Crystal Optics

Source: Gooch & Housego PLC

Gooch & Housego demonstrates expertise in its ability to grow, orient, fabricate, finish, coat, and mount crystals from a variety of materials in housings from 3 mm to larger than 300 mm. Crystal materials such as BBO, CdS, CdSe, KDP, and KD*P are used in many devices including acousto-optic modulators, lithium niobate Mach-Zehnder modulators, Pockels cells, waveplates, and harmonic generating crystals. G&H is able to measure insertion loss, uniformity of birefringence, and other important crystal characteristics at their extensive facilities specializing in transmission and reflection interferometry.

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Lithium Niobate (LN) Wafers

As one of the most versatile and well-developed active optical materials, Lithium Niobate, or LN, is used in a wide range of applications such as electro-optics, acousto-optics, nonlinear optics, and guided-wave optics. To shape this crystal into its final form, optical wafers will undergo poling, shaping, slicing, edge grinding, lapping, polishing, inspection and measurement. Fundamental properties include wide transparency range, high electro-optic and non-linear coefficients, very high electro-mechanical coupling coefficients, and chemical and mechanical stability.

Periodically Poled Lithium Niobate (PPLN)

Periodically Poled Lithium Niobate (PPLN) nonlinear crystals from G&H are designed to permit efficient wavelength conversions in the visible to 5 µm range. A lithographically defined and highly customizable poling pattern allows crystals to be used in a wide range of wavelength conversion applications including range finding, countermeasures, chemical fingerprinting, laser display, laser cooling, and microscopy.


Non-Linear Optics

Nonlinear optic (NLO) crystals are designed and produced for many nonlinear conversion applications ranging from deep UV to extreme IR wavelengths. Available materials include β-Barium Borate (BBO), Cadmium Selenide (CdSe), Cadmium Sulfide, (CdS), Potassium Di-hydrogen Phosphate (KDP), and Potassium Di-deuterium Phosphate (KD*P). Nonlinear produced crystals are utilized in many applications including IR waveplates, MIR harmonic generators, Pockels cells, waveguides, low pass filters, and Wollaston prisms.

For more information regarding features, specifications, and parameters for each type of product, download the available datasheets, or contact Gooch & Housego.