Polarization dependence of a graphene-optical fiber hybrid Mach–Zehnder interferometer

Li, Lijun; Jia, Weikang; Liu, Yilin; Liu, Yinming; Xu, Lin; Yu, Fei; Xu, Tianzong; Wei, Fengjuan; Gu, Xiaodong

doi:10.1364/ao.58.001808

Cited by 2 publications

(1 citation statement)

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“…Its alcohol gas concentration sensing characteristic is also experimentally investigated, of which the linear fitting curve is shown in Figure 6b. The dip wavelength blue shift is also observed and the sensitivity of the sensor is significantly improved to −1206.1 pm/%, which is mainly due to the graphene having a higher refractive index than air and it covering the inner surface of the cavity, which will cause the energy of the evanescent field to concentrate on the surface of the cavity, thus increasing the contact area between the light field and the surrounding [20,21,22].…”

Section: Resultsmentioning

confidence: 99%

In-Fiber Closed Cavity Interferometric High-Resolution Aqueous Solution and Alcohol Gas Refractometer

Liu

et al. 2019

Sensors

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An optical fiber interferometric refractometer for alcohol gas concentration and low refractive index (RI) solution (with 1.33–1.38 RI range) measurement is theoretically and experimentally demonstrated. The refractometer is based on a single-mode thin-core single-mode (STS) interferometric structure. By embedding a suitably sized air cavity at the splicing point, high-order cladding modes are successfully excited, which makes the sensor more suitable for low RI solution measurement. The effect of the air cavity’s diameter on the sensitivity of alcohol gas concentration was analyzed experimentally, which proved that RI sensitivity will increase with an enlarged diameter of the air cavity. On this basis, the air cavity is filled with graphene in order to improve the sensitivity of the sensor; and the measured sensitivity of the alcohol gas concentration is −1206.1 pm/%. Finally, the characteristics of the single-cavity structure, graphene-filled structure and double-cavity structure sensors are demonstrated, and the linear RI sensitivities are −54.593 nm/RIU (refractive index unit), −85.561 nm/RIU and 359.77 nm/RIU, respectively. Moreover, these sensor structures have the advantages of being compact and easily prepared.

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Section: Resultsmentioning

confidence: 99%

In-Fiber Closed Cavity Interferometric High-Resolution Aqueous Solution and Alcohol Gas Refractometer

Liu

et al. 2019

Sensors

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1.5 μm spectral band laser power modulation multilayer graphene refractive index

Liu

et al. 2019

Optics & Laser Technology

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Polarization dependence of a graphene-optical fiber hybrid Mach–Zehnder interferometer

Cited by 2 publications

References 23 publications

In-Fiber Closed Cavity Interferometric High-Resolution Aqueous Solution and Alcohol Gas Refractometer

In-Fiber Closed Cavity Interferometric High-Resolution Aqueous Solution and Alcohol Gas Refractometer

1.5 μm spectral band laser power modulation multilayer graphene refractive index

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Polarization dependence of a graphene-optical fiber hybrid Mach–Zehnder interferometer

Cited by 2 publications

References 23 publications

In-Fiber Closed Cavity Interferometric High-Resolution Aqueous Solution and Alcohol Gas Refractometer

In-Fiber Closed Cavity Interferometric High-Resolution Aqueous Solution and Alcohol Gas Refractometer

1.5 μm spectral band laser power modulation multilayer graphene refractive index

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Product

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1.5 μm spectral band laser power modulation multilayer graphene refractive index