Laser measurement method and device based on double sideband modulation
A double-sided band and modulated light technology, which is applied in measuring devices, radio wave measuring systems, electromagnetic wave re-radiation, etc., can solve problems such as inability to achieve real-time measurement
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Embodiment 1
[0053] The basic structure of the laser measuring device in this embodiment is as follows: figure 2 As shown, including: microwave source, light source, power splitter, optical beam splitter, optical beam combiner, double sideband modulator, photodetector, electrical mixer, frequency measurement and data processing module, laser transmitting module and laser receiving module. The linear frequency modulation microwave signal sent by the microwave source is divided into two paths by the power divider, and input into the microwave input port of the double sideband modulator and the input port of the electric mixer respectively. The output of the light source is divided into two paths by the optical beam splitter, one path is used as the optical carrier input to the double-sideband modulator; the other path is used as the local oscillator light, which is combined with the laser echo received by the laser receiving module through the optical beam combiner, and then input to the ph...
Embodiment 2
[0068] The basic structure of the laser measuring device in this embodiment is as follows: image 3 As shown, it includes: microwave source, light source, optical beam splitter, optical beam combiner, double sideband modulator, photodetector, electrical mixer, frequency measurement and data processing module, laser transmitting module and laser receiving module. The linear frequency modulation microwave signal sent by the microwave source is input into the microwave input port of the double sideband modulator, and the light source outputs the optical carrier to the double sideband modulator. The carrier-suppressed double-sideband modulated optical signal output by the double-sideband modulator is divided into two paths by the optical beam splitter, one path is used as the probe light and transmitted to the object to be measured through the laser emitting module; the other path is used as the local oscillator signal through the optical beam combiner and the laser The laser echo...
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