High-power dual-wavelength laser auto-collimation same-emergence-angle emitting device

Abstract

The invention discloses a high-power dual-wavelength laser auto-collimation same-emergence-angle emitting device comprising a wavelength beam splitter, a reflector, auto-collimation delay controllers,a wavelength beam combiner, a PSD displacement sensor, a photoelectric detector, and an achromatic telescope. The dual-wavelength laser is split by the wavelength beam splitter. The PSD displacementsensor samples each beam and drives a corresponding auto-collimation delay controller to control each optical path. The respective beams are combined into one beam after passing through the wavelengthbeam combiner, and the resulting beam is emitted out after passing through the achromatic telescope. The collimation beam expanding ratio of each auto-collimation delay controller matches the achromatic telescope, so that the laser beams having various wavelengths have the same emergence angle. The auto-collimation delay controllers and the achromatic telescope are all plated with a high-threshold antireflection or 45-degree high-reflection film to ensure high-power laser transmission. In addition, by increasing or decreasing the number of the auto-collimation delay controllers, the wavelength can be increased or decreased, thereby promoting the development of long-distance multi-wavelength laser ranging and laser communication.

Description

technical field [0001] The invention relates to the field of laser ranging and communication, in particular to a high-power dual-wavelength laser emitting device with the same self-collimation emission angle. Background technique [0002] Satellite laser ranging has the advantages of long range and high ranging accuracy, making it a conventional means of satellite orbit determination and monitoring, and has been valued by various countries. With the development of satellite laser ranging technology to higher precision, atmospheric correction has become the main source of error in determining the precise geometric distance from the station to the satellite. Although the Marini-Murray model used for atmospheric correction can achieve an accuracy of about 1cm, in order to obtain a higher millimeter-level atmospheric correction accuracy, the satellite laser ranging system needs to work in a dual-wavelength measurement mode, using the method of atmospheric dispersion difference ...

AI Technical Summary

Problems solved by technology

At present, high-power and high-energy laser emission mostly uses a transmission telescope composed of a concave lens and a convex lens as the transmission telescope. Since the materials in the transmission telescope have different refractive indices for each wavelength, the laser emission angles at different wavelengths are also different. Facilitate dual-wavelength or multi-wavelength laser emission

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