Abstract: It is described a process for producing transparent ceramic bodies with at least two zones having different garnet composition, in particular in which one of said zones has composition Y3AI5O12. The invention is especially useful for the production of transparent ceramic bodies having preset complex shapes and/or a controlled complex distribution of doping ions.

Abstract: In a method for detecting flaws in continuous laser welding processes, including a sensor measures plasma emission spectrum in a range of wavelengths between ?max and ?min in N channels, each measuring radiation strength emitted in the band centered at wavelength ?i (1?i?N) and width ??i. Deviation detection is based upon calculating intensity relationships of signals measured at specific wavelengths and in comparison with pre-determined threshold values. A calibration phase ensures a series of K weldings is performed, under optimized conditions, for each a number J of spectra OJ,K, is acquired, each one corresponding to a vector of N intensity values at wavelengths ?i, 1?i?N, and a series of weldings K? is then performed, (K??K), a single welding parameter A is altered by a known quantity, for each welding being acquired a sequence of J? spectra AJ?,K?, (J??J), which are stored.

Abstract: In a method for detecting flaws in continuous laser welding processes, including a sensor measures plasma emission spectrum in a range of wavelengths between ?max and ?min in N channels, each measuring radiation strength emitted in the band centred at wavelength ?i (1?i?N) and width ??i. Deviation detection is based upon calculating intensity relationships of signals measured at specific wavelengths and in comparison with pre-determined threshold values. A calibration phase ensures a series of K weldings is performed, under optimized conditions, for each a number J of spectra OJ,K, is acquired, each one corresponding to a vector of N intensity values at wavelengths ?i, 1?i?N, and a series of weldings K? is then performed, (K??K), a single welding parameter A is altered by a known quantity, for each welding being acquired a sequence of J? spectra AJ?,K?, (J??J), which are stored.