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searching for Paraxial approximation 6 found (39 total)

Gaussian beam (6,964 words) [view diff] exact match in snippet view article find links to article

§ Complex conjugate ambiguity. Since this solution relies on the paraxial approximation, it is not accurate for very strongly diverging beams. The above

Héctor Manuel Moya Cessa (752 words) [view diff] exact match in snippet view article find links to article

He has also shown that a GRIN medium, when studied beyond the paraxial approximation, generates an analogy with a quantum Kerr medium. By being able

Time-domain holography (1,243 words) [view diff] exact match in snippet view article find links to article

monochrome, therefore it only has harmonic time variations (and the paraxial approximation) is considered as well. By solving the problem with the mentioned

Wigner quasiprobability distribution (5,299 words) [view diff] no match in snippet view article find links to article

p/ħ is replaced with k = |k| sin θ ≈ |k|θ in the small-angle (paraxial) approximation. In this context, the Wigner function is the closest one can get

Second-harmonic generation (6,845 words) [view diff] exact match in snippet view article find links to article

realistic condition in practice, especially in biological samples. The paraxial approximation is however supposed still valid: k n = n k 1 {\displaystyle k_{n}=nk_{1}}

Lugiato–Lefever equation (3,703 words) [view diff] exact match in snippet view article find links to article

{\displaystyle \nabla _{\perp }^{2}} describes diffraction in the paraxial approximation. Conditions of self-focusing are assumed. We refer to Eq.(1) as