Patent ID: 6041072
Filing Date: 2000-03-21
Classification: G02B,H01S

Abstract:
Apparatus for providing a stable laser pump source comprising:a plurality of semiconductor laser pump sources having respective lasing cavities capable of lasing within a narrow bandwidth of wavelengths and providing spectral beam outputs at their respective laser exit facets at least one of which having distinguishable optical characteristics from one another;an optical element to optically combine said beam outputs into a single beam output;an optical fiber coupled to receive said single beam output;at least one fiber grating formed in said apparatus, said at least one fiber grating having a reflectivity band for reflecting a portion of either of said spectral beam outputs or of said single beam back into at least one of said laser pump sources for providing a small portion of selected wavelengths within a gain bandwidth of said at least one of laser pump sources suppressing the magnitude of intensity noise in said single beam output.