Reflection-mode tilted fiber Bragg grating spectra for cross-sensor refractive-index prediction

Representative reflection-mode tilted fiber Bragg grating spectra for surrounding refractive index prediction across sensors and tilt angles. This subset contains 20,600 spectra from six sensors at 6, 7, 8 and 9 degrees, with 100 technical repeats at each refractive-index level. Each CSV contains wavelength in nm and intensity in dB. File names identify the sensor, refractive index and repeat. The complete dataset is available from the corresponding author upon reasonable request. Associated article: 10.1038/s41598-026-79300-9.