Compact double-pass AOM
PTB-News 2.2020
29.04.2020
Diagrammatic sketch of the double-pass AOM prototype
Acousto-optic modulator systems (AOMs) are used to modulate the frequency and the intensity of laser radiation. If a beam passes twice through an AOM, this allows the frequency shift to be doubled while at the same time suppressing the primary beam frequency adequately. Such a setup is called a double-pass arrangement. Our new PTB design is based on a specific convolution of the beam path for use in the ultraviolet spectral range. The disadvantages of conventional UV double-pass setups are thus eliminated by keeping the beam focus off the mirror surface, so that the mirror no longer runs the risk of being destroyed. In addition, the overall setup exhibits a much more compact design. (Technology Offer 505)
Advantages
keeping the focus off the mirror surface
no beam displacement
compact design
Contact person for questions about technology transfer
Andreas Barthel,
Phone: +49 531 592-8307, 
andreas.barthel(at)ptb.de, 
www.technologietransfer.ptb.de/en