FBG-referenced interrogating system using a double-ring erbium-doped fiber laser for high power and broadband

Kang, Kyumin; Jang, M. S.; Kim, Byung Kook; Kim, Jun Sik; Lim, Myo Taeg; Kim, Jinseok

doi:10.1364/oe.403127

Cited by 6 publications

(4 citation statements)

References 50 publications

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“…The linearity and hysteresis are also important parameters in the sensing properties. Low linearity and hysteresis led to undesired degradation in the measurement methodology, which requires an additional feedback loop system or a computing algorithm [40][41][42]. Figure 3d shows the relative capacitance-pressure curve depicting the sensitivity of the pressure sensor.…”

Section: Characteristics Of Polymer-hydrogel Hybrid Pressure Sensormentioning

confidence: 99%

Skin-like Transparent Polymer-Hydrogel Hybrid Pressure Sensor with Pyramid Microstructures

Kang

Jung

et al. 2021

Polymers

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Soft biomimetic electronic devices primarily comprise an electronic skin (e-skin) capable of implementing various wearable/implantable applications such as soft human–machine interfaces, epidermal healthcare systems, and neuroprosthetics owing to its high mechanical flexibility, tissue conformability, and multifunctionality. The conformal contact of the e-skin with living tissues enables more precise analyses of physiological signals, even in the long term, as compared to rigid electronic devices. In this regard, e-skin can be considered as a promising formfactor for developing highly sensitive and transparent pressure sensors. Specifically, to minimize the modulus mismatch at the biotic–abiotic interface, transparent-conductive hydrogels have been used as electrodes with exceptional pressing durability. However, critical issues such as dehydration and low compatibility with elastomers remain a challenge. In this paper, we propose a skin-like transparent polymer-hydrogel hybrid pressure sensor (HPS) with microstructures based on the polyacrylamide/sodium-alginate hydrogel and p-PVDF-HFP-DBP polymer. The encapsulated HPS achieves conformal contact with skin due to its intrinsically stretchable, highly transparent, widely sensitive, and anti-dehydrative properties. We believe that the HPS is a promising candidate for a robust transparent epidermal stretchable-skin device.

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Section: Characteristics Of Polymer-hydrogel Hybrid Pressure Sensormentioning

confidence: 99%

Skin-like Transparent Polymer-Hydrogel Hybrid Pressure Sensor with Pyramid Microstructures

Kang

Jung

et al. 2021

Polymers

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“…Therefore, in order to overcome the difference in modulus with the skin, various strategies with piezoresistive pressure sensors were proposed. Among them, a pressure sensor with high sensitivity was proposed by making microstructures such as micropyramids [10,31,38,39], microdomes [40], and hollow spheres [41] on stretchable dielectric layers. These strategies all essentially have high sensitivity.…”

Section: Introductionmentioning

confidence: 99%

A Soft Pressure Sensor Array Based on a Conducting Nanomembrane

et al. 2021

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Although skin-like pressure sensors exhibit high sensitivity with a high performance over a wide area, they have limitations owing to the critical issue of being linear only in a narrow strain range. Various strategies have been proposed to improve the performance of soft pressure sensors, but such a nonlinearity issue still exists and the sensors are only effective within a very narrow strain range. Herein, we fabricated a highly sensitive multi-channel pressure sensor array by using a simple thermal evaporation process of conducting nanomembranes onto a stretchable substrate. A rigid-island structure capable of dissipating accumulated strain energy induced by external mechanical stimuli was adopted for the sensor. The performance of the sensor was precisely controlled by optimizing the thickness of the stretchable substrate and the number of serpentines of an Au membrane. The fabricated sensor exhibited a sensitivity of 0.675 kPa−1 in the broad pressure range of 2.3–50 kPa with linearity (~0.990), and good stability (>300 Cycles). Finally, we successfully demonstrated a mapping of pressure distribution.

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“…Erbium-doped fiber (EDF) based lasers have the output characteristics of a narrow linewidth, long coherence length, single-longitudinal-mode (SLM), and wide tunability. Furthermore, the EDF lasers can also be applied to the several applications of optical wired-wireless communication, wavelength-division-multiplexing (WDM) transmission, laser radar, optical sensor and bio-photonic [1][2][3][4][5][6]. To generate the single-wavelength and dualwavelength output in the EDF based lasers, deployments of multi-mode fiber-based filter, fiber Bragg grating (FBG), tapered-EDF based Mach-Zehnder Interferometer (MZI), tunable bandpass filter (TBF), and two sections of high birefringent fibers have been applied inside the fiber cavity [6][7][8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

“…Furthermore, the EDF lasers can also be applied to the several applications of optical wired-wireless communication, wavelength-division-multiplexing (WDM) transmission, laser radar, optical sensor and bio-photonic [1][2][3][4][5][6]. To generate the single-wavelength and dualwavelength output in the EDF based lasers, deployments of multi-mode fiber-based filter, fiber Bragg grating (FBG), tapered-EDF based Mach-Zehnder Interferometer (MZI), tunable bandpass filter (TBF), and two sections of high birefringent fibers have been applied inside the fiber cavity [6][7][8][9][10][11]. However, owing to the longer fiber cavity and homogeneous broadening influence [12], achieving a stable multi-wavelength operation with single-longitudinal-mode (SLM) output is difficult.…”

Section: Introductionmentioning

confidence: 99%

A single-mode erbium laser with switchable single- and dual-wavelength operation

et al. 2021

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In the paper, we study a single-longitudinal-mode (SLM) erbium-doped fiber (EDF) ring laser with a switchable single-and dual-wavelength output in C-band scale simultaneously. When a 1×4 wavelength-division-multiplexing (WDM) multiplexer is placed inside the ring cavity, four tunable single wavelengths and five sets of dual-wavelength with several mode-spacing can be accomplished, respectively. To achieve the selective and stable output characteristic, the suitable adjustment of cavity and birefringent losses are operated. Additionally, the laser characteristics of output wavelength, detected power, and optical signal to noise ratio (OSNR) have also been discussed.

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FBG-referenced interrogating system using a double-ring erbium-doped fiber laser for high power and broadband

Cited by 6 publications

References 50 publications

Skin-like Transparent Polymer-Hydrogel Hybrid Pressure Sensor with Pyramid Microstructures

Skin-like Transparent Polymer-Hydrogel Hybrid Pressure Sensor with Pyramid Microstructures

A Soft Pressure Sensor Array Based on a Conducting Nanomembrane

A single-mode erbium laser with switchable single- and dual-wavelength operation

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