CIOP   05384
CENTRO DE INVESTIGACIONES OPTICAS
Unidad Ejecutora - UE
congresos y reuniones científicas
Título:
DEVELOPMENT OF A SYSTEM BASED ON SWEPT-SOURCE OPTICAL COHERENCE TOMOGRAPHY FOR INDUSTRIAL METROLOGICAL APPLICATIONS
Autor/es:
JORGE TORGA; NELIDA ARACELI RUSSO; ENEAS N. MOREL; RICARDO DUCHOWICZ
Lugar:
Pucon
Reunión:
Conferencia; Riao Optilas 2016; 2016
Institución organizadora:
RIAO-OSA_SPIE
Resumen:
This paper describes the development and implementation of an interferometric system based on the technique of Swept-Source Optical Coherence Tomography (SS-OCT) [1-3] to meas-ure distances of several centimeters (> 10 cm) and the thickness of transparent and semi-transparent objects. The proposed scheme utilizes as light source a tunable erbium doped fiber laser with a ring-like configuration, which has a spectral width of 20 pm and a sweep range from 1520 to 1570 nm [4]. It also has sufficient coherence length to allow imaging of great depth. The interferometric sig-nal is registered by using an InGaAs detector in conjunction with an oscilloscope. Different auto-calibration schemes are discussed in terms of both time and wavelength, in order to counteract the possible variation in the scanning speed of the laser caused by the tuning module. The correspond-ing experimental configurations are presented as well as the results obtained in testing system func-tionality using a broadband source and an optical spectrum analyzer (OSA). In addition, measure-ments made on a glass cuvette are shown, in which the wall thickness and the distance between them are measured, demonstrating the potential of the proposed scheme for performing quality con-trol in industrial applications. The configuration shown allows extending the measurement range obtainable with standard OCT systems [5,6].