Countermeasures
One defense against laser dazzlers are narrowband optical filters tuned to the frequency of the laser. To counter such defense, dazzlers can employ emitters using more than one wavelength, or tunable lasers with wider range of output. Another defense is photochromic materials able to become opaque under high light energy densities. Non-linear optics techniques are being investigated: e.g. vanadium-doped zinc telluride (ZnTe:V) can be used to form electro-optic power limiters able to selectively block the intense dazzler beam without affecting weaker light from an observed scene.
Read more about this topic: Dazzler (weapon)