In-fiber Mach–Zehnder interferometer as a promising tool for optical nose and odor prediction during the fermentation process
Renato Luiz Faraco Filho, Felipe Oliveira Barino, João Victor Calderano, Ítalo Fernando Valle Alvarenga, Deivid Campos, Alexandre Bessa dos Santos
Abstract
In this paper, we present an in-fiber Mach-Zehnder interferometer (MZI) applied to coffee bean fermentation monitoring. Two MZIs, based on a combination of a fiber taper cascaded by a micro-tapered long-period fiber grating, were installed in a fermentation barrel to monitor the liquids and gases released during the fermentation process. During this process, a variety of odors arise due to the yeast activity and their classification is important to decide when to stop the fermentation process. In this work, we show that the in-fiber MZIs are good candidates for optical noses in this scenario.
Topics & Concepts
InterferometryMach–Zehnder interferometerOptical fiberFiberOpticsFiber optic sensorMaterials scienceProcess (computing)FermentationFiber Bragg gratingInterference (communication)Computer sciencePhysicsTelecommunicationsChemistryFood scienceComposite materialOperating systemChannel (broadcasting)Advanced Fiber Optic SensorsAdvanced Chemical Sensor TechnologiesInsect Pheromone Research and Control