title: Higher-order mode fiber enables high energy chirped-pulse amplification.
abstract: Energy scaling of femtosecond fiber lasers has been constrained by nonlinear impairments and optical fiber damage. Reducing the optical irradiance inside the fiber by increasing mode size lowers these effects. Using an erbium-doped higher-order mode fiber with 6000 µm(2) effective area and output fundamental mode re-conversion, we show a breakthrough in pulse energy from a monolithic fiber chirped pulse amplification system using higher-order mode propagation generating 300 µJ pulses with duration <500 fs (FWHM) and peak power >600 MW at 1.55 µm. The erbium-doped HOM fiber has both a record large effective mode area and excellent mode stability, even when coiled to reasonable diameter. This demonstration proves efficacy of a new path for high energy monolithic fiber-optic femtosecond laser systems.
authors: Xiang
authors: X
authors: Peng
authors: Kyungbum
authors: K
authors: Kim
authors: Michael
authors: M
authors: Mielke
authors: Tim
authors: T
authors: Booth
authors: Jeffrey W
authors: JW
authors: Nicholson
authors: John M
authors: JM
authors: Fini
authors: Xiaoping
authors: X
authors: Liu
authors: Anthony
authors: A
authors: Desantolo
authors: Paul S
authors: PS
authors: Westbrook
authors: Robert S
authors: RS
authors: Windeler
authors: Eric M
authors: EM
authors: Monberg
authors: Frank V
authors: FV
authors: Dimarcello
authors: Cliff
authors: C
authors: Headley
authors: David J
authors: DJ
authors: Digiovanni