Waveguide retroreflector and method of fabricating the same

Details Waveguide retroreflector and method of fabricating the same Waveguide retroreflector and method of fabricating the same

2008-01-16

2010-06-29

Harvey, Minsun (Department: 2828)

Coherent light generators

Particular resonant cavity

Specified cavity component

C372S092000, C385S031000, C264S001240, C427S163400

Reexamination Certificate

active

07746914

ABSTRACT:
A waveguide retroreflector consists of an end cap with curved output surface attached to a waveguide such as optical fiber. The radius of curvature of the output surface of the end cap matches the length of the end cap so as to retro-reflect a substantial portion of radiation exiting the waveguide, back into the waveguide. A method of fabricating the waveguide retroreflector includes steps of splicing an end cap to a waveguide, heating the free flat surface of the end cap, so that surface tension changes the shape of the end cap to a convex shape due to surface tension, monitoring amount of light reflected off the surface being heated, and stopping applying the heat when the amount of the reflected light approaches a maximum value.

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Wang et al., “Retroreflective Properties of a Hemispherical Surface”, Aug. 1, 1993, Applied Optics, vol. 32, No. 22, 4279-4281.

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