DISPERSION COMPENSATION ELEMENT

摘要

A low-loss dispersion compensation element realizing a higher transmission rate of optical pulse. The dispersion compensation element for compensating wavelength dispersion of an externally incident optical pulse, comprises a waveguide consisting of a core section for guiding the optical pulse from the incoming end to the outgoing end, and a clad section formed of a first clad layer and a second clad layer, and a photonic crystal section for imparting a wavelength dispersion variation having predetermined dispersion characteristics including the absolute value of variation in wavelength dispersion and a sign of positive or minus to the optical pulse being guided by that waveguide, characterized in that the photonic crystal section is formed by being laminated on the first clad layer, the core section is formed by being laminated on the photonic crystal section, and the second clad layer is laminated partially on the photonic crystal section to cover the upper part and the side part of the core section.