High-Power Broadband Single-Mode ASE Source Near 2 μm Based on Thulium-doped Fiber

We demonstrate a thulium doped fiber amplified spontaneous emission sources pumped by a Raman fiber laser at 1579 nm and 1693 nm. A single mode, maximum output power of 550 mW at the center wavelength of 1880 nm with FWHM of 140 nm has been achieved.