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Sculpted Tips Integral with Optical Fibers Tapers or cones can be formed at the end of an optical fiber. As mentioned before in Fiber Optics and Optical Fiber, tapers can be used to reduce the NA (more toward collimated), or increase the NA (more toward Lambertian). The evanescence wave effect in a taper with the cladding partially or entirely removed can be used as a fluorosensor component.1 Sculpted tips can also be combined with a spherical surface such as mentioned previously. These end configurations are precision micro-formed on an optical fiber end using a laser. Some typical shapes are shown below. From the drawings, the optical fiber tip-end shape and characteristic are listed in the table. Keep in mind that the typical optical fiber diameter in these devices is typically in the range of 100mm to 2 mm. The shapes are made from the fiber itself, thus there are no coupling losses or interface contamination that might exist if the shape was bonded by fusion splicing onto the fiber end. Many other shapes that combine prism surfaces, spherical lensing surfaces, and flat facets have been produced.
The components can also be cut to specific lengths and used as micro-optical components. They can be coupled to existing optical fibers or used as individual optical elements. Several of the configurations shown are used for laser beam manipulation to re-shape the beam pattern. 1 N. Nath, et al., "Evanescent Wave Fiber Optic Fluorosensor: Effect of Tapering Configuration on Signal Acquisition"
The information given herein, including
drawings, illustrations and schematics (that are intended for
illustration purposes only), is believed to be reliable.
However, Polymicro Technologies makes no warranties as to its accuracy
or completeness and disclaims any liability in connection with its
use. Polymicro Technologies only obligation shall be as set
forth in Polymicro Technologies' standard terms and conditions of sale
for this product and in no way will Polymicro Technologies be liable
of any incidental, indirect or consequential damages arising out of
the sale, resale, use or misuse of the product. Users of
Polymicro Technologies' products should make their own evaluation to
determine the suitability of each such product for the specific
application.
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