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DataRay Inc. - ISO 11146-Compliant Laser Beam Profilers
Photonics Dictionary

mandrel

A shaft, spindle or any object generally passed through a workpiece to hold, support or shape a particular piece during its machining process or its practical use. In fiber optics, optical fibers are often wrapped around a cylindrical mandrel rod to attenuate the optical power within the higher order modes of a multimode optical fiber, or to impose true single mode propagation for single mode fibers.
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