveguides have been increasingly used in wearable/implantable devices for onbody sensing. However, conventional optical waveguides are stiff, rigid, and brittle. A mismatch between conventional optical waveguides and complex biointerfaces makes wearable/implantable devices uncomfortable to wear and potentially unsafe. Soft and stretchable polymer optical waveguides not only inherit many advantages of conventional optical waveguides (e.g., immunity to electromagnetic interference and without electrical hazards) but also provide a new perspective for solving the mismatch between conventional optical waveguides and complex biointerfaces, which is essential for the development of light-based wearable/ implantable sensors. In this review, polymer optical waveguides' unique properties, including flexibility, biocompatibility and biodegradability, porosity, and stimulus responsiveness, and their applications in the wearable/implantable field in recent years are summarized. Then, we briefly discuss the current challenges of high optical loss, unstable signal transmission, low manufacturing efficiency, and difficulty in deployment during implantation of flexible polymer optical waveguides, and propose some possible solutions to these problems.

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Section: Soft and Stretchable Optical Waveguide And Novel Applicationsmentioning

confidence: 99%

Soft and Stretchable Optical Waveguide: Light Delivery and Manipulation at Complex Biointerfaces Creating Unique Windows for On-Body Sensing

Liu

2021

ACS Sens.

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“…The sensitivity (S) of the prepared sensor is defined as the ratio of the wavelength shift over the corresponding temperature or pressure change. Similarly, we define the ratio of the minimum resolution Ω (Ω = 20 pm) of the spectrometer (OSA) over the sensor sensitivity S as the minimum measurement accuracy (MMA)-and the MMA is given by [23]…”

Section: Sensing Principlementioning

confidence: 99%

Investigation of Composite Structure with Dual Fabry–Perot Cavities for Temperature and Pressure Sensing

Wang

Liu

et al. 2021

Photonics

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To deeply analyze the influence of diaphragm materials on the temperature and pressure sensitivity of Fabry–Perot interferometer-based dual-parameter fiber sensors, the multiple transfer method was used to fabricate the dual Fabry–Perot cavities, respectively, consisting of the following combinations: epoxy resin AB/polydimethylsiloxane (PDMS), Ecoflex0030 silicone rubber /PDMS, and PDMS/Ecoflex0030 silicone rubber. Experimental results show that the temperature sensitivities are, respectively, 528, 540, and 1033 pm/°C in the range of 40–100 °C. Within the applied pressure range of 100–400 kPa, the pressure sensitivities are, respectively, 16.0, 34.6, and 30.2 pm/kPa. The proposed sensors have advantages of proper sensitivity, simple fabrication, cost-effectiveness, controllable cavity length, and suitability for practical sensing applications.

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“…Among several types of VOC sensors, − luminescent (active) optical microresonators are particularly promising for remote sensing. Not only the fast response and a small footprint, which are typical advantages of optical sensors, luminescent resonators are operable with a spatially segregated excitation light source and a photodetector (Figure b).…”

Section: Introductionmentioning

confidence: 99%

Nanoporous Fluorescent Microresonators for Non-wired Sensing of Volatile Organic Compounds down to the ppb Level

Tanji

Yamagishi

Fujita

et al. 2022

ACS Appl. Polym. Mater.

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Luminescent resonators have been exploited as promising non-wired sensors for volatile organic compounds (VOCs). Nonetheless, their sensitivity is insufficient to detect dilute VOCs down to ppb concentration ranges due to the little physisorption quantity on the surface. Here, we report a nanoporous fluorescent resonator that exhibits an enhanced optical response to VOC molecules by accumulative physisorption in the pores and, thus, detects VOCs with concentration down to ppb ranges. A polymer with intrinsic microporosity is allowed to assemble into spherical microparticles (MS PIM‑1 ) that exhibit whispering gallery-mode resonance. The resonance peak undergoes a spectral shift upon exposure to a model gaseous compound (pyridine) with an excellent sensitivity (0.40 nm ppm–1) and limit-of-detection (470 ppb) without losing its linearity down to 800 ppb. Adsorption of pyridine in the pores and the underlying molecular mechanism can be quantitatively evaluated based on the change in the refractive index. MS PIM‑1 preferentially detects aromatic hydrocarbons and pyridine while is less responsive to highly polar or non-polar chemicals.

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Negative axicon tip-based fiber optic interferometer cavity sensor for volatile gas sensing

Cited by 42 publications

References 32 publications

Soft and Stretchable Optical Waveguide: Light Delivery and Manipulation at Complex Biointerfaces Creating Unique Windows for On-Body Sensing

Soft and Stretchable Optical Waveguide: Light Delivery and Manipulation at Complex Biointerfaces Creating Unique Windows for On-Body Sensing

Investigation of Composite Structure with Dual Fabry–Perot Cavities for Temperature and Pressure Sensing

Nanoporous Fluorescent Microresonators for Non-wired Sensing of Volatile Organic Compounds down to the ppb Level

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