East China Normal University

Chongqing Institute of East China Normal University

Roi Optoelectronics Technology Co, Ltd.

Shanghai Langyan Optoelectronics Technology Co., Ltd.

Xi'an Institute of Space Radio Technology

Jinman Ge

Heping Zeng

Mengyun Hu

Xiaojun Li

Ming Yan

Xiaoyue Wang

Jijun Feng

Qinggui Tan

A laser velocimetry method and system are provided. In the method, an ultrashort pulse laser is subjected to temporal broadening, beam splitting and spectrum broadening in sequence to from a three-dimensional measurement space. When an object moves in the measurement space, a first signal light s_, a second signal light s_, a third signal light s_are generated, based on which velocity components v, v, and vof the target object can be obtained, respectively, so as to obtain the velocity of the object in accordance with a formula of v=v·i+v·j+v·k.

Ultra-high speed time-frequency fourier laser velocimetry method and system

A silicon nitride phased array chip based on a suspended waveguide structure, which includes a silicon nitride waveguide area and a suspended waveguide area. The silicon nitride waveguide area includes a silicon substrate, a silicon dioxide buffer layer, a silicon dioxide cladding layer and a silicon nitride waveguide-based core layer. The silicon nitride waveguide-based core layer includes an optical splitter unit, a first curved waveguide, a thermo-optic phase shifter and a spot-size converter. The suspended waveguide area includes a second curved waveguide and an array grating antenna.

Silicon nitride phased array chip based on a suspended waveguide structure

Growing community of inventors

Chongqing, China

Jinman Ge