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Coherent
Fiber Optic Cables Incoupling Optics External Optics
Fiber Optic Cables
Optoskand Beam Delivery Components

The fiber optic product line has been created to deliver high power laser radiation safely from the laser to the work piece. At the same time the market demands more flexible solutions and the dream of having the laser beam from a wall plug becomes closer and closer. The result is that we continuously work to improve and further develop the possibilities with the fundamental technology.

When using an optical fiber for high power transmission, one of the main topics is to handle power losses due to misalignment, back reflections or damaged optics in the beam path. Generally the main weak points in the fiber itself are the entrance and exit surfaces, and the area where the buffer and jacket enter the fiber.

Mode stripper

In all fiber optic cables a mode stripper solution is used to clean the cladding from unwanted back-reflected radiation before the buffer/jacket enters the fiber. It makes the radiation leak out of the cladding where it is easier to dissipate and cool away.

Quartz block

All fiber optic cables are equipped with a quartz block at the fiber end. This results in three main advantages:

Internal cooling

In some of the fibers (QBH and QD) the volume behind the quartz block is filled with circulating cooling water. This means that the radiation removed from the cladding by the modestripper is directly absorbed in water, rather than being absorbed in a metal part that is water-cooled. This patented technology has proved to be very efficient and power losses in the range of kilowatts can be cooled away.

Compare our fibers

QBH
RQB
QD
Q5
QCR
QCS
SMAQ
Mode stripper
Yes
Quartz block
Yes
Water-cooled
Yes
No*
Yes
No
No
No
No
Integrated collimating lens
No
No
No
No
Yes
Yes
No
Integrated sensors
No
No
Yes
No
No
No
No
AR-coatings
1030-1090 nm 780-1100 nm 510-550 nm
1030-1090 nm
1030-1090 nm 1530-1570 nm
780-1100 nm
Fiber core
SM-1000 µm,round/square
SM-300 µm
SM, LMA
50-300 µm
Power handling (CW)
10 kW
1.5/3.0 kW
20 kW
5 kW
750W
300W
500W
Transmission losses
< 3%, typical 1%
Compatible interface
LLK-Q HLC-8/LC-8
LLK-D LCA LLK-Auto
LLK-B LLK-HP
Ø30 mm
Ø14 mm
SMA905**


*External cooler available **z-plane moved 25 mm
The table above is for guidance only.

Call 1-800-227-8840


Outside the U.S. 1-408-764-4983

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5100 Patrick Henry Drive
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email: tech.sales@coherent.com

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