A dispersive mirror, also known as a Gires–Tournois interferometer (GTI) mirror, is an optical standing-wave resonator designed for generating chromatic dispersion. These mirrors are used mainly for pulse compression in Yb:YAG and Yb:KGW femtosecond lasers, but can be optimized for other wavelengths, such as in Ti:Sapphire laser systems.

Compared to prism or grating pulse compression systems, dispersive thin-film mirrors exhibit lower losses and lower sensitivity to mechanical misalignment errors, enabling a simpler and more stable laser.

We design standard items for most common laser wavelengths and dispersion values, but Altechna also offers custom-designed dispersive mirrors in terms of wavelength, size and GDD. It is worth mentioning that our dispersive mirrors are coated with sputtering technology, ensuring a high level of performance and durability.

Contact us for help with your challenge. We have a team of experienced coating engineers and metrology capabilities to prototype and transfer your idea into a well-defined production process.