40results about How to "High electro-optic coefficient" patented technology

The present invention belongs to the field of optoelectronic communication and optical information treatment. In the modulator, upper metal film, photoelectric polymer film, isolating layer and lower metal film are plated successively onto the lower surface of the prism; the upper and the lower metal film and the photoelectric polymer film constitute double-sided metal coated waveguide structure; the prism, the upper metal film and the photoelectric polymer film constitute the attenuating total-reflection structure; and the excited guide wave propagates inside the photoelectric polymer film. The modulation method includes constituting the said modulator, using semiconductor laser as laser light source, producing guide wave resonance mode, looking for corresponding sync angle to make theincident angle of laser beam to the bottom of the prism equal to the sync angle, and receiving reflected laser beam with detector to realize multiplex light modulation.

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.