Relay light-amplified laser ranging method and device for cooperative target

Abstract

The invention relates to a relay light-amplified laser ranging method and a relay light-amplified laser ranging device for a cooperative target, which are characterized in that: a ranging laser signal which is incident to the cooperative target is subjected to relay light amplification by using a light amplifier, and the amplified light signal is returned to a ranging station, wherein the cooperative target consists of an information processing and control center, a coarse sighting mechanism, an optical antenna, a spectroscope, an image sensor, a space light-to-light waveguide coupling module, an optical waveguide, the light amplifier, a return light beam sighting module, a light incidence / return combiner, a pyramid prism and a shutter. By the laser ranging method and the laser ranging device for the cooperative target, the defect of insufficiency in transmitted laser power during remote laser ranging can be overcome, the required laser power is quadratisch of distance instead of biquadrate of the distance, and the measuring distance can be increased obviously, so the laser ranging method and the laser ranging device are particularly suitable for the laser ranging of the remote cooperative target.

Description

technical field [0001] The invention belongs to the technical field of space measurement, specifically relates to cooperative target laser ranging, and is particularly suitable for long-distance satellite laser ranging or lunar laser ranging applications. Background technique [0002] Satellite laser ranging is a high-precision space measurement technology that appeared in the mid-1960s. Its principle is to accurately measure the round-trip time interval of the laser pulse from the ground observation station to the satellite equipped with reflectors, so as to calculate the distance from the ground observation station to the satellite. distance. After more than 40 years of development, the measurement accuracy of satellite laser ranging has been improved from the initial few meters to the current few centimeters or even millimeters. [0003] According to the laser ranging equation, the echo energy density is inversely proportional to the fourth power of the distance. In sat...

AI Technical Summary

Problems solved by technology

If other conditions remain the same, every time the measurement distance is doubled, the emitted laser power needs to be increased to 16 times, and increasing the emitted laser power also faces dangers such as human eye safety and target damage.

In addition, increasing the size of the retroreflector on the satellite, using a larger optical antenna, and using a more sensitive light detection method can also increase the measurement distance, but these technical improvements are also very difficult and costly

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