Full-optical-fiber electro-optical modulation system

Abstract

The invention relates to a full-optical-fiber electro-optical modulation system. The full-optical-fiber electro-optical modulation system comprises an ionic liquid, platinum electrodes, wires, a DC stabilized power supply, a double tapered optical fiber and a U-shaped groove, wherein the platinum electrodes are vertically placed at the two sides of the inner wall of the U-shaped groove and are connected with the DC stabilized power supply through the wires; a double tapered optical fiber tapered area is partially placed between the two platinum electrodes in the U-shaped groove; and the U-shaped groove internally contains the ionic liquid. The distributing states of negative ions and positive ions in the ionic liquid can have a certain change along with the strength and direction of an external electric field, thereby changing the transmission characteristic of the ionic liquid; and the spectrum shape of an evanescent wave transmitted on the surface of the tapered optical fiber can change under the effect of the environmental factor, so that the spectrum shape of an optical signal transmitted by the tapered optical fiber changes. According to the full-optical-fiber electro-opticalmodulation system, the external electric field is controlled by changing the strength and direction of voltage applied to the platinum electrodes in the system, and the modulation characteristic of optical switch, electro-optical modulation and the like can be obtained.

Description

technical field [0001] The invention relates to the fields of optical fiber communication and optical fiber sensing, in particular to an all-fiber electro-optic modulation system. Background technique [0002] In high-speed long-distance communication, external modulation is the most important modulation method. Commonly used external modulators include: electro-optic crystal modulators, polarized polymer optical modulators, and semiconductor optical modulators. The main principle of the modulator is the direct electro-optic effect. Organic polymer electro-optic materials have many advantages, such as: low relative permittivity, easier to achieve high-frequency characteristics; wide variety of choices; high electro-optic coefficient. These advantages make polymer electro-optic materials the best choice for electro-optic modulators, but due to their poor stability and high loss, they have not been widely used yet. Polarized polymer light modulators are called next-generatio...

AI Technical Summary

Problems solved by technology

In this process, due to the transmission across the medium, there is a relatively serious insertion loss

At the same time, since lithium niobate is solid at room temperature, further processing is required in application environments that require specific shapes, which increases the cost of equipment

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