Structural properties of a TM polarized Gaussian beam in the far-field |
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Authors: | Zhou G Q |
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Institution: | 1.School of Sciences, Zhejiang A & F
University, Lin’an, 311300, Zhejiang Province, P.R.
China ; |
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Abstract: | In the far-field, the TM polarized Gaussian beam is just a sum of two orthogonal terms:
the TE and the TM terms. The analytical expressions for the ratios of the powers of the TE
and the TM terms to that of the TM polarized Gaussian beam are obtained without any
approximation. The contributions of the powers of the TE and TM terms to the power of the
TM polarized Gaussian beam only depend on the f-parameter. The analytical
divergence angles of the TE term, the TM term, and the TM polarized Gaussian beam are
derived. The formulae of the kurtosis parameters of the TE term, the TM term, and the TM
polarized Gaussian beam are also presented. The divergence angles and the kurtosis
parameters are only determined by the f-parameter. Relations among the
divergence angles and the kurtosis parameters of the TE term, the TM term, and the TM
polarized Gaussian beam are presented, respectively. The influence of the
f-parameter on the ratios of the powers of the TE and the TM terms to
the power of the TM polarized Gaussian beam, the far-field divergence angles, and the
kurtosis parameters are numerically analyzed. |
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Keywords: | |
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