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| Content Provider | Springer Nature Link |
|---|---|
| Author | Kravtsov, Yu. A. Berczynski, P. |
| Copyright Year | 2007 |
| Abstract | The paper outlines the most important results of the paraxial complex geometrical optics (CGO) in respect to Gaussian beams diffraction in the smooth inhomogeneous media and discusses interrelations between CGO and other asymptotic methods, which reduce the problem of Gaussian beam diffraction to the solution of ordinary differential equations, namely: (i) Babich’s method, which deals with the abridged parabolic equation and describes diffraction of the Gaussian beams; (ii) complex form of the dynamic ray tracing method, which generalizes paraxial ray approximation on Gaussian beams and (iii) paraxial WKB approximation by Pereverzev, which gives the results, quite close to those of Babich’s method. For Gaussian beams all the methods under consideration lead to the similar ordinary differential equations, which are complex-valued nonlinear Riccati equation and related system of complex-valued linear equations of paraxial ray approximation. It is pointed out that Babich’s method provides diffraction substantiation both for the paraxial CGO and for complex-valued dynamic ray tracing method. It is emphasized also that the latter two methods are conceptually equivalent to each other, operate with the equivalent equations and in fact are twins, though they differ by names.The paper illustrates abilities of the paraxial CGO method by two available analytical solutions: Gaussian beam diffraction in the homogeneous and in the lens-like media, and by the numerical example: Gaussian beam reflection from a plane-layered medium. |
| Starting Page | 1 |
| Ending Page | 36 |
| Page Count | 36 |
| File Format | |
| ISSN | 00393169 |
| Journal | Studia Geophysica et Geodaetica |
| Volume Number | 51 |
| Issue Number | 1 |
| e-ISSN | 15731626 |
| Language | English |
| Publisher | Kluwer Academic Publishers-Consultants Bureau |
| Publisher Date | 2007-01-01 |
| Publisher Place | New York |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Gaussian beams Gaussian beam propagation and diffraction complex geometrical optics dynamic ray tracing method Geophysics/Geodesy Structural Geology Meteorology/Climatology |
| Content Type | Text |
| Resource Type | Article |
| Subject | Geochemistry and Petrology Geophysics |
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