Patent ID: 6836488
Filing Date: 2004-12-28
Classification: H01S

Abstract:
A cascaded multi-wavelength Raman fiber laser adapted for emitting radiation of at least one wavelength &lgr;s1, comprising:a length of optical fiber having input and output sections means for introducing pump radiation of wavelength &lgr;p into said length of optical fiber at least one pair of spaced-apart reflector means, said pair defining an optical cavity belonging to said optical fiber, each of said reflector means having a center wavelength, the reflector means of each pair being located respectively at said input section and said output section of said optical fiber at least one of said pairs of reflector means having its reflector means located at said output section, called output reflector means, having a lower reflectivity at said center wavelength than the corresponding reflector means of the same pair located at said input section, so as to emit radiation of said output wavelengths out of said optical fiber wherein the reflectivity vs. wavelength function of said output reflector means is such that the difference between the wavelengths of maximum and minimum reflectivity is at least 1 nm so that the reflectivity of said output reflector means at said output wavelength is adjustable.