Widely Tunable Dual-Wavelength Thulium-doped fiber laser Operating in 1.8-2.0 mm Region

Stable Multi-Wavelength Thulium-Doped All-Fiber Laser Incorporating a Multi-Cavity Fabry–Perot Filter

“…All-fiber multi-wavelength thulium-doped fiber lasers (TDFLs) capable to operate near the 2-μm region have received a great deal of attention in recent years; this has to do mainly with their potential of practical applications in science and industry [1]- [6]. At present, several approaches have been reported to perform stable multi-wavelength generation in TDFLs [7]- [20]. These methods include, for example, the use of Sagnac loop mirrors [7], [9], [15], [16], Fabry-Perot [18] or Mach-Zehnder [8], [11], [16] interferometers, specialty optical fibers [11], [19], mode-beating filters [7], [12], and fourwave mixing techniques [10], among others [13], [17], [20].…”

“…At present, several approaches have been reported to perform stable multi-wavelength generation in TDFLs [7]- [20]. These methods include, for example, the use of Sagnac loop mirrors [7], [9], [15], [16], Fabry-Perot [18] or Mach-Zehnder [8], [11], [16] interferometers, specialty optical fibers [11], [19], mode-beating filters [7], [12], and fourwave mixing techniques [10], among others [13], [17], [20]. Recently, the fiber laser community have spent its efforts to develop fiber-optic devices operating in the 2-μm region, as a consequence, new configurations of fiber components and TDFLs continue to be suggested following this research line.…”

A 70 W thulium-doped all-fiber laser operating at 1940 nm

“…Compared with bulk solid-state lasers, cladding-pumped fiber lasers offer a compact solution to the need for both high power and good beam quality [18]. High power diode-pumped Tm 3+ -doped fiber lasers (TDFLs) are high efficiency emission sources in the 1.9÷2.1 μm region [19][20][21]. Furthermore, medical TDFLs have several potential advantages over the 2 μm holmium lasers, like continuous or pulsed output, less thermal damage to a tissue, they are more compactable, and have better beam quality, which is important when the laser output has to be integrated with a fiber probe of small core diameter.…”