Seshadri S R
Opt Lett. 2002 Jun 15;27(12):998-1000. doi: 10.1364/ol.27.000998.
The virtual source for generation of the fundamental scalar Bessel-Gauss wave is identified. An expression is derived for the Bessel-Gauss wave, which, in the appropriate limit, yields the paraxial approximation for the fundamental Bessel-Gauss beam. For the azimuthally symmetric beam, the first-order nonparaxial correction to the on-axis field is also determined. This nonparaxial correction reduces correctly to that of the fundamental Gaussian beam in the appropriate limit.
确定了用于产生基本标量贝塞尔 - 高斯波的虚拟源。推导了贝塞尔 - 高斯波的表达式，在适当的极限情况下，该表达式给出了基本贝塞尔 - 高斯光束的傍轴近似。对于方位对称光束，还确定了轴上场的一阶非傍轴修正。在适当的极限情况下，这种非傍轴修正正确地简化为基本高斯光束的修正。
