2-W continuous-wave and passively Q-switched Tm,Ho:YLF channeled waveguide laser at 2.05 µm.

We report on the operation of an efficient Tm,Ho:YLF depressed cladding, channeled waveguide laser in both continuous-wave (CW) and passively Q-switched (PQS) regimes, producing laser emission at the wavelength of 2.05 µm. The 70-µm diameter depressed cladding waveguide, fabricated using femtosecond laser inscription, had a low propagation loss value of 0.

Er:YLiF channeled waveguide laser near 2.7-2.8 µm fabricated by femtosecond laser inscription.

We report, for the first time to our knowledge, a demonstration of robust waveguide lasing near 2.7-2.8 µm in an erbium-doped fluoride host.

Near-Infrared Triggered Degradation for Transient Electronics.

Electronics that disintegrate after stable operation present exciting opportunities for niche medical implant and consumer electronics applications. The disintegration of these devices can be initiated due to their medium conditions or triggered by external stimuli, which enables on-demand transition. An external stimulation method that can penetrate deep inside the body could revolutionize the use of transient electronics as implantable medical devices (IMDs), eliminating the need for secondary surgery to remove the IMDs.

Broadly tunable continuous wave 2.3-µm Tm:tellurite bulk glass laser.

We report, for the first time to the best of our knowledge, a continuous wave trivalent thulium ion (Tm)-doped bulk glass near 2.3 µm. In the experiments, a bulk Tm-doped tellurite glass with the stoichiometric composition of 74TeO-12ZnO-4LaO-10NaO (Tm:TZLN) was used.

Laser-micromachined zebra-patterned graphene as a mode locker with adjustable loss.

In this Letter, we describe a novel, to the best of our knowledge, device based on micro-structured graphene, referred to as zebra-patterned graphene saturable absorber (ZeGSA), which can be used as a saturable absorber with adjustable loss to initiate femtosecond pulse generation. Femtosecond laser micro-machining was employed to ablate monolayer graphene on an infrasil substrate in the form of stripes with a different duty cycle, resulting in the formation of regions with variable insertion loss in the 0.21%-3.

Upconversion pumping of a 2.3 µm Tm:KYF laser with a 1064 nm ytterbium fiber laser.

We report efficient lasing of the isotropic ${{\rm Tm}^{3 + }}\!:\!{{\rm KY}_3}{{\rm F}_{10}}$Tm:KYF crystal near 2.3 µm via upconversion pumping with a 1064 nm ytterbium fiber laser as the pump source. When pumped at 1064 nm, an x-cavity ${{\rm Tm}^{3 + }}\!:\!{{\rm KY}_3}{{\rm F}_{10}}$Tm:KYF laser operated at the free-running wavelength of 2344 nm.