title: Single-frequency Brillouin distributed feedback fiber laser.
abstract: We demonstrate a single-frequency Brillouin distributed feedback laser (DFB). The DFB laser cavity was a 12.4 cm long fiber Bragg grating with a π-phase shift offset from the grating center. It exhibited a threshold of 30 mW and conversion efficiency from pump to Stokes wave as high as 27%. Higher-order Stokes waves were suppressed by more than 20 dB. The Stokes output of the laser could be obtained in either the forward or backward direction, simply by changing the orientation of the offset of the discrete phase shift with respect to the pump propagation direction. The DFB laser operated over a pump frequency range of 1.2 GHz, more than 60 times larger than the SBS gain bandwidth.
authors.affiliation: OFS Laboratories, Somerset, New Jersey 08873, USA. kabedin@ofsoptics.com
authors.forename: Kazi S
authors.initials: KS
authors.lastname: Abedin
authors.forename: Paul S
authors.initials: PS
authors.lastname: Westbrook
authors.forename: Jeffrey W
authors.initials: JW
authors.lastname: Nicholson
authors.forename: Jerome
authors.initials: J
authors.lastname: Porque
authors.forename: Tristan
authors.initials: T
authors.lastname: Kremp
authors.forename: Xiaoping
authors.initials: X
authors.lastname: Liu