Lensed optical fiber
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United States of America Patent
Stats
-
Jun 8, 2004
Grant Date -
Oct 31, 2002
app pub date -
Jul 24, 2001
filing date -
Apr 30, 2001
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A microlens on the end of an optical fiber has reduced back reflections to a light source, such as a pump laser diode. In a particular embodiment, the microlens is lapped on two radii, at least one of which is offset from the center axis of the fiber, to form a point on the end of the fiber, thus reducing a surface for reflecting light back to the light source. In another embodiment, the microlens is formed with two different side surface angles to accommodate misalignment of the light source to the fiber mount. In another embodiment a Fresnel lens structure on the end of the fiber operates optically as an angled chisel lens.
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