Achromatic overclad fiber optic coupler

Details Achromatic overclad fiber optic coupler Achromatic overclad fiber optic coupler

G - Physics

02

B

G02B 6/26 (2006.01) C03B 37/15 (2006.01) G02B 6/28 (2006.01)

Patent

CA 2094765

Abstract of the Disclosure An achromatic fiber optic coupler of the type wherein a plurality of single-mode optical fibers, each having a core and a cladding, are fused together along a portion of the lengths thereof to form a coupling region. The propagation constants of the fibers are preferably equal; however if the fiber claddings have different refractive indices, the lowest cladding refractive index is n2. A matrix glass body of refractive index n3 surrounds the coupling region, n3 being lower than n2 by such an amount that the value of .DELTA.2-3 is less than 0.125%, wherein .DELTA.2-3 equals (n22-n32)/2n22.

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