| 摘要 |
PURPOSE:To eliminate the need for inserting thin filters into narrow grooves and to extremely facilitate production operations by providing filters to reflect light of prescribed wavelengths or allow the transmission thereof to the cut parts of a substrate. CONSTITUTION:The substrate 1 formed with plural optical waveguides 2 is cut at the cut parts 21, 22. The filter which reflects the light of the wavelength lambda1 and allows the transmission of the light of the wavelengths lambda2, lambda3 is provided to the 1st waveguide 27 of the cut part 21. On the other hand, the filter which reflects the light of lambda2 and allows the transmission of the light of lambda3 is provided to the 3rd waveguide 29 of the cut part 23. The cut parts 21, 22 are recoupled and optical fiber arrays 31, 33 are fixed in tight contact to both sides. Plural optical waveguide type demultiplexers 35 are obtd. when the substrate is cut at chain lines 34. The light of wavelength lambda1 of the light of the wavelengths lambda1, lambda2, lambda3 from the optical fiber 30 is reflected by the cut part 21 and the light of the wavelength lambda2 is reflected by the cut part 22. The light of the wavelength lambda3 is emitted to the optical fiber 32. |
