Optics: measuring and testing – Range or remote distance finding – With photodetection
Patent
1986-07-09
1988-09-06
Sikes, William L.
Optics: measuring and testing
Range or remote distance finding
With photodetection
350 9629, 350 9630, 350320, 350371, 356345, 356351, G02B 626, G01B 902
Patent
active
047688513
ABSTRACT:
A modal coupler, for coupling between first and second order modes of an optical fiber, comprises a single continuous strand of optical fiber, and a device for applying stress to the optical fiber at spaced intervals along the fiber. The stress deforms the fiber and abruptly changes the fiber geometry at the beginning and end of each stressed region. The change in fiber geometry causes coupling of light from the fundamental mode to the second order mode. The coupler, under certain conditions, exhibits polarization dependence, and thus, it may be utilized as a fiber optic polarizer. In addition, the device couples coherently, and may be used in interferometric systems.
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Brooks Janet L.
Shaw Herbert J.
Youngquist Robert C.
Healy Brian M.
Sikes William L.
The Board of Trustees of the Leland Stanford Junior University
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