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Donut

Microsoft Word - Understand Different Laser Beam  Rev 1 Final.doc

Microsoft Word - Understand Different Laser Beam Rev 1 Final.doc

…substrate if one beam features a Gaussian or near-Gaussian profile (maximum intensity in the beam center), while the other beam features a so-called donut profile (very little power in the beam center). Theory can sometimes predict the behavior of a beam, but manufacturing tolerances in lenses and…

Bio Photonics - April 2015

Bio Photonics - April 2015

…STED works.
A donut-shaped laser beam is coincident
with a TEM
00
(Gaussian profile) beam of
a different wavelength. The donut beam
depletes the population of excited fluorophores via stimulated emission. This beam
shape serves to constrict the volume of

Microsoft Word - Coherent whitepaper Cube performance Final0910

Microsoft Word - Coherent whitepaper Cube performance Final0910

…portion of the beam.
Closer examination of the false color beam intensity
map from the CCD camera indicates the slight
appearance of a donut mode. Figure 2 shows a 640
nm laser where again the 84/16 beam data met
specification. But this time, increasing the data set to

Microsoft Word - Understanding Laser Beam Parameters Leads to Better System Performance and Can Save Money Final.doc

Microsoft Word - Understanding Laser Beam Parameters Leads to Better System Performance and Can Save Money Final.doc

…on a substrate if one beam features a Gaussian profile (maximum
intensity in the beam center) while the other beam features a so-called donut profile (very little to no power in the
beam center). In fact, there are many material-processing related applications such as cutting, welding,…

ModeMaster PC User Manual

ModeMaster PC User Manual

…can be made to agree exactly with the variance-based width definition for two modes, which he picks to be the
first two (the fundamental and donut modes). As the order of the
mode or mixture of modes increases, a difference between the knife
edge and variance-based beam widths is…