Harmonic beam splitter for high-energy lasers

Beam splitter for separating the fundamental wave and harmonics of a laser.

Regular plate harmonic beam splitter and ultra-thin harmonic beam splitter are two types. High-energy harmonic beam splitters are similar to dichroic beam splitters. They are designed to separate the fundamental wave and harmonics of a laser. Spectral Optics supplies harmonic beam splitters for Nd:YAG lasers and Ti:sapphire lasers. A single-sided high-energy dichroic coating reflects over 99.5% of the target wavelength while transmitting other wavelengths. For wavelengths longer than the target wavelength, it transmits over 90%, and for wavelengths shorter than the target wavelength, it transmits over 85%. The backside is coated with high-energy AR coating for the transmitted wavelengths. If the beam size is small, less than 3mm, a minimum deviation angle is required, and an ultra-thin beam splitter is necessary.

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