2026-10-10T08:37:43Z https://api.figshare.com/v2/oai

oai:figshare.com:article/34018371 2026-09-29T14:52:59Z category_30130 portal_669 item_type_3 month_year_09_2026

Data_Envelope-free Vernier effect via peak position recognition in cascaded fiber Bragg grating sensors for high-sensitivity sensing HAILI MA (17046159) Photonics, optoelectronics and optical communications Fiber Bragg grating Envelope-free Vernier effect Fiber sensor <p dir="ltr">Despite their widespread use and excellent performance, Fiber Bragg Grating (FBG) sensors face a fundamental limitation: the optical Vernier effect, an effective sensitivity-enhancing technique, cannot be directly applied due to FBG’s single-resonance-peak feature. This paper proposes a novel envelope-free peak position recognition method, combined with cascaded FBGs to achieve over 86-fold sensitivity enhancement, verified by temperature sensing experiments. Notably, the limit of detection of the sensor is reduced by 39.33% compared with single bare FBG (without Vernier effect), outperforming the traditional optical Vernier method. Without the need for an additional physical reference arm sensor, this method features simple implementation, controllable cost and flexible performance tuning. Building on our prior virtual Vernier framework, this work first extends the envelope-free Vernier strategy to cascaded FBGs, breaking the inherent barrier of FBG sensing and offering a low-cost flexible scheme for high-precision fiber measurement.</p> 2026-09-29T14:52:59Z Dataset Dataset 10.25398/rd.northumbria.34018371.v1 https://figshare.com/articles/dataset/Data_Envelope-free_Vernier_effect_via_peak_position_recognition_in_cascaded_fiber_Bragg_grating_sensors_for_high-sensitivity_sensing/34018371 CC BY 4.0