Design and modeling of tunable mid-IR fiber laser using Thulium doped fibers

All-fiber tunable ring laser source near 2 μm designed for CO2 sensing

“…A ring configuration is useful for tunable operation, in which tuning can be obtained either by utilizing a tunable filter, or by introducing loss variation within the cavity [19]. The tunability with loss variation of a Tm-doped fiber laser pumped at 793 nm has been studied numerically [20] although experimental demonstration is not reported other than our own preliminary work [21] to the best of our knowledge. An experimental study that analyzes the range of tuning and provides the optimum conditions is essential for commercialization of this technology.…”

Gain-controlled Broadband Tuneability in Self-Mode-locked Thulium-doped Fibre Laser Through Variable Feedback

“…However, there are no active means of manipulating the parameters of active fibre during laser operation, but only at the laser development stage. The intracavity loss modulation has been applied in a few research works for filter-less tuneability by introducing variable attenuators 23,[30][31][32][33] . Nevertheless, the presented attempts of controlling wavelength-independent losses have not demonstrated remarkable tuneability ranges.…”

“…Nevertheless, the presented attempts of controlling wavelength-independent losses have not demonstrated remarkable tuneability ranges. While theoretical work predicted the possibility of achieving a 105 nm tuneability in a continuous-wave Tm-doped fibre laser 32 , only a range of 36 nm and 48 nm has been verified in the experiment 30,31 . Overall, all works have investigated continuous-wave laser operation, leaving tuneability of ultrashort pulsed generation by loss management unexplored.…”