Characterization of Temperature-Dependent Refractive Indices for Nematic Liquid Crystal Employing a Microfiber-Assisted Mach–Zehnder Interferometer

“…A segment of microfiber tapered from standard singlemode fiber (SMF) using a flame scanning technique is spliced with a certain lateral offset between two SMFs by employing a commercial splicer (Fujikura FSM-60 s, Japan) with corrected splicing parameters (fusion power: 170 bit, fusion time: 140 ms, pre-fusion time: 20 ms). Also, the details regarding the sensor fabrication procedure could be referred from our previous study [26]. As shown in figure 1(b), D off and D MF specify the lateral offset and the diameter of the microfiber, respectively.…”

Section: Device Fabrication and Theoretical Analysis Of Sensor Perfor...mentioning

confidence: 99%

Highly sensitive in-line microfluidic sensor based on microfiber-assisted Mach–Zehnder interferometer for glucose sensing

Xie

Zhang

Liu

et al. 2017

J. Opt.

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A highly sensitive microfluidic sensor based on a microfiber-assisted Mach–Zehnder interferometer (MAMZI) is proposed and experimentally demonstrated for the detection of low-concentration glucose solution. A segment of microfiber tapered from standard single-mode fiber (SMF) is spliced between two SMFs with pre-designed lateral offset to constitute the miniaturized MAMZI probe. The transmission spectral response to environmental refractive index variation has been experimentally investigated for glucose concentration ranges of 300 mg dL−1 to 3000 mg dL−1 and 0 to 270 mg dL−1 and the glucose concentration detection limit is 3 mg dL−1, and the experimentally observed transmission spectral responses are in accordance with our theoretical simulation results. Owing to its high sensitivity, non-enzymatic operation method, ease of fabrication and compact size, our proposed MAMZI for glucose sensing is anticipated to be employed in biomedical applications.

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“…The sensitivity to ambient refractive index has been improved significantly due to the opening U-shaped cavity constructed by a segment of microfiber as one interference arm between two single-mode fibers (SMFs) [12]. Xie et al adopted the MAMZI to measure the temperature dependence of refractive indices for nematic liquid crystal [13]. Liu et al proposed the compact light-intensitycontrolled MAMZI by exploiting the photosensitivity of ethyl orange solution [14].…”

Section: Introductionmentioning

confidence: 99%

A highly sensitivity humidity sensor based on mismatching fused fiber Mach–Zehnder interferometric without moisture material coating

Gong

Liu

Wang

et al. 2020

J. Opt.

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A novel relative humidity (RH) sensor based on a mismatching fused Mach–Zehnder interferometric (MFMZI) fiber structure which can be operated without coating moisture sensitive material, has been proposed and experimentally demonstrated. A segment of SMF with around 1200 μm in length is sliced between lead-in and lead-out SMFs to construct the U-shaped cavity as sensing part. The optimal structure mismatching and sensing section result in definite improvement of the RH sensitivity. The maximum sensitivities of the optimal MFMZI fiber sensor can reach 0.1667 nm/%RH and 0.62 dB/%RH with the humidity range beyond ∼87.5%RH being acquired by employing the U-shaped cavity of 1222 μm in length. With the help of the beam propagation method, the light transmission characteristics of the various mismatching parameters within the humidity sensor are also analyzed. In addition, different from other mismatching fused fiber sensors, the proposed HR sensor has such distinguished features as compact size, ease of fabrication, which has potential applications in a variety of production application.

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Characterization of Temperature-Dependent Refractive Indices for Nematic Liquid Crystal Employing a Microfiber-Assisted Mach–Zehnder Interferometer

Cited by 18 publications

References 31 publications

Engineering entangled photon pairs with metal–organic frameworks

Engineering entangled photon pairs with metal–organic frameworks

Highly sensitive in-line microfluidic sensor based on microfiber-assisted Mach–Zehnder interferometer for glucose sensing

A highly sensitivity humidity sensor based on mismatching fused fiber Mach–Zehnder interferometric without moisture material coating

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