Design and Analysis Gires-Tournois-Interferometer Mirrors

Amer B.Dheyab (University of Technology)
Gaillan H. Abdullah (University of Technology)
Haider Y. Hammod (University of Technology)
Ali Hassan (University of Technology)

Indonesian Journal of Electrical Engineering and Computer Science
Vol 12, No 10: October 2014

We report the implementation and operation of GTI with high-reflectivity negative-dispersion dielectric mirrors for use in tunable ultrafast laser systems. The mirror structure is divided into two distinct regions: an underlying high-reflectivity dielectric quarter-wavelength stack and an overlying negative-dispersion section consisting of only a few layers and forming simple multiple Gires–Tournois interferometers. The example that we present was designed two structures with different spacers for operation from 670-860 nmand680-840nm has a near-constant group-delay dispersion of ±3000fs2and a peak reflectivity greater than 98%. We can usingand application of these mirrors in a mode-locked Ti: Sapphire laser.