A Single Photon Counting Heterodyne Detection Method Based on Sequence Reconstruction
A technology of single photon counting and heterodyne detection, applied in radio wave measurement systems, instruments, etc., can solve the problem of weakening the signal amplitude strength, reduce the time of subsequent processing, increase the overall efficiency, and facilitate processing
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[0080] A method for single photon counting heterodyne detection based on sequence reconstruction provided by a preferred embodiment of the present invention comprises the following steps:
[0081] Step 1: Receive photons by photon counting detector, generate photon pulse sequence, and record the pulse sequence time interval, such as Figure 4 The distribution of the pulse train shown, Figure 6 The pulse sequence simulation diagram shown and Figure 8 The power spectral distribution of the pulse train is shown by Figure 8 It can be seen that it is relatively difficult to detect heterodyne frequency signals at present, and the photon pulse sequence is expressed as:
[0082]
[0083] Among them, K=N S +N LO , K is the total number of photons; δ(.) is the delta function; t k is the arrival time of the kth photon;
[0084] Step 2: Reconstruct the photon pulse sequence based on the time interval of the pulse sequence to obtain the reconstructed pulse sequence, such as F...
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