Patent ID: 8687659

Claim:
A system for generating a millimeter wave signal ( 100 ) comprising: a Brillouin-Erbium fiber laser ( 101 ) including: a source laser ( 105 ) for transmitting a seed signal; an optical directional coupler ( 110 ) having a first input that receives said seed signal from said source laser and a first output; an Erbium doped fiber amplifier ( 115 ) having an input connected to said first output of said optical directional coupler and an output wherein said Erbium doped fiber amplifier amplifies said seed signal; a four port circulator ( 120 ) having a first port that receives said seed signal from said Erbium doped fiber amplifier; a Brillouin gain medium ( 135 ) connected to a second port and third port of said circulator, wherein said seed signal propagates through said Brillouin gain medium in a first direction and a first order Stokes signal propagates through said Brillouin gain medium in a second direction to generate a second order Stokes signal propagating in said first direction; a fourth port of said circulator connected to a second input of said optical directional coupler wherein said optical directional coupler receives said signal from said fourth port of said circulator and outputs a portion of said signal to a first output and a second portion to a second output of said optical directional coupler; and a first isolator having a first end connected to said second output of said optical directional coupler, said first isolator having a second end connected to a first end of a first fiber Bragg grating, wherein said fiber Bragg grating reflects second-order and fourth-order Stokes signals, and wherein said reflected Stokes signals are absorbed by said first isolator.