Fiber optic element for reducing speckle noise
AssigneeNorthern Telecom Limited
InventorRoman Maciejko
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Abstract
A fiber optic system element for reducing speckle and modal noise resulting from coupling a laser diode to an optical fiber has the form of a short length of fiber through which extend filaments of different refractive indices. Such fiber is fabricated by fusing together a plurality of fibers of different refractive index profiles and drawing the resulting preform into a single fiber.
Claims14
A fiber optic system element comprising a length of optical fiber having a plurality of filaments fused together, the filaments having refractive indices differing from one another to give a random refractive index profile distribution across the element, the element thereby characterized by a large number of possible optical path lengths for light propagating from one end of the element to a remote end thereof, each such path length depending upon the position of incidence of a light ray at said one end.
Dependencies are inferred from the claim text.