ARRANGEMENT OF OPTICAL-INTEGRATED SPECTROMETER AND METHOD FOR MAKING THE SAME

摘要

2. It has been necessary to date to use gratings with chirp in arrangements for an integrated optical spectrometer with an optical film waveguide and a focusing optical grating. The aim is to specify a new arrangement in which the grating is used with a fixed groove separation and problems in adjustment and contrast can therefore be avoided. …2.2. In the new arrangement, the focusing optical grating (110, 120) is constructed on a boundary surface (11, 12), which is on the longitudinal side and defines a stage, of a ribbed waveguide (10) which is abutted by the film waveguide (20) at least on a longitudinal side of the ribbed waveguide (10). When using a grating (110, 120) with fixed groove separation (a), the ribbed waveguide is curved in accordance with a logarithmic spiral. Otherwise, it is necessary to tune a chirp of a grating and the form of the curve of the ribbed waveguide to one another. A method is specified for making the new arrangement. …2.3. Integrated optical demultiplexer ……