Lasers utilizing media such as Ti:Sapphire or LiSAF have a broad spectral bandwidth and an ability to emit pulses of ultra-short duration.

When working with ultra-fast lasers it is necessary to pay attention to bandwidth reduction dispersion broadening introduced by optical elements in the system. Mirrors used must have a high reflectance over a broad bandwidth. They must also be designed to have a low phase shift, group velocity dispersion and not to introduce significant levels of cubic and higher order terms.

Coatings are usually highly dispersive elements but a combination of careful design and controlled deposition can yield high reflectors suitable for use with ultra-fast lasers.

These ultra-fast reflectors operate over a broad bandwidth from 730-800 nm and provide greater than 99.5% reflectance over this range. They have a linear phase response and low levels of high order terms as shown.

Either normal incidence or 45° reflectors can be supplied on a range of substrates from 12 to 76 mm diameter.