At the heart of the system is U.S. Laser's
unique laser head. The
laser head is based on a single lamp, single
ellipse, close-coupled design, optimized for maximum pumping
efficiency. The design produces up to 700 watts with a small
diameter (6.3 mm) rod. The single lamp reduces consumable
costs, while the high efficiency reduces the energy and cooling
requirements as well.The laser
head design allows for easy
cascading of heads, in a series periodic resonator. Single
and two-head systems are standard, and four-head systems are
An important feature of the design is that it is
tunable: the output power can be smoothly varied from <20% to
100% of rated power without any anomalies in the beam characteristics.
U.S. Laser can also provide high
brightness variants of the basic lasers, where the maximum power has
been slightly reduced to significantly improve the beam
quality. This is especially useful in laser cutting.
Power Supply - Cooling Console
The electronics and cooling system, in standard
systems, are housed in a caster-mounted console. The closed
loop cooling system features a proportioning valve controller to
maintain constant head temperature, and a high efficiency heat
exchanger for connection to external cooling water/chiller.
The electronics include a high efficiency switching
power supply, and a control unit with status monitoring and
protection. All of these lasers may be computer controlled
via digital and analog inputs. Optional IEEE 488/RS232/RS422
computer interfaces are available.
The laser heads, in
standard systems, are contained in an enclosure consisting of a tooling
plate base and a hinged, interlocked cover. An optional air
filtration system provides a clean, positive pressure, environment for
the optics, to protect against environmental dust.
Laser Beam Delivery
U.S. Laser's High Power CW Lasers are available
with both conventional and fiber optic beam delivery systems.
Particular attention was paid to power handling and transmission
capabilitiy to maximize power on target, and minimize optical element
heating. All lens elements are fused silica, and are sized based on the
full beam diameter or fiber numerical aperture.All surfaces are high
damage resistant antireflection coated to provide minimum power loss.
Multiple headed systems are also available with an
integrated cabinet. These systems fully enclose the laser head and
optics, power supplies and cooler in a common environmentally sealed
enclosure. The laser head and optics are mounted on a granite base to
insure maximum stability, and the optics are water cooled. The interior
of the cabinet is temperature stabilized for use in harsh factory
environments. The laser and optics are easily accessible for service
and alignment from the hinged cover assembly, while removable panels
provide access to the rest of the system. Normally the system is
controlled and monitored via an external control computer which is
supplied by the customer. An optional touch screen control box is also
U.S. Laser offers a variety of
standard and custom work area enclosures to complement the high power lasers.
CDRH Class I and Class IV enclosures are
available. The laser systems can
also be easily integrated into existing CNC or robotic
laser enclosure shown with optional fiber optic beam delivery.