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It was learned from Nanjing University of Aeronautics and Astronautics that the first ultra-high precision light vector analyzer developed by the school was introduced.
Ultra-high-precision optical vector analyzers are like "eyes of the eye", which are needed in the field of optical devices for a wide range of applications, from home fiber-optic routers to spacecraft. It accurately measures the two most critical metrics of an optical device, amplitude response and phase response, to capture its performance in development and application. The first generation of instruments can only measure the amplitude response. The second generation instrument can measure the amplitude response and phase response at the same time. However, there is only one OVA5000 product of NASA listed company LUNA in the world, and its high precision version is not sold to China. .
In 2010, Professor Pan Shilong of Nanjing University of Aeronautics and Astronautics began to build a microwave photonics laboratory. He led the team to find out in the research that the foreign light vector analyzer adopts the method of “measuring by lightâ€, which is time-consuming and laborious and the precision is not high. The self-developed light vector analyzer adopts the method of “electrical metering†to light signals. Convert to microwave signal. The research team has mastered the optical frequency comb channel technology, balanced photoelectric detection technology and new electro-optic modulation technology, which basically overcome the related technical difficulties. The second prototype of the optical vector analyzer has been tested by more than ten units including the Institute of Semiconductors of the Chinese Academy of Sciences and Jiangsu Guangyang Optoelectronics. It also helped a naval unit to realize automated measurement of the fiber optic interferometer, improving measurement accuracy by 10 times and saving costs by half. the above.
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