Abstract:
실리콘위상쉬프터는광도파로및 복수의불순물영역들을포함한다. 광도파로는광신호를수송한다. 복수의불순물영역들은광도파로와지그재그패턴의접합면들을각각가지도록형성되고, 전하캐리어들을각각포함한다. 따라서, 실리콘위상쉬프터는광도파로를통과하는광신호의위상을효율적으로제어할수 있다.
Abstract:
An optical integrated circuit includes a substrate including a single crystalline semiconductor material, a passive device including a single crystalline semiconductor material and extended onto the substrate in the crystal direction of the substrate, and an active device including a single crystalline semiconductor material and extended onto the substrate in the crystal direction of the substrate. [Reference numerals] (AA,HH) First direction; (BB,GG) Second direction; (CC,FF) Third direction; (DD,EE) Fourth direction
Abstract:
A voltage is applied between an interdigitated electrode provided on one major surface of a ferroelectric single crystal substrate in which domains are formed and a uniform electrode provided on the other major surface. Consequently, a periodic polarization inversion structure (9) is made, and the interdigitated electrode is removed. Then, an optical waveguide (20) is fabricated on the substrate (18). The center (P1) of the light intensity in the optical waveguide (20) is separated from the end position (PO) of the interdigitated electrode. ® KIPO & WIPO 2009
Abstract:
The present invention is directed to highly integrated lightwave circuits made from ultrahigh-index-contrast materials. Specifically the present invention is directed to optical switch arrays and means for their fabrication.
Abstract:
A waveguide filter device for optical telecommunications network is provided. The device comprises a substrate (1) containing a waveguide (2) disposed close to the surface of said substrate, an overcladding layer (3) overlaid on said substrate and a cover plate (4) overlaid on said overcladding layer. The waveguide has an input port for receiving an input light signal and an output port for outputting the filtered light signal. The overcladding layer and the cover plate lie within the evanescent coupling field of the waveguide. The average refractive index of said overcladding layer is greater than the waveguide core mode index, while the average refractive index of the cover plate is lower than the waveguide core mode index. In a preferred embodiment of the invention the overcladding layer is an Electrically Switchable Bragg Grating.