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Fiber End Caps![]()
FEC1 Ø1 mm End Cap FEC15 Ø1.5 mm End Cap FEC5-1064 Ø5 mm End Cap with Taper, FEC8S-1064 Ø8 mm End Cap with Taper and Stem, Application Idea FEC8S-1064 End Cap Spliced onto a Ø400 µm Core Fiber Related Items
![]() Please Wait ![]() Click to Enlarge Image of an FEC5-1064 Ø5 mm end cap with tapered lead-in prepared for splicing in the GLZ4001EC CO2 End Cap Splicer. ![]() Click to Enlarge Coupling Light into and Out of Standard Fiber vs. End-Capped Fiber Features
Thorlabs' UV fused silica end caps range in size from Ø1 mm to Ø8 mm. End caps with a 5 mm or 8 mm cap diameter have either a stem or tapered lead-in on one end to simplify splicing them onto a fiber. They are also available with a 1064 nm antireflection coating on the side opposite the taper to reduce back reflections. Complete specifications along with profiles and dimensions are in the table below. Each end cap is coreless (no waveguide) to allow the incoming light to expand evenly in the homogeneous material. When spliced onto a fiber, the end cap reduces the intensity at the air-to-glass interface of the fiber face to prevent potential damage from high-power sources, such as Q-switched lasers or fiber amplifiers. End caps can also be used to seal off the air holes in photonic crystal fiber to prevent water from entering. Application Note
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