Alcatel

Thierry Lopez

Carlos Luis De Barros

Dominique Bayart

Catherine Martinelli

Florence Leplingard

Sophie Borne

Xavier Normandin

Disclosed is a Raman laser device () having a first cavity in which lasing occurs at a first frequency, and at least one second cavity in which lasing occurs at a second frequency. Thereby respective first and second waves inside the respective cavities are generated having a first power and a second power, respectively. Further, beams propagating outside the cavities are generated by coupling out a part of the first power and a part of the second power utilizing respective output mirrors. The part of the second power that is coupled out is attenuated without attenuating the complementary part of the second power remaining in the second cavity. The Raman laser device is characterized in that the part of the second power that is coupled out is attenuated utilizing at least one Fiber Bragg Grating ().

Multiple output Raman fiber laser with stable and small output power for seed applications

The present invention relates to a cascaded multi-wavelength Raman fiber laser adapted for emitting radiation of at least one wavelength &lgr; , with a length of optical fiber ( ) having input ( ) and output ( ) sections, means ( ) for introducing pump radiation of wavelength &lgr; into said length of optical fiber ( ), at least one pair of spaced-apart reflector means ( ), 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 and 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 ( ).

Cascaded Raman fiber laser, and optical system including such a laser

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Paris, France

Thierry Lopez