Patent ID: 6621968
Filing Date: 2003-09-16
Classification: G02B,G02F

Abstract:
An optical fiber device comprisinga single mode optical fiber for introducing incident light; an optical fiber which is connected to said single mode optical fiber and has a normalized frequency value, in which the dispersion of the beat length between a first and a second modes is a minimum in an optical signal wavelength band, by adjusting structural parameters of the optical fiber including a core radius, a core refractive index and a cladding refractive index, so that the beat length between said first and second modes does not depend on an optical wavelength in the operating wavelength band of the passing light; acoustic wave generating means for generating a flexural acoustic wave in said optical fiber with structural parameters adjusted; and output mode stripping/selecting means, connected to said optical fiber with structural parameters adjusted, for eliminating or selecting a particular mode of the light that passes therethrough.