LIGHT AMPLIFIER, SUPER-LUMINESCENT DIODE AND OPTICAL INTEGRATED CIRCUIT AND THEIR MANUFACTURE

摘要

PURPOSE:To obtain a low reflectance by mounting high refractive-index sections having a refractive index which is higher than or equal to the refractive index of a light amplifying section or clad sections on the outside of the light amplifying section on one side. CONSTITUTION:In the vicinity of the end faces of two resonators, high refractive-index sections 14a made of a substance having a refractive index which is higher than or equal to that of an light amplifying section 11a or another substance having a refractive index which is higher than or equal to that of clad sections 10a and 10b are provided. Since the waveguide structure is discontinued by the high refractive-index sections 14a mounted on the outside of the amplifying section 11a, the structure can be broken. Moreover, since the refractive index of the sections 14a is higher than that of the section 11a, guided rays of light are deviated toward the high refractive-index areas 14a and most of the rays of light reflected by the end faces of the section 11a are not coupled with the original optical waveguide. Therefore, a low reflectance can be obtained.