Patent ID: 6360038
Filing Date: 2002-03-19
Classification: G02B

Abstract:
An optical device comprising:an input fiber having a cladding and a core for receiving a light input; a target fiber having a cladding and a core for providing light including some of the received light; the cladding of the input fiber and the cladding of the target fiber being close together to fiber a coupling region in which light is coupled from the cladding of the input fiber to the cladding of the target fiber; a first perturbation for wavelength-selective coupling of light from the core of the input fiber into the cladding of the input fiber; and a second perturbation for wavelength-selective coupling of light from the cladding of the target fiber into the core of the target fiber; wherein the coupling region is between the first perturbation and the second perturbation in a lengthwise direction.