QBH-S-Fiber Adapter

QBH-S-Fiber Adapter

7Z08349
Description: 

This fiber adapter is used for mounting fibers with QBH termination to high power sensors L1500W-BB-50, L1500W-LP2-50, 5000W-BB-50 and 5000W-LP2-50. Model QBH-S-Fiber Adapter is suitable for beams with large divergence angles.

Specification

  • Ø146mm x 177mm
  • L1500W-BB-50, L1500W-LP2-50, 5000W-BB-50, 5000W-LP2-50
  • QBH
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FAQ

Why do we have 2 types of QBH fiber adapter?

In order to measure the fiber laser power we need to assure on one hand that the beam size on the absorber is not to small so as to exceed the power density requirements of the absorber and on the other hand that the beam size is not so large that it does not fit into the aperture. This necessitates two lengths of fiber adapter, the QBH-L & QBH-S
The QBH-L (P/N:7Z08348) is suited for beams with divergence angles of up to 120 mrad (for 86% of the beam), the minimum divergence angle depends on total power and the graph in the datasheet should be consulted for exact values.
The QBH-S (P/N:7Z08349) is suited for beams with divergence angles of up to 180 mrad (for 86% of the beam), the minimum divergence angle depends on total power and the graph in the datasheet should be consulted for exact values.
For more information please contact Ophir’s representatives.

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What power sensors are recommended to use with the QBH fiber adapters?

For laser powers up to 1500W use the L1500W-LP2-50 (P/N: 7Z02772) sensor or the L1500W-BB-50 (P/N: 7Z02752) sensor.
For laser powers up to 5000W use the 5000W-LP2-50 (a) (P/N: 7Z02773) sensor or the 5000W-BB-50 (P/N: 7Z02754) sensor.
Note: (a) Please note that older versions of the above sensors do not have the requisite 4 threads on Ø70mm circle on their front flange and cannot be used with the QBH adapter

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Why not measure the fiber Laser in an open space? Why do I need the QBH adapter?

The fiber laser outputs a very high Power and concentrated beam. If any dust or foreign particle gets onto the fiber tip, it can cause a significant damage to your fiber. The enclosure of the QBH adapter excludes foreign particles and also protects the users from back scattered laser light.

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Do I need to recalibrate or add a factor to the Power sensor I already have if I choose to add the fiber adapter?

No, the light scattered from the walls of the adapter that gets back to the sensor absorber is negligible and does not affect calibration.

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