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effective beam diameter

Helios Whitepaper2014.pdf

Helios Whitepaper2014.pdf

…particular, the Helios laser enables a large process
window for crack free marking. It can be used with
pulse energies of 40 to 60 µJ at beam diameters of
about 20 µm. The visibility of the color marks can be
varied over a wide range by choosing the proper laser
parameters.…

PHO v1 sstr std

PHO v1 sstr std

…and pulsed lasers (with pulsewidths down to the nanosecond range) material removal is based on a photothermal interaction. Here, the focused laser beam acts as a spatially confined, intense heat source. Targeted material is heated up rapidly, eventually causing it to be vaporized (essentially boiled…

CMM 11.1.indd

CMM 11.1.indd

…stents
and catheters, where cut edge quality
and stent-strut tolerance is critical. The
fixed beam tube cutter uses fixed optics
to deliver the focused beam to the
workpiece mounted to a moving stage
with four axes of motion, three translation
(X, Y, Z)…

Photonics Spectra - September 2015

Photonics Spectra - September 2015


Specifically, depth of field -- the distance
over which the beam size increases by a
factor of 2 -- is related to laser wavelength () and input beam diameter (D) by:
Thus, for a given input beam diameter,
depth of focus increases as wavelength
decreases. The benefits…

Photonics Spectra - June 2017

Photonics Spectra - June 2017

…increasing the pump diode power. And the
OPSL output can be smoothly adjusted
from a few percent to maximum power
with no effect on beam quality or beam
pointing; this technology does not suffer
from thermal lensing, which prevents
wide power adjustment in diode-pumped…

Biosafety Level 3 setup for multiphoton microscopy in vivo

Biosafety Level 3 setup for multiphoton microscopy in vivo

…A telescope adapts the beam diameter for the scanhead. Positon sensitive 4Q-diodes help
alignment control of the laser beam into the scanhead. Inside the scanhead, light passes a variable three-lens
telescope that is used to adapt the beam diameter to the objective lens entrance…

COHR Femtosecond Amplifier Provides Turnkey Access to Extreme Operating Regimes WP.pdf

COHR Femtosecond Amplifier Provides Turnkey Access to Extreme Operating Regimes WP.pdf

…power is required for the d-scan measurement head, so beamsplitters are used to sample the wattlevel (~1 mJ @ 1 kHz) beam from the hollow fiber. The beam entering the beam dump would in general be available
for experiments. (Inset shows typical d-scan output data in the time domain, both…

AILU Abdolvand 0216.pdf

AILU Abdolvand 0216.pdf

…to make a mark without inducing any peripheral damage due to excessive thermal effects. Ongoing research at the University of Dundee shows that there are other types of marks that can only be produced effectively and affordably with picosecond lasers. Here we describe three very different examples…

Lasers | Photonics Handbook®

Lasers | Photonics Handbook®

…are achieved when the pulse-to-pulse overlap is
in the range of 50 to 70 percent. In other words, the beam deflection mechanism moves the beam about one-third of the beam diameter before the arrival of
the next ultrafast pulse. Consequently, a repetition rate in the range of tens of…

Coherent Whitepaper - Astrella Tisch Sphere FINAL.pdf

Coherent Whitepaper - Astrella Tisch Sphere FINAL.pdf

…compression/control
and temporal measurement in a single unit. Second, it is a robust self-contained tool that is
very tolerant of input beam misalignment (even ± a few degrees) and therefore quick to set up.
Third, it is fast, providing a complete pulse characterization (phase and…

Industrial Photonics - October 2017

Industrial Photonics - October 2017

…the
well, which can be many years. In order to withstand
pressure effects and abrasion over this period, they are
typically fabricated from steel tubing with a 10-mm
wall thickness. Tube diameter ranges from 20 to 30 cm,
and the lengths range from 5 to 12 meters.…

Bio Photonics - November 2014

Bio Photonics - November 2014

…using
macroscopic, collimated beams: adding
a second laser, then a third and so on.
This necessitates the cost and complexity of dichroic beamsplitters, polarizers
and wave plates at each successive laser
wavelength. Then the collinear beams
have to be carefully coupled…

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