Internally modulated terahertz source based on waveguide structure and its internal modulation method

Abstract

The invention discloses an internal modulation terahertz source based on a waveguide structure and an internal modulation method thereof. The internal modulation terahertz source comprises a pumping source, a laser beam combiner, a coupler and a waveguide structure, all of which are sequentially arranged, wherein the pumping source is composed of two independent fiber lasers; the waveguide structure is formed by tightly adhering an organic electro-optical material cladding, a lithium niobate core layer and a quartz substrate from top to bottom through optical cement, a control circuit is arranged in the organic electro-optical material cladding, and a wedge-shaped structure is arranged on the outer side of the organic electro-optical material cladding. The refractive index of the organic electro-optical material cladding is modulated through the control circuit, so that waveguide structure internal modulation terahertz output is obtained; therefore, the higher core layer internal energy conversion efficiency is achieved, and the generated terahertz energy can be efficiently coupled and outputted. According to the internal modulation terahertz source based on the waveguide structure and the internal modulation method thereof, integrated optical modulated terahertz radiation with high efficiency and a simple and compact structure can be achieved, and the invention is suitable for subsequent application and research on the fields of wireless communication, imaging, radar and the like.

Description

technical field

[0001] The present invention relates to the field of terahertz radiation sources, and more specifically relates to an internal modulation terahertz source based on a waveguide structure and an internal modulation method thereof. Background technique

[0002] The terahertz band refers to the electromagnetic spectrum range between microwave and infrared waves with a frequency of 0.1-10THz. It has the characteristics of large information carrying capacity (compared to microwave), high spatiotemporal coherence, and low photon energy. It presents a very broad application prospect in the fields of wireless communication, imaging, radar and national defense security. High-performance terahertz radiation sources and their effective modulation are the basis for many applications of terahertz technology, such as the modulation of terahertz waves in communication, radar and other signal processing and material control. At present, with the advancement of terahertz scie...

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