D-type optical fiber M-Z electro-optical modulator for eliminating thermoelectric effect of lithium niobate and preparation method thereof

Abstract

The invention relates to a D-type optical fiber M-Z electro-optical modulator capable of eliminating the thermoelectric effect of lithium niobate. The modulator comprises an optical fiber waveguide area, a coupling area, a modulation area, a thermoelectric effect eliminating area, a slab waveguide area and a D-type optical fiber waveguide area. Herein, light is transmitted through the optical fiber waveguide area, gradually coupled into the coupling area waveguide and divided into two paths to generate phase difference after passing through the modulation area waveguide, intensity modulation is achieved through interference of the coupling area, and the light is gradually coupled into the optical fiber waveguide through the coupling area. The thermoelectric effect eliminating area wraps the Z face of the D-type optical fiber waveguide area and the Z face of the slab waveguide area to form a loop, so that the influences of thermal charges generated in the working process of the M-Z electro-optical modulator on an external electric field are eliminated, and heat dissipation of a device is facilitated; meanwhile, impedance matching can be achieved easily, the efficiency of the modulator is improved, and it is guaranteed that the device works stably.

Description

technical field [0001] The invention can be applied to the fields of optical fiber communication, optical interconnection, optical sensing technology, etc., and specifically relates to an M-Z type X-cut lithium niobate thin film modulator structure using graphene as a conductive film, which is a low loss, high High efficiency, high bandwidth, high stability new lithium niobate modulator. Background technique [0002] With the rapid development of 5G technology, the construction of high-speed optical communication network is imminent, and the demand for telecommunication services and bandwidth is increasing rapidly. By loading signals on optical waves, people have truly realized reliable and high-speed optical communication, which has promoted various aspects of work and life. development of. Electro-optic modulators are widely used in optical fiber communication, optical fiber sensing, microwave photonics, quantum communication and other technical fields. A key function of...

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Problems solved by technology

[0005] Aiming at the problem of poor stability of existing lithium niobate modulators, the present invention proposes a D-type optical fiber M-Z electro-optic modulator that eliminates the thermoelectric effect of lithium niobate. Integrated into the D-type optical fiber waveguide, using the superior conductivity of graphene to eliminate the influence of the internal thermal charge of lithium niobate on the stability of the modulator

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