Recent developments in lanthanide-doped mid-infrared fluoride fiber lasers [Invited].

Mid-infrared fiber sources, emitting between 2.5 µm and 5.0 µm, are interesting for their great potential in several application fields such as material processing, biomedicine, remote sensing and infrared countermeasures due to their high-power, their diffraction-limited beam quality as well as their robust monolithic architecture.

1.4 W in-band pumped Dy-doped gain-switched fiber laser at 3.24 µm.

In this Letter, we report, to the best of our knowledge, the first demonstration of an in-band pumped gain-switched -doped fiber laser operating at 3.24 µm. The monolithic cavity bounded by two fiber Bragg gratings was pumped by a gain-switched -doped fiber system.

10-W-level monolithic dysprosium-doped fiber laser at 3.24 μm.

We report, to the best of our knowledge, the first entirely monolithic dysprosium (Dy)-doped fluoride fiber laser operating in the mid-IR region. The system delivers 10.1 W at 3.

Ultrafast Dy:fluoride fiber laser beyond 3 μm.

We report a passively mode-locked Dy:fluoride fiber laser emitting around 3.1 μm based on the nonlinear polarization evolution technique in a ring configuration, using in-band pumping at 2.8 μm.

20 W splice-free erbium-doped all-fiber laser operating at 1610 nm.

We report on a splice-free erbium-doped all-fiber laser emitting over 20 W at a wavelength of 1610 nm, with a slope efficiency of 19.6 % and an overall efficiency of 18.3% with respect to the launched pump power at 976 nm.