Bend-induced distortion is an important limitation in the development of fibers with very large mode areas. Simulations demonstrate that higher-order modes, recently proposed for amplification, are naturally immune to bend distortion, despite their extremely large mode areas. These numerical results compliment measured resistance to mode coupling. An interesting indirect coupling between nearly degenerate modes is shown to dominate the distortion.
© 2007 Optical Society of America
Fiber Optics and Optical Communications
Original Manuscript: September 11, 2006
Manuscript Accepted: November 12, 2006
Published: March 5, 2007
John M. Fini and Siddharth Ramachandran, "Natural bend-distortion immunity of higher-order-mode large-mode-area fibers," Opt. Lett. 32, 748-750 (2007)