title: Quantitative mode quality characterization of fibers with extremely large mode areas by matched white-light interferometry.
abstract: Quantitative mode characterization of fibers with cores much beyond 50µm is difficult with existing techniques due to the combined effects of smaller intermodal group delays and dispersions. We demonstrate, for the first time, a new method using a matched white-light interferometry (MWI) to cancel fiber dispersion and achieve finer temporal resolution, demonstrating ~20fs temporal resolution in intermodal delays, i.e. 6µm path-length resolution. A 1m-long straight resonantly-enhanced leakage-channel fiber with 100µm core was characterized, showing ~55fs/m relative group delay and a ~29dB mode discrimination between the fundamental and second-order modes.
authors: Fanting
authors: F
authors: Kong
authors: Guancheng
authors: G
authors: Gu
authors: Thomas W
authors: TW
authors: Hawkins
authors: Joshua
authors: J
authors: Parsons
authors: Maxwell
authors: M
authors: Jones
authors: Christopher
authors: C
authors: Dunn
authors: Monica T
authors: MT
authors: Kalichevsky-Dong
authors: Stephen P
authors: SP
authors: Palese
authors: Eric
authors: E
authors: Cheung
authors: Liang
authors: L
authors: Dong