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US 5,633,974 AGranted
All fiber attenuator
AssigneeThe Whitaker Corporation
InventorShin-Lo Chia
Life of this patent
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AssigneeThe Whitaker Corporation
InventorShin-Lo Chia
Estimating the term…
An optical attenuator uses a segment of attenuating fiber interposed in the optical path. The attenuating fiber is produced by using a solution doping technique to introduce transition or rare earth elements into the fiber's core. The dopant reduces the transmission of the fiber. The degree of attenuation depends upon the material used as the dopant, the dopant level, and the length of the attenuation segment. In a specific embodiment, an optical attenuator is provided having a first and second signal carrying optical fibers and an attenuating fiber segment, each of which has a core, a cladding substantially coaxial with the core, and a substantially planar endface. The attenuating fiber segment is fusion spliced between the first and second signal carrying optical fibers. In a second embodiment a portion of the cladding of the attenuating fiber is chemically etched.
An optical attenuator, comprising a first optical fiber and a second optical fiber;
An optical attenuator, comprising a first optical fiber fusion spliced to a first end of a solution doped attenuating optical fiber and a second optical fiber fusion spliced to a second end of a solution doped optical fiber, said solution doped optical fiber attenuating light in the wavelength range of 1250-1550 nm.
An optical attenuator, comprising a first optical fiber having a front surface, a solution doped attenuating optical fiber having a first end and a second end, said first end being attached to said first surface of said first optical fiber in said second end being attached to a front surface of a second optical fiber, said solution doped optical fiber having a selectively etched cladding.
An optical attenuator comprising a first optical fiber and a second optical fiber;
Dependencies are inferred from the claim text.