Patent ID: 6687440
Filing Date: 2004-02-03
Classification: G02B,H04B

Abstract:
An optical fiber having an elevated threshold for stimulated Brillonin scattering comprising:a longitudinally extending core having a first index of refraction and a first acoustic wave propagation velocity; a cladding surrounding said core and extending lengthwise therealong, said cladding having a second index of refraction that is less than the first index of refraction of said core, said cladding also having a second acoustic wave propagation velocity that is less than the first acoustic wave propagation velocity in order to guide optical waves through said core while antiguiding acoustic waves; and an irregular coating disposed on said cladding that varies in a lengthwise direction in order to alter a mode profile of the acoustic waves, wherein said irregular coating has a lateral thickness that varies randomly in a lengthwise direction.