DISPERSION COMPENSATOR

摘要

PROBLEM TO BE SOLVED: To embody constitution which allows relatively easy designing and is relatively easy in the regulation of a compensation quantity. SOLUTION: The dispersion compensator is constituted by linearly arraying three pieces of resonator filters 10a, 10b and 10c at prescribed intervals. These resonator filters 10a to 10c are laminated in this order on a glass substrate 18. The respective resonator filters 10a to 10c are coupled to each other in the state that Ta2O5 layers 24 are respectively interposed therebetween. The resonator filters 10a to 10c respectively have spacer layers 12 having first surfaces 12a and second surfaces 12b facing each other in parallel, first multilayered dielectric films 14 coupled to the first surfaces 12a and second multilayered dielectric films 16 coupled to the second surfaces 12b. The first multilayered dielectric films 14 and the second multilayered dielectric films 16 are formed by alternately laminating layers 20 of high-refractive index material and layers 22 of low-refractive index materials along an array direction.