PURPOSE: To provide the active type waveguide exhibiting a nonlinear optical effect and functional characteristics, such as oscillation and amplification of a laser, by introducing an optical waveguide layer consisting of an optically functional high-polymer material to a part of a core.
CONSTITUTION: The optical nonlinear high-polymer material is applied on a lower layer clad 1 and is dried to form a core lower layer part (optically functional part) 2. A core upper layer part 3 having the refractive index lower than the refractive index of the core lower layer part 2 and the thickness larger than the thickness thereof is formed on the core lower layer part 2. The two- layered core parts consisting of the upper and lower core layer parts 2, 3 are continuously worked by photolithography and dry etching, by which a ridge type optical waveguide structure is formed. Further, a high-polymer clad material having the same refractive index as the refractive index of the lower layer clad 1 is applied on the flanks and upper surface of the ridge type optical waveguide to form a clad part 4. Namely, the core lower layer part 2 bears the optical functionality and the core upper layer part 3 serves as an optical passive layer bearing light transmittability and workability. Both characteristics are thus compatibly obtd.
TOMARU AKIRA
OZAWAGUCHI HARUKI
HIKITA MAKOTO
SHUDO YOSHITO
HAYASHIDA SHOICHI
AMANO MICHIYUKI
USUI MITSUO
