Publications by authors named "Wanlai Zhu"

In this paper, we investigate the theory of energy distribution when divergent light undergoes harmonic conversion in KDP crystals, and based on this theory, we design and construct a precision measuring instrument for the detuning angle of (KDP) Crystals (MIDC). The device can obtain the detuning angle of the crystal by a single measurement with an average measurement error of 72.78 urad.

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To further reduce the fabrication difficulty of optical fiber sensors and improve the sensing performance, this study introduced the surface plasmon resonance (SPR) effect into optical fiber sensing technology and designed an eccentric-core photonic crystal fiber (EC-PCF). We investigated the characteristics of the two fundamental modes in the fiber core and the surface plasmon polariton (SPP) modes on the surface of the gold film. We also investigated the influence of the structural parameters, such as gold film coating area and thickness, air hole diameter, and eccentricity, on the confinement loss and achieved a refractive index (RI) sensitivity of 31.

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In order to improve the performance of optical fiber sensing and expand its application, a photonic crystal fiber (PCF) plasmonic sensor with a U-shaped channel based on surface plasmon resonance (SPR) is proposed. We have studied the general influence rules of structural parameters such as the radius of the air hole, the thickness of the gold film and the number of U-shaped channels using COMSOL based on the finite element method. The dispersion curves and loss spectrum of the surface plasmon polariton (SPP) mode and the Y-polarization (Y-pol) mode as well as the distribution of the electric field intensity (normE) under various conditions are studied using the coupled mode theory.

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Article Synopsis
  • A new surface plasmon resonance (SPR) sensor using photonic crystal fiber is developed for simultaneous detection of magnetic fields and temperature which are applied through open channels coated with gold and silver.
  • The sensor operates effectively across a magnetic field range of 40-310 Oe and temperature range of 0-60 °C, showing maximum sensitivities of 308.3 picometers per Oe and 6520 picometers per °C.
  • Additionally, it maintains independent sensing without interference between temperature and magnetic field signals, making it a promising solution for challenges in dual-parameter sensing applications.
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