Patent ID: 6289157
Filing Date: 2001-09-11
Classification: G02B

Abstract:
An optical wave-guide having a z axis as an optical axis in a direction of propagation of light, an x axis in a vertical direction on a cross-section being perpendicular thereto, and a y axis in a horizontal direction, comprising:a core portion being formed so that a light is transmitted in the direction of the z axis, around at a center of an origin of said x axis and said y axis; anda crud layer surrounding said core portion and being lower in refractive index than that of said core portion, and being constructed with at least two layers, being different in refractive indexes thereof, which are in contact with each other on a border laying on a x coordinate in a positive or a negative region thereof but not the origin, whereinsaid core portion is formed discontinuously in the direction of said optical axis.