published:2020-03-11
intane optics has since 2007 worked with harbin institute of technology's key national defense experiment in space optical communications to develop a space laser communication terminal. the first-generation 600mm-aperture earth terminal for laser communication and the special detection equipment for optical system delivered met the intended indexes, and successfully passed the first satellite-to-earth high-speed laser communication experiment on november 24, 2011. the products met the customer-defined individual indicators and achieved historic breakthroughs in terms of system wavefront accuracy, multi-channel optical axis parallelism, control tracking accuracy, equipment stability, etc. according to the expert committee "china's first satellite-to-earth laser communication experiment is successfully conducted, and all the assignments of experimental research are successfully fulfilled."
the hy-2 satellite-to-earth laser communication marks the first successful satellite-to-earth laser communication link data transmission test in china. at 6 a.m. on october 25, 2011, the satellite-to-earth laser link acquisition and tracking test was passed, representing the first high-precision, high-stability and two-way rapid acquisition and full-link stable tracking in china. in the experiment, the satellites in high-speed movement at a rate of more than 20,000 kilometers per hour and the optical communication ground station were involved in a two-way dynamic beam lock tracking within the distance of nearly 2,000 kilometers with a precision that was much higher than the relevance between "needle tip and wheatgrass"; the satellite-to-earth high-speed data transmission test was passed, when the single-channel data rate reached 504mbps. the first-generation low-orbit satellite laser communication earth terminal won the grand prize for national defense technology invention 2013 and the first prize for national technology invention 2014.
