Apparatus and method for in-line measurement of laser pulses with time-dependent polarization

In-line measuring apparatus of laser pulses with time-dependent polarization, apparatus characterized by comprising:

• a selection unit (101) devoted to select a polarization component that is a reference component (112) and driving it to a standard characterization unit (160) of linearly polarized pulses for their temporal characterization,
• a birefringent system (120) which in turn can comprise at least one plate of birefringent material, with the optical axis preferably perpendicular to the direction of propagation of an incident beam to be analyzed (111), so that it decomposes the light into two polarization components, ordinary and extraordinary, traveling at different speeds through the birefringent system (120),
• a linear polarizer (130) adapted to select several polarization projections,
• a spectral analysis unit (140) in the range of the spectrum to be measured, and
• a processing module (150) of resulting data (141) of the spectral analysis unit (140).