Patent ID: 7590155

Claim:
A laser system, comprising: a. a seed laser configured to emit input laser pulses; b. a laser pump configured to produce a pump light; c. a fiber-based laser gain medium comprising a fiber core, a cladding surrounding the fiber core, and a first fiber Bragg grating (FBG) in the fiber core, wherein the fiber-based laser gain medium is configured to receive the input laser pulses and the pump light at a first end of the fiber core, amplify the input laser pulses in response to the pump light, and output amplified laser pulses at a second end of the fiber core, wherein the first FBG is configured to break phase match of stimulated Brillouin scattering (SBS) in the amplified laser pulses, wherein the first FBG does not deflect a substantial portion of the amplified laser pulses out of the cladding; d. an optical coupling component configured to project the input laser pulses and the pump light into the laser gain medium; and e. a second FBG configured to pass the amplified laser pulses and reflect the pump light back to the fiber-based laser gain medium.