Publications by authors named "Aoyan Zhang"
Article Synopsis
- Multi-core fiber (MCF) is gaining attention for distributed fiber sensing because it can transmit light independently through multiple channels, reducing issues like coherent fading that affect signal quality.
- A new method called spatial rotated-vector-average (SRVA) combines signals from these channels to effectively minimize phase noise and prevent errors in signal processing.
- Experiments with a 2.58-km MCF demonstrated a significant reduction in fading and noise levels, leading to improved localization accuracy and reliable signal recovery, which enhances the use of MCF in long-distance sensing applications.
Soliton molecules, a frequently observed phenomenon in most mode-locked lasers, have intriguing characteristics comparable to their matter molecule counterparts. However, there are rare explorations of the deterministic control of the underlying physics within soliton molecules. Here, we demonstrate the bistable response of intramolecular motion to external stimuli and identify a general approach to excite their quasi-periodic oscillations.
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- Infectious diseases are a significant global health threat, and traditional methods for identifying microbes have high costs and long wait times.
- Raman spectroscopy offers a noninvasive way to quickly gather chemical information about microbes, making it a promising tool for faster diagnosis.
- A new technique called Combined Mutual Learning Net showed an impressive average identification accuracy of 87.96% across various microbial strains and achieved an even higher accuracy of 92.4% using a specialized optical system, highlighting its potential in improving microbial diagnosis.
Article Synopsis
- A fiber speckle sensor (FSS) utilizing tapered multimode fiber (TMMF) has been created to effectively measure changes in the refractive index (RI) of liquid analytes.
- By adjusting the input light's position, multiple modes in the TMMF are excited which alters the speckle pattern, making it sensitive to RI variations in the liquid.
- The sensor demonstrates improved sensitivity and resolution in RI detection, making it a promising and affordable tool for applications like ocean monitoring.
The ability to accurately and cost-friendly monitor heavy metals in environmental solutions such as drinking or tap water is of great significance to the human health. We report a twisted fiber-based sensing mechanism that can realize highly accurate detection of Cd concentration in water solution. The basic design is a twisted single-core fiber simply coated with a propylene thiourea membrane that can absorb Cd.
View Article and Find Full Text PDFAn ultrahigh sensitive optical fiber sensor for trace detection of Cu concentration in aqueous solution with temperature calibration has been developed in this article. Based on the intermodal interference, the sensor is coated with a hydrogel sensing membrane with specific binding to Cu on the no-core fiber/single mode fiber/no-core fiber structure by using our new spray coating method. The imidazole group in the sensing film combines with Cu to produce chelation, which changes the refractive index of the sensing film.
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