Refractometer based on Mach–Zehnder interferometer with peanut-shape structure

Huang, Ran; Ni, Kai; Wu, Xueying; Ma, Qingsong

doi:10.1016/j.optcom.2015.04.070

Cited by 14 publications

(3 citation statements)

References 12 publications

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“…Table 1 lists the performance of this RI sensor compared to other previous sensors of similar structure. To the best of our knowledge, our sensor has high sensitivity at high RI and is significantly better than other works in terms of sensitivity [11][12][13][14][15][16][17][18][19][20]29]. At the same time, the proposed sensors are highly stable, small, easy to manufacture, and have cost-effective sensor configurations.…”

Section: Experiments and Discussionmentioning

confidence: 86%

“…To improve the sensitivity of the sensor, the effective approach is to make MZIs with novel structures such as peanut-shaped structures [12,13], vase-shaped structures [14], spindle-shaped structures [15], sphericalshaped structures [16], and so on. In 2015, Huang et al first reported the MZI of the double peanut-shaped structures for RI measurements [17]. There are different sensitivities of −50.3 nm/RIU and −93.4 nm/RIU, respectively, for ranges of 1.3334-1.3606 and 1.3606-1.4280.…”

Section: Introductionmentioning

confidence: 99%

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High sensitivity refractive index sensor based on double peanut-shaped and etched multimode fiber structures

Wei,

Wang,

Wang

et al. 2023

Laser Phys.

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A fiber optic refractive index (RI) sensor based on an etched multimode fiber (MMF) with a double peanut-shaped structure is proposed and experimentally demonstrated. The sensor consists of two peanut-shaped and a section of etched MMF tapered fiber structure. The excitation of the fundamental mode to higher-order modes is facilitated by using the beam splitting/coupling effect of the double peanut-shaped and etched taper structures, and the higher-order modes can be excited into an evanescent field. In the sensing medium, the stronger the evanescent field, the stronger the energy shock between the fiber and the sensing environment. Experimental results showed that the sensitivity was 326.52 nm/RUI and 823.91 nm/RUI when the etched waist taper diameter was 51.92 μm and the glycerol solution index ranged from 1.3395 to 1.3945 and 1.3945 to 1.4200, respectively. Compared to the MMF sensor structure without etching, the RI sensitivity is improved by about 2 times. In addition, the temperature characteristics of the sensor were investigated over a range of 30 °C–100 °C, and the results showed a maximum temperature sensitivity of only 30.24 pm °m−1. The sensor structure has a low-temperature sensitivity and the temperature effect on the RI measurement results is negligible within the allowable error range. The sensor has the advantages of simple fabrication, wide measurement range, good stability, low cost, and compact structure, which has potential application value in the field of RI detection.

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Section: Experiments and Discussionmentioning

confidence: 86%

Section: Introductionmentioning

confidence: 99%

High sensitivity refractive index sensor based on double peanut-shaped and etched multimode fiber structures

Wei,

Wang,

Wang

et al. 2023

Laser Phys.

View full text Add to dashboard Cite

show abstract

“…Hsu et al fabricated an MZI temperature sensor containing a section of single-mode fiber (SMF) sandwiched between a no-core fiber and a waist-enlarged taper [10]. Huang et al developed an MZI refractive index sensor containing two cascaded peanut-shaped structures [11]. Yang et al proposed an S-tapered fiber sensor for refractive index and strain measurement [12].…”

Section: Introductionmentioning

confidence: 99%

Multiple interference components in a fiber Mach–Zehnder interferometer sensor and their influence on wavelength shift tracing

Zong

Wen

et al. 2020

Meas. Sci. Technol.

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In this paper, multiple interference components in a fiber Mach–Zehnder interferometer sensor and their influence on wavelength shift tracing were studied, based on which a frequency filtering method followed by inverse Fourier transform was proposed to improve the sensor’s response accuracy. Firstly, multiple interference components in the transmission spectrum of a fiber MMF-SMF-MMF structure were simulated, and environmental response discrepancy in different components was calculated. Then, Fourier transform was performed on the transmission spectrum followed by frequency filtering to pick out the dominant interference component. An inverse Fourier transform was then carried out to obtain the wavelength shift which was undisturbed by minor interference components. The method was demonstrated by temperature and ambient refractive index (RI) calibration experiments as well as verification tests. The deviation between temperature sensitivity obtained with and without frequency filtering was 39%. The verification test at 80 °C was carried out and the measurement error was three times lower due to frequency filtering. For RI sensing, the deviation between sensitivity obtained with and without filtering was 19%. Measurement errors at 1.3706 of RI were seven times decreased after frequency filtering. Due to its simplicity and efficiency, the proposed method is believed to have extensive application prospects in sensing fields, especially when high-precision temperature and RI sensing are desired.

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A Mach–Zehnder interferometer based on peanut structure for temperature and refractive index measurement

Zuo²,

Zhang³

et al. 2022

Opt Rev

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Refractometer based on Mach–Zehnder interferometer with peanut-shape structure

Cited by 14 publications

References 12 publications

High sensitivity refractive index sensor based on double peanut-shaped and etched multimode fiber structures

High sensitivity refractive index sensor based on double peanut-shaped and etched multimode fiber structures

Multiple interference components in a fiber Mach–Zehnder interferometer sensor and their influence on wavelength shift tracing

A Mach–Zehnder interferometer based on peanut structure for temperature and refractive index measurement

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