Nanosecond Raman Laser at 2840 nm Based on a Methane-filled Revolver Fiber

High-average-power gas fiber Raman laser operating at 2840 nm is demonstrated. The Raman laser is based on methane-filled hollow-core revolver silica fiber pumped by Erdoped fiber laser at 1560 nm. Average output power of about 0.6 W is generated at the Stokes wavelength.