title: Suppression of stimulated Brillouin scattering in optical fibers using a linearly chirped diode laser.
abstract: The output of high power fiber amplifiers is typically limited by stimulated Brillouin scattering (SBS). An analysis of SBS with a chirped pump laser indicates that a chirp of 2.5 × 10(15) Hz/s could raise, by an order of magnitude, the SBS threshold of a 20-m fiber. A diode laser with a constant output power and a linear chirp of 5 × 10(15) Hz/s has been previously demonstrated. In a low-power proof-of-concept experiment, the threshold for SBS in a 6-km fiber is increased by a factor of 100 with a chirp of 5 × 10(14) Hz/s. A linear chirp will enable straightforward coherent combination of multiple fiber amplifiers, with electronic compensation of path length differences on the order of 0.2 m.
authors: U.S. Army Research Laboratory, 2800 Powder Mill Road, Adelphi, Maryland 20783, USA. jeffrey.owen.white@us.army.mil
authors: J O
authors: JO
authors: White
authors: A
authors: A
authors: Vasilyev
authors: J P
authors: JP
authors: Cahill
authors: N
authors: N
authors: Satyan
authors: O
authors: O
authors: Okusaga
authors: G
authors: G
authors: Rakuljic
authors: C E
authors: CE
authors: Mungan
authors: A
authors: A
authors: Yariv