Acousto-Optic Frequency Shifters
Special models without any polarization or depolarization effects
Acousto-optic frequency shifters from Intra Action Corp. are available for a wide frequency shift range and lasers with wavelengths starting in the UV range and extending as far as MIR.
Its design is primarily geared toward a high diffraction efficiency for the desired frequency shift. Intensity modulation with moderate switching times is possible too.