Focusing optimization in multimodal graded index fiber coupling by wavefront shaping

Pellegrini, Paloma E. S.; Biazoli, Claudecir R.; Panepucci, Roberto R.; Gabrielli, Lucas H.

doi:10.1016/j.optlastec.2023.109238

Cited by 6 publications

(1 citation statement)

References 20 publications

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“…Due to the mismatch in mode field diameters between NCHCF and SMF, significant coupling loss occurs. However, GIF exhibits self-focusing characteristics [12] and can enhance coupling efficiency when integrated into the optical pathway [13]. The unique optical wave-guiding properties of GIF render it highly versatile for a wide array of applications within the optical domain.…”

Section: Theoretical Analysismentioning

confidence: 99%

Negative curvature hollow core fiber-functionalized cascaded structure for curvature sensing

Zhang,

et al. 2023

Advanced Sensor Systems and Applications XIII

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We demonstrate a high-sensitivity curvature sensor based on the negative curvature hollow core fiber (NCHCF). The graded index fiber (GIF) is introduced between single mode fiber (SMF) and NCHCF for the sensor of cascaded structure of SMF-GIF-NCHCF-GIF-SMF. The coupling efficiency can be improved by cascading the GIF. The experimental results show that there are two coexisted mechanisms in the cascaded structure, where multi-mode interference (MMI) is sensitive to curvature change and anti-resonance (AR) is insensitive to curvature change. The obtained curvature sensitivity based on MMI is up to -4.97 nm/m -1 . With advantages of compactness, flexibility, high sensitivity and so on, the curvature sensor shows prospects in structural health monitoring, medical applications, energy exploration and other fields.

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Section: Theoretical Analysismentioning

confidence: 99%