Bragg thickness criterion for intracavity diffraction gratings

Ludivine Menez (1) , Isabelle Zaquine (1) , Alain Maruani (1) , Robert Frey (2, 1)

1 TSI - Département Traitement du Signal et des Images
2 Laboratoire Charles Fabry de l'Institut d'Optique / Manolia

The grating thickness limit lFP between the Raman-Nath and the Bragg diffraction regimes is calculated for an index grating placed in an asymmetric Fabry-Perot resonator with a totally reflecting back mirror and compared with that which was obtained for the same grating with no cavity lM . Owing to the increase of the effective interaction length inside the Fabry-Perot cavity, the stronger the front mirror reflectivity R1 of the cavity, the smaller the thickness above which the whole diffracted intensity can be concentrated into one unique diffracted beam: lFP=[(1−√R1)/(1+√R1)]lM/2.

Domaines: Optique [physics.optics]

Ludivine Menez, Isabelle Zaquine, Alain Maruani, Robert Frey. Bragg thickness criterion for intracavity diffraction gratings. Journal of the Optical Society of America B, 2002, 19 (5), pp.965. ⟨hal-00862351⟩