High-power widely tunable thulium fiber lasers

Abstract

Applications requiring long-range atmospheric propagation are driving the development of high-power thulium fiber lasers. We report on the performance of two different laser configurations for high-power tunable thulium fiber lasers: one is a single oscillator utilizing a volume Bragg grating for wavelength stabilization; the other is a master oscillator power amplifier system with the oscillator stabilized and made tunable by a diffraction grating. Each configuration provides >150 W of average power, >50% slope efficiency, narrow output linewidth, and >100 nm tunability in the wavelength range around 2 μm.

Tunable passively Q-switched thulium-doped fiber laser operating at 1.9 μm using arrayed waveguide grating (AWG)

“…In addition, tunability of basic TDF lasers in the 2.0 mm wavelength region has already been widely demonstrated by using volume Bragg gratings (VBGs) [29][30][31], and also by the use of diffraction gratings [18,32]. However, these methods are quite complex due to the use of bulky optic components in the laser cavity.…”

Mid-infrared fiber optical parametric oscillator using a three- hole suspended-core chalcogenide fiber

“…The suspended core structure is a feasible way to realize wide band ZDW shift [2]. Recently, thulium-doped fiber lasers (TDFLs) provide highquality lasing from 1.8 to 2.1 μm with high average power and high slope efficiency [3], which becomes a promising choice to serve as the pump of a chalcogenide FOPO. In this paper, we proposed a MIR FOPO using a three-hole As2S5 suspended-core fiber (SCF) with a core diameter of 2.6 μm as the gain medium.…”

Tunable Dual-Wavelength Thulium-Doped Fiber Laser by Employing a HB-FBG

“…McComb et al reported the performance of a laser configuration for high power tunable TDFL. The fiber laser was based on a master oscillator power amplifier system with the oscillator stabilized and tuned by a diffraction grating [5]. Li et al achieved a direct diode-pumped all-fiber tunable laser source at 2-μm band with a tuning range of more than 250 nm [6].…”