摘要:
An optical switch having reduced processing errors in a coupling region, according to the claimed invention includes an input portion having a pair of optical waveguides; an output portion having a pair of optical waveguides; a light phase shifting portion for inducing an additional phase change on light travelling in the input portion; a first light coupling waveguide for coupling between two light signals of the input portion and for providing a coupled signal with the light phase shifting portion; and a second light coupling waveguide for coupled between two light signals of the light phase shifting means and for providing a coupled signal with the output portion. The light coupling unit includes a waveguide. The switch reduces considerably any error that stems from manufacturing variations between waveguides in a coupling region since the waveguides share the error produced in a coupling region. The length of the switching element can be reduced since the coupled between waveguides is not indirect as in DC switches and BB switches. Due to the reduction in length, the output loss is reduced considerable.
摘要:
A method of fabricating a thermooptic tunable wavelength filter of optical communication systems using WDM is provided, which includes the steps of forming a polymer optical waveguide on a semiconductor substrate using a polymer material, forming a polymer Bragg grating on the optical waveguide using O2 RIE and polymer spin coating, and forming a thermooptic tuning electrode over the polymer optical waveguide in which the Bragg grating is integrated. This provides the thermooptical tunable wavelength filter which has very narrow wavelength band width of transmission signal, low crosstalk with optical signals adjacent thereto, stable wavelength tuning characteristic using thermooptic effect and wide tuning ranges. Furthermore, the optical devices using the polymer optical waveguide can be fabricated with low cost. Thus, they have advantages in terms of economy and marketability.
摘要:
Disclosed is a fluorine compound having perfluorostyrene introduced at a terminal thereof, as represented in the following Formula 1, and a coating solution and an optical waveguide device using the same, characterized in that the introduction of perfluorostyrene results in a facile fabrication of thin films by a UV curing or a thermal curing, high thermal stability and chemical resistance, and low optical propagation loss and birefringence: Wherein Z is O or S; RF is an aliphatic or aromatic group; y is a natural number of 1–10; y′ is an integer of 0–1; x is an integer of 0–200; and Wherein B is a single bond or selected from the group consisting of —CO—, —SO2—, —S— and —O—, and Hal is selected from the group consisting of F, Cl, Br and I.
摘要:
An electro-optic polymer waveguide device capable of decreasing a driving voltage and an optical loss is disclosed. A vertical tapered waveguide is formed between passive waveguides of input and output portions in a waveguide and an electro-optic modulating region, and an amplitude of a waveguide mode of the input and output portion waveguide is equal to that of a optical fiber, thereby minimizing a connection loss with the optical fiber.