The frequency-shift averaging(FSAV)technique is currently the most important method to reduce coherent Rayleigh noise (CRN).However,its noise reduction effect will be affected by frequency drift and pulse chirp effect,and it is not suitable for high spa-tial resolution systems.Targeting at the above problems,a new method is proposed to reduce CRN by using phase shift keying(PSK) pulse coding.The principle of the method is analyzed in detail,and the effectiveness and applicability of the method are verified by sim-ulation.The results show that the method can not only effectively reduce the CRN,but also be fully applicable in high spatial resolution.The method proposed provides a new perspective and practical method for the reduction of CRN in high spatial resolution optical fiber sensing systems based on Rayleigh scattering.
维普
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