Ultrashort Laser Pulse Phenomena, 2nd Edition

Dispersion of Interferometric Structures 73

should be affected. What is physically happening in the time domain is that the

various dielectric layers of the coating accumulate more or less energy at different

frequencies, resulting in a delay of some parts of the pulse. Therefore, significant

pulse reshaping with broadband coatings occurs only when the coherence length

of the pulse length is comparable to the coating thickness. Pulses of less than

30 fs duration were used in Weiner et al. [9, 10]. As shown previously, deter-

mination of the dispersion in the frequency domain can be made with a simple

Michelson interferometer. The latter being a linear ...