日本神奈川科学技术研究院利用自行开发的ARROW型光波导开发出世界上最小的1×8波长滤波器。将比以往小两个量级的直径19μm的微小环形共振器装在盒子里。具体地将ARROW型微小环形共振器靠近呈网状布设在玻璃基板上的布线用ARROW型波导交叉点处,层积连接。其特点是为便于层积,微小环形谐振器的直径可以缩小,且光纤的连接效率也高,首次确认 Japan’s Kanagawa Institute of Science and Technology developed by its own ARROW-type optical waveguide to develop the world’s smallest 1 × 8 wavelength filter. A small ring resonator of 19 μm in diameter, two orders of magnitude smaller than in the past, is housed in a box. Specifically, an ARROW type micro-ring resonator is placed close to the intersection of ARROW type waveguides for wiring laid out on the glass substrate in the form of a mesh and laminated. Its characteristic is to facilitate the stratification, the diameter of the miniature ring resonator can be reduced, and the fiber connection efficiency is also high, for the first time confirmed