© 2016 SPI Lasers UK Ltd.
Commercial in Confidence
SM-S00500 Revision A 21 October 2016
redPOWER QUBE Cased Fiber Laser User Manual
isolators), as is common with other fiber lasers, bringing cost and processing
disadvantages. The protection offered by the QUBE Fiber Laser comes from the design of
the optical connector and the use of sensors to monitor the back-reflected power. In
extreme cases, the QUBE Fiber Laser shuts itself down before damage occurs.
The optical connector incorporates the SPI Lasers patented
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technology, which channels
back-reflected power away from the delivery fiber via a capillary tube into a water cooled
beam dump, as shown in Figure 6, preventing damage to the delivery fiber or its
mechanical fixings.
Figure 6 PIPA-Q Optical Connector with Protection Against Back-Reflection
Thermal monitoring is also used within the optical connector and optical engine to protect
the QUBE Fiber Laser against back reflected power. If a temperature threshold is
exceeded a warning is generated. When the temperature falls below the threshold the
warning will clear. If higher temperature threshold is exceeded an alarm is generated and
the QUBE Fiber Laser will shut down. The QUBE Fiber Laser can be restarted when the
temperature falls below the threshold after the alarm has been cleared.
When processing highly reflective materials such as brass, copper and aluminium, or if in
doubt, contact SPI Lasers for applications advice.
Alignment Laser
An alignment laser provides a visible guide for the alignment of process heads. The
alignment laser is a Class 2 laser, meaning that it is safe to view the beam on a diffuse
work piece, although it is not safe to stare into the beam.
Power Supply Unit (PSU)
The Power Supply Unit (PSU) converts the AC electrical supply input to a low voltage DC
output to supply electrical power to the pump diodes in the PRISM FL Module and to the
FVCU.
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US5179610, GB2255199
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