LIGHT WAVELENGTH MULTIPLEXER/DEMULTIPLEXER

摘要

A change in the chip size, the center wavelength, the wavelength interval or the number of channels of an array waveguide will change the waveguide length or the like of the array waveguide. Then, an array waveguide type wavelength multiplexer/demultiplexer circuit should be produced with the width, length, thickness and inclination angle of its inclined portion changed. Changes in the width, length, thickness and inclination angle of the inclined portion result in changes in production conditions such as etching of the array waveguide type wavelength multiplexer/demultiplexer circuit. A change in etching condition poses problems such as yield of the array waveguide type wavelength multiplexer/demultiplexer circuit and an increase in production man-hours. A wavelength multiplexer/demultiplexer comprising first slab waveguide-side tapered units and second slab waveguide-side tapered unit that are formed at equal intervals, and first slab waveguide-side inclination units and second slab waveguide-side inclination units that are formed between the first slab waveguide-side tapered units and second slab waveguide-side tapered unit.