Optical device for mixing and distributing light.

摘要

The present invention is an optical device including an optical circuit in which a plurality of branched optical waveguides are connected to the light receiving side and the light ejecting side of a main optical waveguide which mixes the entering light. At least one of the branched optical waveguides has a taper construction which is wider at the joint portion to the optical fiber end than at the joint portion to the main optical waveguide, in order to improve loss variance and to reduce loss of light signals. It is desirable that the optical circuit have the following characteristics: $$ X:\; Width\; of\; the\; branched\; optical\; waveguide\; at\; the\; joint\; portion\; to\; the\; main\; optical\; waveguide.\; Y:\; Width\; of\; the\; branched\; optical\; waveguide\; at\; the\; joint\; portion\; to\; the\; optical\; fiber.\; W:\; Longitudinal\; length\; of\; the\; main\; optical\; waveguide\; (mm).\; Z:\; Cross\; directional\; length\; of\; the\; main\; optical\; waveguide\; (mm).\; It\; would\; be\; even\; more\; desirable\; that\; the\; optical\; circuit\; have\; the\; following\; characteristics:$ $ The\; present\; invention\; also\; provides\; a\; method\; for\; manufacturing\; the\; above-described\; optical\; device\; to\; be\; used\; in\; optical\; local\; networks\; and\; optical\; instrumentation\; control\; systems.\mathop{\mathrm{image}}$$$$