All optical fiber type electro-optic modulator based on D-shaped double core optical fiber

Abstract

The invention discloses an all optical fiber type electro-optic modulator based on a D-shaped double core optical fiber, and belongs to the field of a special optical fiber, optical fiber communication and signal processing. A core (2) in the D-shaped double core optical fiber (1), which is positioned in the center, is connected with an input end single mode optical fiber, and a core (3) close to a boundary is connected with an output end single mode optical fiber. The surface of the D-shaped double core optical fiber (1) is coated with an electro-optical polymer (4), and both sides of the electro-optical polymer are plated with metal electrodes (5) and are connected with voltage loading devices (6). When voltages (6) are loaded, a refractive index of the electro-optical polymer (4) is changed along with the voltages, the core (3) close to the electro-optical polymer (4) is sensitive to change of the refractive index of the electro-optical polymer (4), and the core (2) positioned in the center is insensitive to the change of the refractive index of the electro-optical polymer (4). When the voltages (6) loaded to both the ends of the electro-optical polymer (4) are changed, a coupling degree of two cores is changed, so that strength modulation of light can be achieved.

Description

technical field [0001] The invention relates to an all-fiber electro-optic modulator based on a D-type double-core fiber, belonging to the fields of special optical fiber, optical fiber communication and signal processing. Background technique [0002] The rapid development of modern communication, electronics and computer technology is inseparable from the support of optical fiber communication network, and frequency conversion, modulation, switching and deflection in optoelectronic technology are indispensable technologies in the process of optical information processing. Therefore, high-speed electro-optic modulators have become irreplaceable and important devices in optical communication networks. Electro-optic modulation is due to the electro-optic effect of the medium (Pockels effect or Kerr effect, etc.), when an electric field is applied to the electro-optic medium region, its refractive index will change, which will cause changes in the phase and light intensity of ...

Images