Light quantum coincidence counting positioning method based on time delay relative error
A technology of relative error and positioning method, which is applied in the measurement distance, line-of-sight measurement, climate sustainability, etc., and can solve the problems of large positioning error, positioning error, and positioning performance degradation.
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[0054] specific implementation
[0055] Below in conjunction with accompanying drawing, the present invention is described in further detail:
[0056] Step 1, using a laser to generate pump light with a wavelength of 405 nm, and using a half-wave plate and a polarization beam splitter to obtain linearly polarized light with a horizontal polarization direction;
[0057] Step 2: Modulate the linearly polarized light to 45° linearly polarized light through a half-wave plate to ensure the entanglement degree of the entangled light, and focus it to the PPKTP crystal through a lens to ensure the brightness of the entangled light;
[0058] Step 3: irradiating 45° linearly polarized light to the PPKTP crystal to generate a spontaneous parametric down-conversion process, and the light beam undergoes spontaneous parametric down-conversion with a certain probability to obtain entangled light;
[0059] Step 4: Using a polarization beam splitter to separate the entangled light with a wave...
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