3. Diffraction grating metrology

3.1 Optical characterization

Precise knowledge of the optical properties of the pulse compression grating is essential for optimum control of laser beam propagation during compression. At a minimum, these optical properties are diffraction efficiency and diffracted wave surface quality.

Diffraction efficiency is characterized using a photometer [R6410] at the grating's operating incidence, wavelength and polarization. Depending on requirements and available equipment, diffraction...