Patent ID: 7336868

Claim:
An optical component comprising at least one input monomode fiber ( 1 - 4 ), at least one output monomode fiber ( 5 ), a diffractive element ( 7 ) positioned between the input fiber or fibers ( 1 - 4 ) and the output fiber or fibers ( 5 ), and a focusing element ( 6 ) placed, between the ends of the fibers ( 1 - 5 ) and the diffractive element ( 7 ), characterized in that at least one of the input or output fibers ( 1 - 5 ) comprises a graded-index portion ( 21 - 25 ) designed to increase the radius of the mode field it guides for an enhancement of the FWHM/Δλ ratio and that the focusing element ( 6 ) is separated from the fibers.