…geometry of the beam. For best results, the beam should be
circularly symmetric and near Gaussian.
Within this category Coherent offers a knife-edge
instrument called the BeamMasterTM.
Knife-edge scanners cannot generate truly accurate threedimensional…
…if only radially symmetric questions are asked
about the beam properties, only three constants are needed to define
the beam, and these are independent of azimuth. Chief among these
"radially symmetric questions" would be to ask what the transmission of the beam is through a round…
…beamsplitters are used to sample the watt-level (~1 mJ @ 1 kHz) beam from the hollow fiber. The beam entering the beam
dump would in general be available for experiments.
The Coherent Astrella is an example of the latest generation of one-box Titanium:sapphire
2, we used a mask projection system capable of generating
laser energy densities of more than 10 J/cm2 at the sample
surface and field sizes of up to 1 mm2. The mask was
fabricated to create a square symmetric array of TGV holes
with a nominal hole diameter of 25…
…- 150 milliwatts). Important for focused beam applications like flow cytometry, they all deliver a TEM
beam, with the option of symmetrical circular beam cross-section at several wavelengths.
Dubelaar explains, "The beam shaping in
our instruments is more…