University of Electronic Science and Technology of China

Source Photonics (chengdu) Company Limited

Chengdu Newsun Cropscience Co., Ltd

Ke Liu

Bo Zhang

Yong Fan

Xiaobo Yang

Zhi Chen

Yi Hu

Jicong Zhang

Bingli Dai

Zhongqian Niu

Shulin Tian

Qiming He

Houjun Wang

Dan Wu

Dan Huang

Hao Yin

Yuzhu Li

Jianguo Huang

Shaojun Zhan

Xuanqi Zhang

Chuting Du

Huilin Li

Yingjun Tian

Huihui Wang

Yindong Xiao

Liangzhu Kang

Linfeng Hang

Guangkun Guo

Jin Huang

Junwu Zhang

Yanling Wang

Yongbu Hailai

The present disclosure provides a hetero-integrated terahertz low-noise miniaturized image frequency rejection transceiver front-end, including an intermediate frequency circuit and a terahertz circuit arranged up and down, where the terahertz circuit includes a local oscillator frequency tripler, a 135° 3 dB filter coupler, a radio frequency waveguide power divider, and two quartz hetero-integrated subharmonic mixers; resonant cavities of an input unit, a first output unit, an isolation unit, and a second output unit of the 135° 3 dB filter coupler are sequentially coupled through resonant grooves to form a ring structure, a cavity length of the resonant cavity of the input unit is twice that of the resonant cavities of the other three units, and an electrical length of a waveguide of the first output unit is 45° different from that of a waveguide of the second output unit.

Hetero-integrated terahertz low-noise miniaturized image frequency rejection transceiver front-end

The present disclosure provides a GaAs monolithic integrated terahertz low-noise communication system transceiver front-end, including an intermediate frequency circuit and a terahertz circuit. The terahertz circuit includes a local oscillator frequency tripler, a local oscillator unidirectional 3 dB filter coupler, a radio frequency 180° filter coupler, and two terahertz GaAs monolithic integrated subharmonic mixers. The local oscillator unidirectional 3 dB filter coupler and the radio frequency 180° filter coupler each include one ring-cylindrical resonant cavity and four rectangular waveguides. The ring-cylindrical resonant cavity is divided into four rectangular waveguides which are correspondingly connected to the four sector-annular resonant cavities, respectively. The present disclosure suppresses the local oscillator noise by adopting a local oscillator unidirectional 3 dB filter coupler and a radio frequency 180° filter coupler with both coupling and filtering functions, thereby achieving a low local oscillator noise transceiver front-end.

GaAs monolithic integrated terahertz low-noise communication system transceiver front-end

A pollen polysaccharide extract prepared by the following method: mixing rape pollen with water, then heating and stirring for extraction, filtering, mixing filtrates, adding chitosan to a resulting filtrate to obtain a liquid to be clarified, keeping the liquid to be clarified at 60-80&#xb0; C. for at least 1 h, cooling and allowing to stand, and performing solid-liquid separation to obtain a liquid, namely the pollen polysaccharide extract.

Pollen polysaccharide extract and application thereof in plant growth

An optical transceiver and a method of making the same. The optical transceiver includes a base/housing having a roughened or darkened optics mounting surface, a transmitter optical subassembly (TOSA), a receiver optical subassembly (ROSA), a beam splitter mount secured to or mounted on the roughened or darkened optics mounting surface, a beam splitter secured to or mounted on the beam splitter mount, and an optical fiber adapter. The TOSA includes a laser diode configured to convert a received electrical signal to an outgoing optical signal. The ROSA includes a photodiode configured to convert a received optical signal to an outgoing electrical signal. The beam splitter is transparent to one of the outgoing and received optical signals and is configured to reflect the other. The optical fiber adapter is configured to hold an optical fiber that receives the outgoing optical signal and provides the received optical signal.

Methods of reducing or eliminating internal optical light reflections, increasing yield, reducing high-temperature transmission failures and/or improving OSA transmission performance and an improved optical transceiver implementing the same

The present invention provides an arbitrary waveform generator based on instruction architecture. To deal with the feature that the instructions and waveform data of the AWG are coupled in the prior art, an instruction set based waveform synthesis controller is employed, and substitutes for the sequence wave generator in the present invention, i.e. an arbitrary waveform generator based on instruction architecture. Thus the time-sharing scheduling in reading the waveform synthesis instruction and the segment waveform data is realized, and the complexity of the hardware is reduced, so that the AWG in present invention can synthesize and generate a complex sequence wave rapidly and efficiently.

Arbitrary waveform generator based on instruction architecture

Growing community of inventors

Chengdu, China

Ke Liu