A delay term in the expression governing these entities is equal to negative
The parameter product of one of these entities is equal to lambda over pi, and the parameter "M-squared" is found by taking the ratio of the BPP of a given entity with the BPP of one of these. A delay term in the expression governing these entities is equal to negative i times the inverse tangent of a normalized z-coordinate and is called the Guoy shift. At the Rayleigh length, the width of one of these constructs is equal to the square root of two times their width at their narrowest point, which can be specified from the imaginary part of their complex parameter q. The paraxial form of the Helmholtz equation governs these (*) idealized entities, whose governing equation can be combined with a Laguerre polynomial to describe all orders of TEM modes. Diffractive elements can transform them into top-hat or flat-top profiles, and their narrowest point is called their waist. These idealized entities are the lowest-order transverse modes of an ideal optical resonator. For 10 points, name this ideal type of laser beam whose irradiance can be approximated by using a normal distribution.
The parameter product of one of these entities is equal to lambda over pi, and the parameter "M-squared" is found by taking the ratio of the BPP of a given entity with the BPP of one of these.
Gaussian beam [prompt on beam, laser, laser beam, ideal laser beam, zero-order laser beam, light beam, transverse mode of a laser, etc]