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Optical Tapers

High Power Assemblies

Tapered fibers

Fiberguide’s Optical Tapers are used for mode mixing, lowering optical power density in high power applications, and converting numerical aperture (NA) in optical power delivery applications.

  Spec Sheet    

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Tapered optical fibers can be made either by fusing a short tapered section onto a longer fixed diameter fiber or by very carefully controlling the drawing process to produce a single continuous fiber with an integral tapered section. Fiberguide used the latter process since it results in superior fiber strength, alignment precision and optical power transmission. Tapered optical fibers cause optical mode mixing that tends to homogenize spatial power distribution. A larger input core diameter can prevent input damage and allow a smaller diameter pigtail for convenience in adapting to a wide range of optical applications.

Tapered optical fibers can be used as a passive optical component to alter the input and / or output divergence (N.A.) with regard to an optical fiber, as a high power coupler for laser energy, as this will spread the energy over a larger area, or simply as a device to relax tolerances in an optical system. To ensure maximum efficiency of light transmission, the numerical aperture (N.A.) of the light entering the taper input should be 0.22 divided by the taper ratio.


  • Laser marking, welding, soldering
  • Laser surgery, angioplasty, lithotripsy
  • Optical sensing
  • Spectroscopy
  • Laser delivery systems

  • Fiber Type: Single Mode, Multimode
  • Input Core Sizes: 100µm – 600µm
  • Wavelengths: Standard OH: UV – Vis: 190nm – 1250nm / Low OH: Vis – IR: 300nm – 2400nm
  • Numerical Aperture (NA): 0.12, 0.22, 0.26
  • Input-to-Output Ratios: Up to 3:1
  • Connector Options: SMA905
  • Sheathing Options:
    • Tower Drawn Tapers: PVC Tubing, Stainless Steel Monocoil
    • Micro Tapers: Rigid Stainless Steel Tubing
  • Coatings:
    • Acrylate: -40°C to +85°C / -40°F to +185°F
  • Length:
    • Tower Drawn Tapers: Minimum Taper Length – 2 meters / Overall Length < 50 meters
    • Micro Tapers: Typical Length ~ 6 inches
Please see the Spec Sheet for further information.

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