When the shorter-wavelength green laser beam
hits copper, the metal absorbs rather than reflects most of the energy-and absorbs it faster than it can conduct it away-causing heat to build up and the melting to proceed as required.
The laser beam
is pumped by a Ti:sapphire with the pulse repetition rate of 1 kHz.
This research made use of 'ultra-pure' diamonds to concentrate multiple laser beams
into a single output.
RMI's laser beam
expanders are made with high precision plano-concave and plano-convex lenses - available in a wide range of materials.
The unlawful use of laser beams
and devices near airports will now be penalised, according to the UAE General Civil Aviation Authority (GC).
The ponderomotive nonlinearity plays an important role in self-focusing of laser beam
due to expulsion of the electrons from the focal spot.
"We use an ultra-short-pulse laser of modest energy to make a laser beam
so intense that it focuses on itself in air and stays focused in a filament," he added.
The data, sent over 50 kilometers (31 miles) on a single laser beam
, was coded thanks to a system known as orthogonal frequency-division multiplexing (OFDM) in which the laser beam
is divided into separate colour streams.
Tokyo, July 20, 2010 - (JCN Newswire) - Professor Hiroyuki Yokoyama of the New Industry Creation Hatchery Center (NICHe), Tohoku University, and Advanced Materials Laboratories, Sony Corporation, have succeeded in jointly developing a blue-violet ultrafast pulsed semiconductor laser(2) with dramatically improved peak laser beam
output levels that are 100 times that of the world's current highest levels(1).
The high power density required for keyhole welding of steels is achieved by focusing the laser beam
power (>1 kW) to a small focus spot of diameter 0.1-0.5 mm.
Regarding the laser beam
the most common ways to quantify the beam quality are: