[INVITED] New advances in fiber cavity ring-down technology. (April 2016)

• Record Type: Journal Article
• Authors: Silva, S.O.; Magalhães, R.; Marques, M.B.; Frazão, O.
• Is Part Of: Optics & laser technology. Volume 78: Part B (2016)
• Page Start: 115
• Page End: 119
• Publication Date: 2016-04
• Subjects: Cavity-ring down -- Optical fiber sensor -- Applications; Optics -- Periodicals; Lasers -- Periodicals; Electronic journals; 621.366
• DOI: 10.1016/j.optlastec.2015.10.006
• Languages: English
• ISSNs: 0030-3992

Abstract

Abstract: A brief review in the cavity ring-down technique (CRD) is presented. In this review, there will only be considered the conventional fiber CRD configuration, i.e., there will only be presented researches involving cavities with two couplers with 99:1 ratios, due to the large amount of publications involving this spectroscopy method. The presented survey is divided in different topics related to the measurement of physical parameters, such as strain and temperature, curvature, pressure, refractive index, gas and biochemical sensing. Highlights: It is a brief review on cavity ring down. A new lines of research is the use of existing equipment on the market for long range measurement. Another line of investigation is signal processing that makes the CRD a quick acquisition system and allows analysis in real time. The use of the add-signal as a new solution presents greater sensitivity when the sensor is subjected to external parameters. Finally it was presented the CRD in various applications from the measurement of deformation to gas monitoring. It is clearly that its application in the future will in medicine, biomedical and chemical areas of research.