We demonstrate a novel amplification regime in a counter-pumped, relatively long (2
meters), large mode area, highly Yb-doped and polarization-maintaining tapered fiber …

Ultrabroadband amplification and two-color CW lasing simultaneously near 1.9 μm and 2.3
μm in a Tm3+-doped tellurite fiber were demonstrated experimentally, for the first time to the …

We present a birefringent Yb-doped tapered double-clad fiber with a record core diameter of
96 µm. An impressive gain of over 38 dB was demonstrated for linearly polarized CW and …

We manufactured and characterized a low-loss gain fiber based on high-purity TeO 2–ZnO–
La 2 O 3–Na 2 O undoped glass for 100-μm cladding and TeO 2–ZnO–La 2 O 3–Na 2 O …

Compared with conventional uniform fibers, long tapered fibers provide an effective way to
maintain beam quality and suppress the generation of nonlinear effects in fiber lasers. In this …

Ultrafast fiber lasers combining high peak power and excellent beam quality in the 1-µm
wavelength range have been explored to applications in industry, medicine and …

We propose a novel saddle-shaped Yb-doped fiber design for high power generation in the
spectral range near 0.976 μm. The fiber has a central single-mode part with a core diameter …

Thanks to the advantage of balancing nonlinear effects and transverse mode instability, vary
core diameter active fiber (VCAF) has been widely used in high power ytterbium-doped fiber …

Output power scaling of single mode large mode area (LMA) photonic crystal fiber (PCF)
amplifiers urgently requires the low refractive index of Yb^ 3+-doped silica glasses whilst …

We report a high-power all-fiber-integrated femtosecond chirped pulse amplification system
operating at 1064 nm, which consists of a dispersive wave source, a fiber stretcher, a series …