Import beam and optical radiation force curve

[researcher-sea]

Thank you very much for taking time out of your busy schedule to review my message. I have been experiencing some difficulties while using the toolbox, and I was wondering if anyone could help me with these issues.
Question1:
When calculating the Beam Shape Coefficients (BSCs) for the external beam's near-field distribution using the ‘focalplane’ function and visualizing them in the toolbox, I observed discrepancies between the beam profile reconstructed with the beam propagation constants and the original imported beam (see Fig. 1). Is this a normal phenomenon? Could this be an expected numerical artifact, or might there be critical parameters I have overlooked?

Question 2:
When calculating the optical trapping force using the linearly polarized Gaussian beam (NA=0.9) described in Question 1, small spikes appeared in the optical radiation force curve (indicated by black circles in Fig. 2(a)). The curve exhibits a non-smooth profile. For comparison, I generated a Gaussian beam with the same numerical aperture using the ‘BscPmGauss’ function from the toolbox and calculated the optical radiation force under identical scattering conditions. The results shown in Fig. 2(b) exhibit no such spikes and are smooth. Are these small spikes in the optical radiation force curve expected or normal under these conditions? Could you advise on the potential causes of this discrepancy? Might there be additional factors I have overlooked?

Thanks
LongHui