Large-mode area (LMA) thulium-doped fibers (TDF) are one of the key components when designing 2μm laser and amplifier systems aiming to further scale deliverable output powers. Current design limitations of LMA TDF’s affecting optical-to-optical efficiency and output beam quality are well-understood.

Jan 28, 2019 · A relatively new single-use, silicone-made, laryngeal mask airway, the LMA ® Protector TM (Teleflex Medical Europe, Westmeath, Ireland) 1 has been recently introduced (Fig. 1), combining a pharyngeal chamber and dual gastric drainage channels.

More recently the extension of LMA fiber technology to eyesafe wavelengths and in particular highly efficient Tm-doped fibers has seen the development of a new operating window for high power fiber lasers at 2μm.

As examples, we demonstrate both grating based oscillators and monolithic power amplifiers using fiber-coupled diode pumps, TFB pump couplers and Tm-doped LMA fiber technology all delivering >100W output power with slope efficiencies of 55-60%.

Mar 7, 2017 · Large-mode area (LMA) thulium-doped fibers (TDF) are one of the key components when designing 2μm laser and amplifier systems aiming to further scale deliverable output powers.

Oct 3, 2023 · Abstract: The influence of Tm-doped pedestal fiber splice on the output performance of a large-mode-area (LMA) Tm-doped fiber laser (TDFL) has been investigated. Arc-fusion induced refractive-index deformation leads to laser leakage from the core to the pedestal, resulting in a periodic decrease in the output power of TDFL.

Dec 16, 2019 · We report a passively mode-locked fiber oscillator based on thulium-doped large-mode-area (LMA) fiber. Reliably mode-locking soliton operation can be readily achieved after the suppression of the higher-order modes by using mode field adapters in …

Mar 1, 2022 · For the purpose of realizing the large-mode-area (LMA) fibers with low and flat normal group velocity dispersion (GVD) profiles, the approach based on the multicore fiber (MCF) consisting of identical cores is proposed.

Feb 15, 2020 · Here we develop a 2 μ m Tm-doped LMA fiber laser passively mode-locked and Q-switched with a SESAM. The near-fundamental-mode mode-locked operation is achieved through transverse mode filtering and saturable absorption of the SESAM.

Tm: Recent results indicate 50% - 60% optical-to-optical! > 65 % slope efficiency lasers at 2 μm, based on high-efficiency Tm fibers. True LMA Er/Yb and Tm fibers are now available for high-power SM output at eye-safe wavelengths.