1 June 2005 Raman fiber laser with two parallel couplers
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Optical Engineering, 44(6), 064203 (2005). doi:10.1117/1.1926167
We report an intracavity ring laser constructed using two parallel directional fiber couplers that generates up to sixth-order cascaded Stokes. Pumping with 1117 nm results in a Raman fiber laser operating at 1572 nm. Using 4.2-W pump power and a fiber Bragg grating at 1117 nm to reflect the residual pump, we obtain an output power of 0.65 W, and hence near 15% conversion efficiency. The linewidths of the dual-coupler laser are significantly narrower than those of the single-coupler laser. This enhanced wavelength selectivity is attributed to the significant increase in the contrast or the finesse of compound ring resonators constructed with two parallel couplers.
Jafar G. Naeini, Kamran Ahmad, "Raman fiber laser with two parallel couplers," Optical Engineering 44(6), 064203 (1 June 2005). https://doi.org/10.1117/1.1926167

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