Efficient 2075-nm laser emission from Ho-doped fluorotellurite glass in a compact all-fiber structure.

In this Letter, we report an Ho-doped fluorotellurite glass all-fiber laser at 2075 nm. The gain fiber is pumped in-band with a 1976-nm fiber laser and connected by fusion splicing. A high-quality fusion splicing point with a loss of < 0.

Direct femtosecond laser inscription of Bragg gratings in Ho/Pr co-doped AlF-based glass fibers for a 2.86 µm laser.

In this Letter, we report the fabrication of fiber Bragg gratings (FBGs) in home-made Ho/Pr co-doped single-cladding fluoroaluminate (AlF) glass fibers and its application in watt-level lasing at the mid-infrared (MIR) wavelength of 2.86 µm. The FBGs were inscribed using an 800 nm femtosecond (fs) laser direct-writing technique.