Tunable holmium-doped fiber laser with multiwatt operation from 2025 nm to 2200 nm

Wide wavelength selectable all-fiber thulium doped fiber laser between 1925 nm and 2200 nm.

We demonstrate an all-fiber Tm(3+)-doped silica fiber laser operating at a wide selectable wavelength range by using different fiber Bragg gratings (FBGs) as wavelength selection elements. With a specifically designed high reflective (HR) FBG and the fiber end as an output coupler, the lasing in the range from 1975 nm to 2150 nm with slope efficiency of >30% can be achieved. By employing a low ...

High power, continuous-wave ytterbium-doped fiber laser tunable from 976 to 1120 nm.

We report on a linearly-polarized, continuous-wave Ytterbium-doped fiber laser continuously tunable on the fly over an unprecedented emission bandwidth ranging from 976 nm to 1120 nm and delivering a minimum of 10 W and a maximum of 41 W. Additionally, the bandwidth of the system can be tuned from 100 pm to more than 1 nm at all wavelengths.

1083 nm Ytterbium doped tunable fiber laser for 3 He pumping applications

A broadband Ytterbium-doped tunable fiber laser for 3He optical pumping at 1083 nm

Large amounts of hyperpolarized He gas with high nuclear polarization rates are required for use in neutron spin filters or nuclear magnetic resonance imaging of human lung. Very high efficiency can be obtained by metastability exchange optical pumping using multimode lasers to excite the 2S-2P transition at 1083 nm. Broadband Ytterbium-doped tunable fiber lasers have been designed for that par...

Alternate Wavelength Switching in a Widely Tunable Dual-Wavelength Tm3þ-Doped Fiber Laser at 1900 nm

We demonstrate alternate wavelength switching in a widely tunable, dualwavelength Tm3þ-doped fiber laser operating at 1900 nm. A comb filter based on a Sagnac loop incorporating a length of high-birefringence fiber is used to define the lasing wavelengths. By simple variation of a polarization controller within the laser cavity, alternate and sequential switching between singleand dual-waveleng...