We show that the reduction in visibility of the speckle pattern obtained from laser light that has been passed through a step-index light guide can be found from a knowledge of the model dispersion of the guide, and the bandwidth of the laser beam.
© 1976 Optical Society of America
B. Crosignani, B. Daino, and P. Di Porto, "Speckle-pattern visibility of light transmitted through a multimode optical fiber," J. Opt. Soc. Am. 66, 1312-1313 (1976)