Towards Absolute Shape Measurements Using Quasi-Integer Ratio Time-Expanded ? OTDR - Escobar-Vera, C.; Soriano-Amat, M.; Martin-Lopez, S.; Gonzalez-Herraez, M.; Fernández-Ruiz, M.R. (2024 IEEE Sensors Applications Symposium, SAS 2024 - Proceedings, 2024)