Acousto-Optic AOTF Tunable Filters
An AOTF is a solid-state, electronically tunable bandpass filter,
which uses the acousto-optic interaction
inside an anisotropic medium. These filters can be used with
multi-lines sources (mixed
gas lasers, Laser diodes…) or with broadband light sources
(Xenon, Halogen lamps…). They allow to
select and transmit a single wavelength from the incoming light.
AA proposes a whole range of AOTFs based on TeO2 with
shear acoustic mode. The filters are designed
so as to get the best performances in each wavelength
range and to satisfy most of the applications:
resolution down to 1 nm, Field of view up to 20 degrees,
apertures up to 10 mm…
In most cases, the filtered output from the tunable filter
is made collinear to make easier the use of
these devices, and to satisfy fiber pigtailing conditions.
A random input polarization will be separated
into two orthogonal polarizations (order -1 and +1).
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