Bi-directional fiber optic transceivers, housings therefor, and methods for making and using the same
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United States of America Patent
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Nov 24, 2015
Grant Date -
Jan 3, 2013
app pub date -
Dec 30, 2011
filing date -
Jun 29, 2011
priority date (Note) -
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Abstract
A bi-directional fiber optic transceiver includes a laser diode, a photodiode, first and second lenses, all of which share a common linear optical axis, and a housing. The first lens may have transmission increasing film thereon. The second lens may have a reflection increasing film thereon. An optical splitter may be between the first and second lenses. The first and/or second lenses may be spherical, hemispherical or aspheric. The transceiver size is reduced so that a circuit board can accommodate more components or be smaller in size. Utilizing hemispherical lenses can greatly increase the coupling ratio of the optical links between the photodiode, fiber and laser diode. Utilizing aspheric lenses with high coupling can serve high power output requirements. Use of spherical lenses (which extend the focal length) with aspheric lenses enables LD TO assemblies in individual housings to serve in various products.
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