Patent ID: 9448363
Filing Date: 2016-09-20
CPC Classification: G02B,H01S

Claim Text:
1. A device for the compensation of the time dispersion applied to the generation of ultra short light pulses comprising two identical and parallel optical diffraction gratings (RA, RB) and two prisms made of the same optical index and with the same apex angles (PA, PB) placed inside the aforesaid optical diffraction gratings (RA, RB), characterized in that the aforesaid optical diffraction gratings (RA, RB) are volume phase gratings operating in transmission on the Bragg diffraction principle, the outer faces (FeA, FeB) of the aforesaid prisms (PA, PB) being parallel to the aforesaid optical diffraction gratings (RA, RB), and the inner faces (FiA, FiB) of the aforesaid prisms (PA, PB) being parallel with each other.