Microfiber loop resonator based temperature sensor

Harun, Sulaiman Wadi; Lim, Kok-Sing; Damanhuri, S S A; Ahmad, Harith

doi:10.2971/jeos.2011.11026

Cited by 44 publications

(27 citation statements)

References 11 publications

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“…The probing wavelength is assumed to be 1310 nm. It can be seen that high sensitivity and low detection limit are related to high temperature, which is due that the change in the RI of seawater decreases the loss at high temperature and thus increases the Q-factor [16]. Additionally, the optimal fibre diametres for high sensitivity and low detection limit are the same at different temperatures, which indicates that the optimal fibre diametre for MR with the same ring diametre is mainly determined by the probing wavelength.…”

Section: Detection Limitmentioning

confidence: 89%

Numerical calculation of temperature sensing in seawater based on microfibre resonator by intensity-variation scheme

Yang

Wang

2014

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

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A seawater temperature sensing and detection method based on microfibre resonator (MR) by intensity-variation scheme is proposed, which has the advantages of high sensitivity and low detection limit. The dependences of sensitivity on probing wavelength, fibre diametre and ring diametre are studied. Results show that probing wavelength influences the sensitivity by the absorption loss predominantly. Larger absorption loss results in lower sensitivity, which is much different with resonant-wavelength-shift scheme. And sensitivity increases with the increasing ring diametre due to the decreasing bending loss and increasing Q-factor. In addition, there may exist an optimal fibre diametre, with which the sensitivity is maximized. By tuning the parameters of system, sensitivity can be tuned from 0.0784 NI/ • C to 13.79 NI/ • C (NI is the abbreviation of normalized intensity). Correspondingly, dynamic range changes from 11.77 • C to 0.08 • C. Additionally, the dependences of detection limit on wavelength, fibre diametre, and ring diametre are also investigated, which are opposite to that of sensitivity. For different temperatures, the dependences of sensitivity and detection limit at some typical temperatures are studied, which shows that high sensitivity and low detection limit are related to high temperature, and the optimal fibre diametres for high sensitivity and low detection limit are the same at different temperatures. The lowest detection limit is estimated to be 10 -7• C level, which is four orders of magnitude smaller than that of the traditional method. Results shown here are beneficial to find the optimal parameters for the temperature sensors, and offer helpful references for assembling micro-photonics device used in seawater sensing and detection.

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Section: Detection Limitmentioning

confidence: 89%

Numerical calculation of temperature sensing in seawater based on microfibre resonator by intensity-variation scheme

Yang

Wang

2014

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

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“…It can be said that the changes of RIs result in the variation in loss at different temperatures, which affects the coupling between MKR and the single mode fiber [35]. Thus, the line width and depth vary with increasing temperature.…”

Section: Experiments and Discussionmentioning

confidence: 99%

Temperature Sensing in Seawater Based on Microfiber Knot Resonator

Yang

Wang

et al. 2014

Sensors

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Ocean internal-wave phenomena occur with the variation in seawater vertical temperature, and most internal-wave detections are dependent on the measurement of seawater vertical temperature. A seawater temperature sensor based on a microfiber knot resonator (MKR) is designed theoretically and demonstrated experimentally in this paper. Especially, the dependences of sensing sensitivity on fiber diameter and probing wavelength are studied. Calculated results show that sensing sensitivity increases with the increasing microfiber diameter with the range of 2.30–3.91 μm and increases with the increasing probing wavelength, which reach good agreement with results obtained by experiments. By choosing the appropriate parameters, the maximum sensitivity measured can reach to be 22.81 pm/°C. The seawater temperature sensor demonstrated here shows advantages of small size, high sensitivity, easy fabrication, and easy integration with fiber systems, which may offer a new optical method to detect temperature of seawater or ocean internal-wave phenomenon and offer valuable reference for assembling micro sensors used for other parameters related to seawater, such as salinity, refractive index, concentration of NO3− and so on.

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“…1. In this experiment, a standard telecom optical fiber (Corning SMF-28) was used to make a low noise microfiber coupler with the aid of the well-established single stage "flame-brushing" technique [2]. In the fabrication process, two fibers are brought into close proximity after the protective plastic jacket is removed.…”

Section: Fabrication Of Microfiber Couplermentioning

confidence: 99%

“…Microfibers have attracted considerable interests in recent years, as they exhibit a number of exciting properties such as large evanescent field, strong confinement, easy configurability and high robustness [1,2]. These properties are advantageous for a wide range of applications including high-sensitivity optical sensors, nonlinear optics, atom trapping, micro/nano-scale photonic devices and for evanescent coupling to planar waveguides or microcavities.…”

Section: Introductionmentioning

confidence: 99%

Microfiber coupler devices

Muhammad

Jasim

Ahmad

et al. 2012

2012 10th IEEE International Conference on Semiconductor Electronics (ICSE)

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A 2x2 microfiber coupler is demonstrated by laterally fusing and tapering two optical fibers using a flame brushing technique. The coupler has an overlapping length of 40mm with a uniform waist of around 5 µm. The coupler is then used to demonstrate a microfiber knot resonator (MKR) coupler. It is obtained by forming a knot within the coupling region of a microfiber coupler with a 50:50 splitting ratio. With an MKR structure, the coupler produces a resonant response at both output ports. The free spectral range (FSR) of the output spectrum from both ports is obtained at 0.2 nm at a knot diameter of 260 µm. The resonance extinction ratio (RER) of the device varies from 2 to 6 dB while the calculated Q factor and finesse are ∼25646 and 3.3 respectively at both output ports.

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Microfiber loop resonator based temperature sensor

Cited by 44 publications

References 11 publications

Numerical calculation of temperature sensing in seawater based on microfibre resonator by intensity-variation scheme

Numerical calculation of temperature sensing in seawater based on microfibre resonator by intensity-variation scheme

Temperature Sensing in Seawater Based on Microfiber Knot Resonator

Microfiber coupler devices

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