9/22/03

ARO Introduces Dichroic Optics for Laser Harmonic Separation

Alpine Research Optics (ARO, Boulder, CO) has introduced a comprehensive line of dichroic coatings and beamsplitters for use in separating the various harmonics of solid state lasers.  The standard product line includes short wave pass and long wave pass optics optimized for 1064 nm, 532 nm, 355 nm, and 266 nm operation.  These OEM optics are targeted at laser manufacturers as well as systems integrators in applications such as semiconductor metrology and micromachining.

These flat optics are intended for first surface operation at 0° & 45° incidence, and have a high efficiency anti-reflection coating on the second surface.  Standard beamsplitter products are offered up to 3.00” and l/10 flatness, with other sizes available upon request.  The 1064 nm and 532 nm beampslitters use optical grade fused silica substrates and the ultraviolet beamsplitters are fabricated on UV fused silica substrates. 

These optics draw on ARO’s experience in developing and manufacturing high damage threshold optics for demanding application such as the LLNL/NIF project.  Specifically, both the substrate and coating are specially prepared in order to ensure a high damage threshold and long operational lifetime.  The unique design of these coatings means these optics are ideal for use with high repetition rate low energy pulses characteristic of diode-pumped lasers.  And their high damage threshold also makes them well-suited for use with low repetition rate high energy pulses as produced by lamp-pumped lasers.