“…The latter is also referred to as ''aperture dispersion''. 5,6,13,14) Since then, Many studies have used different kinds of light sources (e.g., Bessel-Gauss beam, 11) Gaussian-Schell model, 9) Gaussian pulse 5,6) ) or various optical elements (e.g., single slit, 10) double slit, 8) circular aperture, 13) gratings 14) ) to study these spectral anomalies in the near field or far field; some of these studies have been experimentally verified. [15][16][17] In this article, an adjustable tilted mirror is used to cause the far field spectral changes for a Gaussian short pulse.…”