Patent ID: 6434172
Filing Date: 2002-08-13
Classification: H01S

Abstract:
An article comprising a fiber Raman device comprising:a) a length of silica-bases optical fiber comprising first and second wavelength-selective elements in the fiber to provide an optical cavity; b) a first coupler for coupling pump radiation of a first wavelength &lgr;1 from a first pump radiation source into said optical fiber; and c) means for providing a Raman device output radiation of wavelength &lgr;0 to output radiation utilization means, where &lgr;0 >&lgr;1; CHARACTERIZED IN THAT the Raman device further comprises d) a second coupler for coupling pump radiation of a second wavelength &lgr;2 from a second pump radiation source into said optical fiber, where &lgr;2 is different from &lgr;1, with &lgr;0>&lgr;2, and wherein at least one of said wavelength-selective elements if off resonance with regard to at least one of &lgr;1 and &lgr;2.