title: Current Developments on Optical Feedback Interferometry as an All-Optical Sensor for Biomedical Applications.
abstract: Optical feedback interferometry (OFI) sensors are experiencing a consistent increase in their applications to biosensing due to their contactless nature, low cost and compactness, features that fit very well with current biophotonics research and market trends. The present paper is a review of the work in progress at UPC-CD6 and LAAS-CNRS related to the application of OFI to different aspects of biosensing, both in vivo and ex vivo. This work is intended to present the variety of opportunities and potential applications related to OFI that are available in the field. The activities presented are divided into two main sensing strategies: The measurement of optical path changes and the monitoring of flows, which correspond to sensing strategies linked to the reconstruction of changes of amplitude from the interferometric signal, and to classical Doppler frequency measurements, respectively. For optical path change measurements, measurements of transient pulses, usual in biosensing, together with the measurement of large displacements applied to designing palliative care instrumentation for Parkinson disease are discussed. Regarding the Doppler-based approach, progress in flow-related signal processing and applications in real-time monitoring of non-steady flows, human blood flow monitoring and OFI pressure myograph sensing will be presented. In all cases, experimental setups are discussed and results presented, showing the versatility of the technique. The described applications show the wide capabilities in biosensing of the OFI sensor, showing it as an enabler of low-cost, all-optical, high accuracy biomedical applications.
authors.affiliation: LAAS-CNRS, Université de Toulouse, CNRS, INP, 6 AllÃée Emile Monso, 31400 Toulouse, France. julien.perchoux@enseeiht.fr.
authors.forename: Julien
authors.initials: J
authors.lastname: Perchoux
authors.affiliation: LAAS-CNRS, Université de Toulouse, CNRS, INP, 6 AllÃée Emile Monso, 31400 Toulouse, France. adam.quotb@enseeiht.fr.
authors.forename: Adam
authors.initials: A
authors.lastname: Quotb
authors.affiliation: Centre for the Development of Sensors, Instruments and Systems, Universitat Politècnica de Catalunya (UPC-CD6), Rambla Sant Nebridi 10, E08222 Terrassa, Spain. reza.atashkhooei@cd6.upc.edu.
authors.forename: Reza
authors.initials: R
authors.lastname: Atashkhooei
authors.affiliation: Centre for the Development of Sensors, Instruments and Systems, Universitat Politècnica de Catalunya (UPC-CD6), Rambla Sant Nebridi 10, E08222 Terrassa, Spain. francisco.javier.azcona@cd6.upc.edu.
authors.forename: Francisco J
authors.initials: FJ
authors.lastname: Azcona
authors.affiliation: LAAS-CNRS, Université de Toulouse, CNRS, INP, 6 AllÃée Emile Monso, 31400 Toulouse, France. ermiquet@ceaden.edu.cu.|Centro de Aplicaciones Tecnológicas y Desarrollo Nuclear, Calle 30, No. 502, Miramar, La Habana 11300, Cuba. ermiquet@ceaden.edu.cu.
authors.forename: Evelio E
authors.initials: EE
authors.lastname: Ramírez-Miquet
authors.affiliation: LAAS-CNRS, Université de Toulouse, CNRS, INP, 6 AllÃée Emile Monso, 31400 Toulouse, France. olivier.bernal@enseeiht.fr.
authors.forename: Olivier
authors.initials: O
authors.lastname: Bernal
authors.affiliation: Centre for the Development of Sensors, Instruments and Systems, Universitat Politècnica de Catalunya (UPC-CD6), Rambla Sant Nebridi 10, E08222 Terrassa, Spain. ajit.jha@cd6.upc.edu.
authors.forename: Ajit
authors.initials: A
authors.lastname: Jha
authors.affiliation: LAAS-CNRS, Université de Toulouse, CNRS, INP, 6 AllÃée Emile Monso, 31400 Toulouse, France. antonio.lunaarriaga@enseeiht.fr.
authors.forename: Antonio
authors.initials: A
authors.lastname: Luna-Arriaga
authors.affiliation: Centre for the Development of Sensors, Instruments and Systems, Universitat Politècnica de Catalunya (UPC-CD6), Rambla Sant Nebridi 10, E08222 Terrassa, Spain. carlos.yanez@cd6.upc.edu.
authors.forename: Carlos
authors.initials: C
authors.lastname: Yanez
authors.affiliation: Centre for the Development of Sensors, Instruments and Systems, Universitat Politècnica de Catalunya (UPC-CD6), Rambla Sant Nebridi 10, E08222 Terrassa, Spain. caum@oo.upc.edu.
authors.forename: Jesus
authors.initials: J
authors.lastname: Caum
authors.affiliation: LAAS-CNRS, Université de Toulouse, CNRS, INP, 6 AllÃée Emile Monso, 31400 Toulouse, France. thierry.bosch@enseeiht.fr.
authors.forename: Thierry
authors.initials: T
authors.lastname: Bosch
authors.affiliation: Centre for the Development of Sensors, Instruments and Systems, Universitat Politècnica de Catalunya (UPC-CD6), Rambla Sant Nebridi 10, E08222 Terrassa, Spain. santiago.royo@upc.edu.
authors.forename: Santiago
authors.initials: S
authors.lastname: Royo
mesh_terms: D015374:Biosensing Techniques; D056228:Feedback, Sensory; D006801:Humans; D007368:Interferometry; D055096:Optical Devices; D012815:Signal Processing, Computer-Assisted
keywords: biophotonics; biosensors; flowmetry; metrology; optical feedback interferometry; vibrometry