Patent ID: 7949017

Claim:
A multimode-fiber Raman laser comprising: a pump source configured to provide optical radiation centered at a pump wavelength λ p and characterized by a spectral bandwidth greater than 100 MHz, thereby inducing negligible stimulated Brillouin scattering; and an oscillator resonant at an emission wavelength λ n greater than the pump wavelength, the oscillator including: an input coupler optically aligned with the pump source; and a multimode optical fiber optically coupled to the input coupler, the multimode optical fiber comprising: an input section having a fiber Bragg grating characterized by a first predetermined reflectance at the emission wavelength; an intracavity section of a predetermined length optically coupled to the input section, the intracavity section being subjected to a Stimulated Raman Scattering (SRS) process thereby enabling power generation at arbitrary wavelengths; and an output section having a fiber Bragg grating characterized by a second predetermined reflectance at the emission wavelength and optically coupled to the intracavity section; and an output coupler optically coupled to the multimode optical fiber and configured to provide a laser output at the emission wavelength.