| 摘要 |
PROBLEM TO BE SOLVED: To provide a compact wavelength selector switch suitable for mass production. SOLUTION: The wavelength selector switch 20 is composed of a light incident and emitting part 26 composed of an optical fiber array 23 and a microlens array 25, and a filter mirror block 34. Multiple wavelength light (λ1,λ2) is made incident on an optical fiber 21a, and is made to pass through a microlens 24a, a reflection prevention film 33, a spacer 32a and a transparent substrate 27 in the described order. The light reflected on a mirror layer 29 is made incident on a filter 31b on the surface of a transparent film 44. The light having a specific wavelength and passing through a filter 31b is taken out of an optical fiber 31b. The light reflected on the filter 31b is also reflected on the mirror layer 29 and taken out of an optical fiber 21c. A filter band 30 is composed by linearly arranging a plurality of filters 31a and 31b which have different passing wavelengths and the wavelength of the light taken out of the optical fiber 21b is switched by a movable stage 39 in the longitudinal direction of filters. COPYRIGHT: (C)2004,JPO&NCIPI |
