The group delay of multilayer laser mirrors was measured by determining the spectral position of transmission maxima of a Fabry–Perot interferometer formed by the mirrors to be characterized. By optimizing the spacer thickness, we obtained an accuracy of the group-delay measurement of better than 0.23 fs. To our knowledge, this is the most precise direct measuring method reported.
© 1995 Optical Society of America
Original Manuscript: June 23, 1995
Published: November 15, 1995
K. Osvay, R. Szipöcs, G. Kurdi, J. Hebling, A. P. Kovács, and Z. Bor, "Measurement of the group delay of laser mirrors by a Fabry–Perot interferometer," Opt. Lett. 20, 2339-2341 (1995)