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Multimode Lensed Fiber
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' LFM100 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 lensed fiber will focus the light at a point in front of the tip. The LFM100 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.
The lensed tip is shipped with a protective plastic sleeve that prevents physical damage to the tip. Prior to use, the plastic sleeve should be removed and the tip cleaned gently using compressed air. The non-lensed end of the fiber is terminated in a scissor cut, which can be integrated into an experimental setup in two ways. It can be cleaved and then terminated with a connector using a fiber termination kit or spliced into the setup.
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.