Patent ID: 11962117
Assignee: CHINA SOUTH INDUSTRY ACADEMY
Field: Optics (Instruments)
Classification: CPC H  G | IPC G  H

Claim 7:
8. The fiber laser light coherent combination system according to claim 1, wherein the digital phase modulation and demodulation module is configured to filter out a frequency shift signal of the reference beam in the electrical signal according to the set frequency, multiply the resultant electrical signal by a pseudo-random sequence corresponding to each of the sub-beams, sum a multiplication result corresponding to each of the sub-beams within a period of the corresponding pseudo-random sequence, normalize a summation result corresponding to each of the sub-beams to obtain a cosine value of the phase difference between the corresponding sub-beam and the reference beam, and calculate an arc cosine of the cosine value of the phase difference between each of the sub-beams and the reference beam to obtain the phase difference between the corresponding sub-beam and the reference beam.