AI Article Synopsis
- The study details the creation of fiber Bragg gratings (FBGs) in custom-made Ho/Pr co-doped fluoroaluminate glass fibers for mid-infrared (MIR) lasing at 2.86 µm.
- FBGs were made using an 800 nm femtosecond laser, with various parameters like pulse energy and grating order tested, resulting in a highly reflective second-order FBG.
- With laser pumping at 1150 nm, the fiber produced over 1 W of power and demonstrated a laser efficiency of 17.7%, along with a bandwidth of 0.46 nm and good spectral stability.
Article Abstract
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. The FBG properties were investigated for different pulse energies, inscription speeds, grating orders, and transversal lengths. A second-order FBG with a high reflectivity of 99% was obtained at one end of a 16.5-cm-long gain fiber. Under 1150 nm laser pumping, this fiber yielded a power exceeding 1 W at 2863.9 nm with an overall laser efficiency of 17.7%. The fiber laser showed a FWHM bandwidth of 0.46 nm and long-term spectral stability.
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| http://dx.doi.org/10.1364/OL.448431 | DOI Listing |
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