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In this paper,multipath temporal spreading distributions of laser pulses are calculated when they travel through the seawater. Individual photon is followed in Monte Carlo calculation. A modified Henyey-Greenstein (HG) function is applied to represent the scattering phase function of seawater. This paper proposes a new scaling method,which uses the effective scattering thickness τ d to replace the optical thickness used in the traditional scaling technique. This paper compares the temporal spreading distributions of photons on conditions of different attenuation coefficients and target depths. The experiments reveal that these mutual deviations are changing in the range from 0.5% to 5%,so long as the corresponding effective scattering thicknesses τ dremains the same. Therefore,a conclusion can be obtained,that the temporal spreading distribution is only dependent on the effective diffusion thickness τ d.
In this paper, multipath temporal spreading distributions of laser pulses are calculated when they travel through the sea. Individual modified monochromatic radiation distributions of laser pulses are calculated when they travel through the seawater. Individual photon is followed in Monte Carlo calculation. A modified Henyey-Greenstein (HG) function is applied to represent the scattering phase function of seawater. paper proposes a new scaling method, which uses the effective scattering thickness τ d to replace the optical thickness used in the traditional scaling technique. This paper compares the temporal spreading distributions of photons on conditions of different attenuation coefficients and target depths. these mutual deviations are changing in the range from 0.5% to 5%, so long as the corresponding effective scattering thicknesses τ dremains the same. Thus, a conclusion can be obtained, that the temporal spreading distribution is only dependent on the effective diffusion thickness τ d.