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Multimode Fiber and Patch Cables with Lensed Tips
LFM100 Lensed Fiber Mounted in a MBT616D 3-Axis Stage and HFF001 Fiber Clamp for Use in a Fiber Coupling Application
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Comparison of Beam Output for Flat-Cleaved Tip and Lensed Tip
Thorlabs' Multimode Lensed Fiber is a graded-index multimode fiber (Item # GIF50E) with a shaped tip on one end. Unlike light emitted from a flat cleaved fiber tip that diverges immediately, a fiber with a lensed tip will focus the light at a point in front of the tip. Each fiber provides a Ø25 µm spot at a 30 µm working distance. Lensed fibers are useful for applications such as coupling to and from waveguides, active device pigtailing, and waveguide packaging.
This lensed-tip fiber is available from stock as either a 1 m length of bare fiber with one scissor cut end or as a patch cable with a 2.0 mm narrow key FC/PC or SMA connector on one end. Patch cable versions are jacketed in Ø900 µm black Hytrel® tubing. The lensed tip is shipped with a protective plastic sleeve to prevent physical damage. Prior to use, the plastic sleeve should be removed and the tip cleaned gently using compressed air.
Lensed fibers are fabricated using Vytran® glass processing technology. Precise heating of the fiber end face provides a high degree of control over the curvature of the lens. Thorlabs is able to leverage our fiber processing experience to create lensed fibers using single mode, multimode, and polarization-maintaining fiber; please contact Tech Support to inquire about custom lensed fibers for your application.
LFM100 Multimode Lensed-Tip Fiber is available from stock in 1 m lengths. The non-lensed, scissor cut end can be spliced into a setup if desired, or terminated with a connector using Thorlabs fiber termination kit.
These multimode lensed-tip fiber patch cables are offered with either an FC/PC or SMA connector on the non-lensed end and Ø900 µm black Hytrel® tubing. On the end with the lensed tip, 5 ± 1 cm of the cable is left free of the tubing to expose the inner GIF50E fiber. The last 11 ± 1 mm of fiber before the lens is stripped to the cladding.