High Sensitivity All Optical Fiber Conductivity-Temperature-Depth (CTD) Sensing Based on an Optical Microfiber Coupler (OMC)

Yu, Yang; Bian, Qiang; Lü, Yang; Zhang, Xueliang; Yang, Junbo; Liang, Lin-Mei

doi:10.1109/jlt.2018.2878475

Cited by 90 publications

(35 citation statements)

References 23 publications

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“…The waist region of OMCI can respond to salinity and temperature simultaneously. There is a proven solution to eliminate the effects of cross-sensitivity; that is, tracking two sensing dips and constructing a salinity and temperature sensitivity matrix, then performing inversion calculations [12,22,24], as shown in Equation (6). In addition, the two arms of the interferometer only respond to temperature; tracking the distance of two adjacent interference peaks can realize this sensitivity to temperature.…”

Section: Discussionmentioning

confidence: 99%

“…For the dual-fiber fusing and tapering OMC, optical coupling at the waist region can be regarded as the coupling between two optical microfibers. If the input light P 0 is injected into Port1, the output light intensity of Port3 and Port4 can be expressed as [23,24]:…”

Section: Sensing Principlementioning

confidence: 99%

“…In recent years, researchers have discovered that optical microfiber (OM) is very sensitive to surrounding environmental changes due to the characteristics of large evanescent field transmission (a light field transmitted outside the boundary surface of the waveguide) [21]. It demonstrates important research value in highly sensitive sensing applications that can gradually be used in ocean salinity sensing research, including the microfiber knot resonator [6], optical microfiber coupler (OMC) [22][23][24], and OMC-Sagnac [25]. However, to truly succeed in the monitoring of seawater salinity, the optical fiber salinity sensor based on evanescent field transmission must adopt a particular package design to eliminate the influence of seawater impurities, algae and other stray parameters on the detection accuracy and stability of the sensor [24].…”

Section: Introductionmentioning

confidence: 99%

“…It demonstrates important research value in highly sensitive sensing applications that can gradually be used in ocean salinity sensing research, including the microfiber knot resonator [6], optical microfiber coupler (OMC) [22][23][24], and OMC-Sagnac [25]. However, to truly succeed in the monitoring of seawater salinity, the optical fiber salinity sensor based on evanescent field transmission must adopt a particular package design to eliminate the influence of seawater impurities, algae and other stray parameters on the detection accuracy and stability of the sensor [24]. Thus, the optical fiber sensor must have a simple and compact optical path to facilitate probe package integration.…”

Section: Introductionmentioning

confidence: 99%

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Salinity Sensing Characteristics Based on Optical Microfiber Coupler Interferometer

Zhou

Huang

et al. 2020

Photonics

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In this paper, we report a novel and compact sensor based on an optic microfiber coupler interferometer (OMCI) for seawater salinity application. The OMCI device is fabricated by connecting Faraday rotating mirrors to the two out-ports of the microfiber coupler, respectively. The sensor signal processing is based on a wavelength demodulation technique. We theoretically analyze the sensing characteristics with different device structure parameters. Besides, the results show that the date reading error decreases with the thinner waist region and longer arm difference. Through the experiment, the reflection spectra red-shifted as the sea water salinity increased; the highest response sensitivity of the OMCI salinity sensor reached 303.7 pm/‰ for a range of 16.6–23.8‰, and the resolution was less than 0.03‰. This study provides a new technical solution for the development of practical optical fiber seawater salinity sensors.

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Section: Discussionmentioning

confidence: 99%

Section: Sensing Principlementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Salinity Sensing Characteristics Based on Optical Microfiber Coupler Interferometer

Zhou

Huang

et al. 2020

Photonics

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“…In addition, our research group has carried out the research of OMC's three-parameter sensing characteristics of seawater temperature, salinity, and depth. We used the fusing and tapering OMC without any sensitization measures, achieved sensor response capability of 1596 pm/% , 2326 pm/ • C, 169 pm/Mpa, and pointed out the idea of three-parameters synchronous sensing demodulation [16]. However, in order to satisfy the monitoring requirements of the practical marine environment, it is critical to encapsulate and protect the sensor.…”

Section: Introductionmentioning

confidence: 99%

Fabrication and Characterization of Seawater Temperature Sensor with Self-Calibration Based on Optical Microfiber Coupler Interferometer

Zhou

Cao

et al. 2020

Applied Sciences

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In this paper, a novel high-sensitivity temperature sensor with two sensing regions based on optical microfiber coupler interferometer (OMCI) for ocean application is proposed. The OMCI sensor is constructed by connecting Faraday mirrors to the two ports of the microfiber coupler respectively. Its sensing characteristics analysis and experimental test are conducted. Using a broad-spectrum light source as input light, temperature sensor demodulation can be implemented by tracking the drift of the characteristic wavelength (dip wavelength or peak wavelength) of the reflection spectrum. Experimental results show that the temperature sensitivity of the OMCI sensor can reach 1007.4 pm/°C and the detection dynamic range up to 17.6 °C. Besides, due to the two sensing regions in OMCI, self-calibration of seawater temperature sensing and optimization of multi-parameter cross-sensitive demodulation are performed by affecting the non-equal-arm interferometer through a specific package design of the external environment. The sensor has the advantages of high sensitivity, large dynamic range, small size, easy to manufacture, which will play an important role in the practical application of marine environment monitoring.

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A Bio‐Inspired Artificial Tactile Sensing System Based on Optical Microfiber and Enhanced by Neural Network

Weng,

Xiao,

et al. 2024

Advanced Sensor Research

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Human tactile perception involves the activation of mechanoreceptors located within the skin in response to external stimuli, along with the organization and processing within the brain. However, human sensations may be subject to the issues related to some physiological factors (such as skin injury or neurasthenia), resulting in inability to quantify tactile information. To address this challenge, a novel bio‐inspired artificial tactile (BAT) sensing system enabled by the integration of optical microfiber (OM) with full‐connected neural network (FCNN) in this paper is demonstrated, inspired by human physiological characteristics and tactile mechanisms. In this system, the BAT sensor mimics human skin, where the OM serves as the mechanoreceptor for sensing tactile stimuli, while the FCNN functions as a simulated human brain to train and extract the signal characteristics for intelligent object recognition. The experimental results indicate that the proposed BAT sensor can sensitively respond to both the contact force (static tactile stimuli), as well as the vibrotactile events (dynamic tactile stimuli) for the recognition of regular textures. Furthermore, by integrating the trained FCNN, the BAT sensing system accurately identifies various intricate surface textures with an exceptional accuracy of 95.7%, highlighting its potential in next‐generation human‐machine interaction and advanced robotics.

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High Sensitivity All Optical Fiber Conductivity-Temperature-Depth (CTD) Sensing Based on an Optical Microfiber Coupler (OMC)

Cited by 90 publications

References 23 publications

Salinity Sensing Characteristics Based on Optical Microfiber Coupler Interferometer

Salinity Sensing Characteristics Based on Optical Microfiber Coupler Interferometer

Fabrication and Characterization of Seawater Temperature Sensor with Self-Calibration Based on Optical Microfiber Coupler Interferometer

A Bio‐Inspired Artificial Tactile Sensing System Based on Optical Microfiber and Enhanced by Neural Network

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