Recent Developments in Fiber Optics Humidity Sensors

Ascorbe, Joaquín; Corres, Jesús M.; Arregui, Francisco J.; Matı́as, Ignacio R.

doi:10.3390/s17040893

Cited by 201 publications

(91 citation statements)

References 110 publications

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“…Finally, as an example of the practical applicability of this novel optical configuration, the detection of relative humidity (RH) is explored. The knowledge of this parameter is important in many chemical, physical or biological processes, becoming critical in the final quality of biotechnology, pharmaceutical or food products, as well as in places where it is necessary to preserve health and comfort [16,17,18].…”

mentioning

confidence: 99%

Generation of Lossy Mode Resonances in Planar Waveguides Toward Development of Humidity Sensors

Fuentes

Corres

Matı́as

et al. 2019

J. Lightwave Technol.

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Lossy mode resonances (LMRs) are typically obtained with optical fibre. The Kretschmann configuration is an alternative but LMRs are generated with angles approaching grazing incidence. In this work, a new setup is explored, based on the lateral incidence of light on conventional planar waveguides such as glass slides or coverslips. Indium tin oxide was deposited onto both types of waveguides generating LMRs. The results of the simulations carried out agree well with the experimental results. As an example of the potential of this new and simple optical configuration, a humidity sensor with a sensitivity of 0.212 nm/%RH in the range from 65 to 90% of RH was developed, which expedites the development of other types of sensors already explored with LMR based optical fibre sensors.

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mentioning

confidence: 99%

Generation of Lossy Mode Resonances in Planar Waveguides Toward Development of Humidity Sensors

Fuentes

Corres

Matı́as

et al. 2019

J. Lightwave Technol.

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“…Sensor kelembaban menggunakan serat optik sebagai pandu gelombang mempunyai beberapa kelebihan seperti daya tahan, desain miniatur, kemungkinan dapat bekerja di lingkungan yang mudah terbakar pada suhu dan rentang tekanan yang tinggi, dan kekekalan elektromagnetik [5,6]. Oleh sebab itu pemilihan serat optik sebagai pandu gelombang untuk sensor kelembaban sangat tepat dan bahan TiO 2 -SiO 2 digunakan sebagai bahan pengganti cladding.…”

Section: Pendahuluanunclassified

Rancang Bangun Sensor Kelembaban Udara menggunakan Plastic Optical Fiber (POF) dengan Cladding TiO2-SiO2 dan Data Transmisi

Febrielviyanti¹,

Harmadi²,

Dahlan³

et al. 2019

JFA

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Serat optik merupakan media transmisi berupa kabel yang terbuat dari kaca atau plastik digunakan untuk mentransmisikan sinyal cahaya dari satu titik ke titik lainnya. Prinsip kerja serat optik memanfaatkan prinsip pemantulan sempurna dengan memanfaatkan perbedaan indeks bias antara core dan cladding. Serat optik dapat dijadikan sensor dengan menggunakan sistem instrumentasi yang terdiri dari input, proses, dan output. Input atau masukan menggunakan laser dioda, dimana spektrumnya sangat sempit sehingga cocok dijadikan sumber. Proses pentransmisian data menggunakan serat optik sebagai pandu gelombang. Perekaman data transmisi kelembaban udara menggunakan Arduino Uno dan Ethernet Shield. Output dihasilkan berupa tegangan keluaran yang di tampilkan pada LCD atau PC. Panjang pengupasan terbaik yaitu 2 cm dengan lapisan TiO2-SiO2 sebagai pengganti cladding, dimana menunjukkan nilai R 2 = 0,982. Rata-rata error yang diperoleh dari rancangan alat kelembaban udara sebesar 3,06%. Hal ini menunjukkan ketidak sesuaian antara pembacaan alat yang dirancang dengan alat ukur standarnya, karena sensor yang dirancang tersebut masih sangat rentan terhadap kesalahan sistematik.

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“…However, since the uses of these fibers require the removal of the fiber cladding, the mechanical strength of the fibers is compromised [29]. In addition, this fabrication process is also relatively time consuming [30].…”

Section: Comparison With Another All-optical Humidity Sensormentioning

confidence: 99%

All-Optical Humidity Sensor Using SnO2 Nanoparticle Drop Coated on Straight Channel Optical Waveguide

et al. 2019

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The straight channel optical waveguide coated with the SnO 2 nanoparticle is studied as an all-optical humidity sensor. The proposed sensor shows that the transmission loss of the waveguide increases with increasing relative humidity (RH) from 56% to 90% with very good repeatability. The sensitivity to changes in relative humidity is ~2 dB/% RH. The response time of the humidity sensor is 2.5 s, and the recovery time is 3.5 s. The response to humidity can be divided into 3 different regions, which are correlated to the degree of water adsorption in the SnO 2 nanoparticle layer. Compared with the previous all-optical humidity sensor based on SnO 2 , the proposed sensor exhibits more rapid response, simpler fabrication process, and higher sensitivity. The proposed sensor has a potential application in the long distance, remote agriculture, and biological humidity sensing.

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Recent Developments in Fiber Optics Humidity Sensors

Cited by 201 publications

References 110 publications

Generation of Lossy Mode Resonances in Planar Waveguides Toward Development of Humidity Sensors

Generation of Lossy Mode Resonances in Planar Waveguides Toward Development of Humidity Sensors

Rancang Bangun Sensor Kelembaban Udara menggunakan Plastic Optical Fiber (POF) dengan Cladding TiO2-SiO2 dan Data Transmisi

All-Optical Humidity Sensor Using SnO2 Nanoparticle Drop Coated on Straight Channel Optical Waveguide

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