title: A real-time spectroscopic sensor for monitoring laser welding processes.
abstract: In this paper we report on the development of a sensor for real time monitoring of laser welding processes based on spectroscopic techniques. The system is based on the acquisition of the optical spectra emitted from the laser generated plasma plume and their use to implement an on-line algorithm for both the calculation of the plasma electron temperature and the analysis of the correlations between selected spectral lines. The sensor has been patented and it is currently available on the market.
authors.affiliation: CNR-INFM Regional Laboratory LIT , via Amendola 173, Bari, Italy; E-Mails:  ancona@fisica.uniba.it  (A.A.);  v.berardi@poliba.it  (V.B.);  lugara@fisica.uniba.it  (P.L.).
authors.forename: Teresa
authors.initials: T
authors.lastname: Sibillano
authors.forename: Antonio
authors.initials: A
authors.lastname: Ancona
authors.forename: Vincenzo
authors.initials: V
authors.lastname: Berardi
authors.forename: Pietro Mario
authors.initials: PM
authors.lastname: Lugarà