Yes, but you would need to use a different component. The Optical Fiber component models a singlemode fiber.
You can try either the Linear Multimode Fiber or one of the spatial models in the Multimode Library/Optical Fibers folder.
The Linear Multimode Fiber allows you to explicitly state the modal delay, whereas the two spatial components will calculate the modal dispersion from the actual modes that exist for the described index of refraction distribution. If you get confused by the difference just take a look at the associated Help for each.
Cheers!