Polychromatic modulators


The AOTFnC is a special acousto-optic tunable filter which uses the anisotropic interaction inside a Tellurium dioxide crystal (TeO2) to control independently or simultaneously different lines from an incoming UV or VISIBLE laser light (White laser, Ar+, Kr+, HeNe, DPSS, Dye…). Up to 8 distinct lines can be mixed and separately modulated in order to generate different colorimetric patterns. The specific crystal cut of the AOTFnC produces good diffraction efficiency (> 90%), narrow resolution (1-2 nm), a low cross-talk between lines, and high extinction ratio. The large separation angle between 0 and 1st orders, as well as the excellent output chromatic colinearity (<0.2 to <0.3 mrd ) make this AOTF a powerful tool for free space or fibre pigtailed applications. Its associated thermal stabilization maintains stable diffraction efficiency and reduces dramatically beam drift with single mode fibre pigtailing. This is a major advantage for high sensitivity applications.

AA OPTO-ELECTRONIC

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Polychromatic modulators