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Periodically-Poled Crystals

PPLN Chips & Waveguides

The periodically-poled crystals are available as bulk or waveguide chips. HCP’s PPLN waveguide technology allows for highest conversion efficiency. [More]

PPLN Mixers

The PPLN technology incorporated in a ready-to-use, compact and alignment-free package. Plug & Play, reliable and maintenance-free! [More]


Oven and Temperature Controllers from HCP, perfectly suitable for all PPLN crystal products. [More]

The periodic-poling (PP) technology is an efficient laser wavelength conversion technology employing quasi-phase matching (QPM). By microstructuring suitable ferroelectric materials, e. g. lithium niobate (LN) or lithium tantalate (LT), the highest non-linear coefficients can be employed to achieve high conversion efficiencies even at lowest input powers. The sophisticated manufacturing process allows for the engineering of PPLN or PPLT crystals tailored for arbitrary frequency conversion processes for full spectrum applications. All periodically-poled crystal products are manufactured by GWU’s partner HC Photonics, a pioneer of the PPLN/PPLT technology.

GWU-Lasertechnik has more than 30 years of experience in supplying crystals, optics and accessories for lasers and laser applications. GWU’s dedicated service helps to find the best core components for your application. As GWU is not only a distributor but also a well-known manufacturer of laser devices, a wide knowledge and in-field experience can be shared to the advantage of our customers. Ask us if there are any questions about periodically-poled crystals.