Patent ID: 6856740
Filing Date: 2005-02-15
Classification: G02B,H04B

Abstract:
1. An optical fiber having an elevated threshold for stimulated Brillouin 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 is comprised of an acoustically dampening material that is acoustically matched to said cladding.