Tapetado Moraleda, AlbertoDíaz Álvarez, JoséMiguélez Garrido, María HenarVázquez García, María Carmen2016-02-182016-02-182016-02-15Journal of Lightwave Technology, 34 (2016) 4, February, 15, pp. 1380 - 13861558-2213 (online)0733-8724 (print)https://hdl.handle.net/10016/22329A fast fiber-optic two-color pyrometer operating on the optical communication bands is designed for temperature measurements in machining processes. Off-the-shelf low-loss fiber-optic demultiplexers and optoelectronics equipment are used in order to obtain a cost-effective sensing solution while reducing both the temperature measurement error and the minimum measurable temperature. The system is capable of measuring highly localized temperatures without using collimation lens. The designed pyrom-eter allows measuring temperature in the range from 300 to 650 °C, achieving a full-scale temperature error as low as 4%. Factors in-fluencing the temperature measurements are studied in order to identify the sensor limitations, such as a possible damage on the end of the optical fiber, the spectral loss attenuation and responsivity, or the distance between the fiber end and the target. Finally, this pyrometer is applied in a turning process, using a fiber-optic sensor embedded on a standard tool holder. Temperature measurements on the Inconel 718 are reported showing a good agreement with the simulations.7application/pdfeng© 2016 IEEEDemultiplexerFiber-opticsMachining processTemperature measurementTwo-color pyrometerWavelength divisionMultiplexingresearch articleElectrónicaIngeniería IndustrialÓptica10.1109/JLT.2015.2513158open access138041386Journal of Lightwave Technology34, 4-FebruaryAR/0000017657