Integrated type online electro-optic modulator with graphene thin film and D-type optical fiber

Abstract

The invention belongs to the technical field of optical communication and sensing transmission of optical communication, and provides an integrated type online electro-optic modulator with a graphene thin film and a D-type optical fiber to overcome the disadvantages that the traditional electro-optic modulator is large in volume, high in energy consumption, narrow in modulation bandwidth, high in insertion loss, easy in interruption and the like. The electro-optic modulator comprises a silicon dioxide substrate, the D-type optical fiber arranged inside a groove of the silicon dioxide substrate, the graphene thin film coated on a polished surface of the D type optical fiber, and two metal electrodes oppositely arranged at the two sides of the graphene thin film, wherein one of the two metal electrodes is attached to the edge of the graphene thin film, the other one of the two metal electrodes is connected with the silicon dioxide substrate, and packaging adhesive used for packaging is arranged on a surface formed by the silicon dioxide substrate and the D-type optical fiber. The integrated type online electro-optic modulator with the graphene thin film and the D-type optical fiber, disclosed by the invention, has the advantages of small size, low power consumption and low cost, signal light is not subjected to the requirement of skewed normal distribution, few system error is produced, and the optical insertion loss is low; in addition, no crystal refraction effect is exerted and the pulse quality is excellent. The graphene has the advantages of sensitive electro-optic response and high modulation speed.

Description

technical field [0001] The invention belongs to the technical field of optical communication and sensing transmission thereof, and provides a graphene film D-type optical fiber integrated online electro-optical modulator. Background technique [0002] As the main form of modern communication, optical fiber communication has the characteristics of wide frequency band, low loss, large capacity and high reliability. With the rapid development of high-speed transmission systems, people's requirements for bandwidth are also increasing. As an important part of optical communication, optical modulation has attracted more and more attention. The role of optical modulation technology is to load bit signals onto light waves, that is, to generate modulated light pulses through continuous switching. According to the working principle of the modulator, the optical modulator can be divided into electro-optic modulator, acousto-optic modulator, magneto-optic modulator and electro-absorpt...

AI Technical Summary

Problems solved by technology

[0008] In order to overcome the shortcomings of traditional electro-optic modulators such as large volume, high energy consumption, narrow modulation bandwidth, large insertion loss, and susceptibility to interference, a graphene film D-type fiber-integrated online electro-optic modulator is provided, which is small in size and biased. The setting voltage is about -5V, the modulation efficiency is >90%, the wavelength range is about 1000nm-1700nm, and the modulation speed can reach above 50GHz

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