High-power dual-wavelength Ho-doped fiber laser at >2 μm tandem pumped by a 1.15 μm fiber laser

Abstract

We demonstrated a high-power continuous-wave (CW) dual-wavelength Ho-doped fiber laser (HDFL) at 2049 nm and 2153 nm with a simple coupled-cavity configuration. A ~100 W laser diode-pumped fiber laser at 1150 nm served as the pump source. The maximum output power reached ~22.3 W and the slope efficiency was 23%. By altering the incident pump power, the power ratio of two signal wavelengths could be tuned in a large range due to gain competition. As far as we know, this is the first CW dual-wavelength HDFL with the power exceeding ten-watt-level, and the first dual-wavelength HDFL with the central wavelengths exceeding 2.0 μm and 2.15 μm respectively.

Optimization of erbium and ytterbium concentration in nanostructured core fiber for dual-wavelength fiber lasers

“…Silica glasses are another possible material for matrix hosting REE in ultrafast fiber lasers because the maturity of silica fiber technology provides an abundance of fiber components, i.e., polarization maintaining fibers and polarization controllers, wavelength-division multiplexers for coupling and outcoupling, as good fusion splicing compatibility. Silica has been used as a matrix for Ho-doped fiber lasers operating at two wavelengths above 2 m [10]. However, silica glass suffers from several drawbacks, such as high phonon energy and low REE ion solubility, both of which hinder luminescence properties.…”

80-W dual-wavelength green pulsed laser based on a Yb-doped rod-type fiber amplifier

“…Dual-wavelength fiber lasers have been developed for many applications such as spectroscopy, distance measurement, and radio-frequency or THz generation [8][9][10]. However, their power levels have been only several watts or less, and the wavelength range has been limited in the nearinfrared (NIR) range.…”

Thermal effects on tapered holmium-doped fiber amplifiers

“…Among them, the development of high-power lasers for LIDAR (due to its excellent atmospheric transmission), gas sensing, medicine, material processing, and nonlinear optical conversion in the mid-infrared. [1][2][3][4][5] In this context, many efforts have been made to improve the performance of holmium-doped fiber lasers. One interesting strategy is using a tapered-doped fiber to increase the absorption of the pump along the doped core, which consequently helps improve the power conversion between the pump and signal.…”