Damage-resistant mirrors

Saint-Gobain Crystals has expanded the company's Alpine Research Optics brand of laser-grade optics with a new series of high reflectors specifically optimised for use with q-switched, solid state (Nd:YAG, Nd:YVO4 and Nd:YLF) lasers operating in the near infrared and visible spectrum (1064nm, 1053nm and 532nm).

The coatings on these beam delivery optics are designed to withstand high peak fluences and deliver more than 99.5 per cent reflectivity, without sacrificing lifetime or mechanical durability.  The coatings are intended primarily for laser applications in micromachining and microstructuring in semiconductor fabrication, flat panel display production, solar cell processing and medical device manufacture, as well as a wide range of marking tasks.

The standard versions of these high-power, solid-state laser reflectors are supplied on 1-inch (25.4mm) or 2-inch (50.8mm) diameter fused silica substrates. They have a specified flatness of λ/10 (at 633nm) and a laser grade surface quality of 10-5 (over an 85 per cent clear aperture).  Coatings optimised for either 0° or 45° angle of incidence are available.

In addition to these standard reflectors, Saint-Gobain can readily produce laser mirrors customised in virtually every aspect, including size, shape, substrate material, surface specifications and reflectivity.