Diode-pumped Kerr-lens mode-locked ytterbium-doped compositional mixed calcium aluminate laser.

A diode-pumped Kerr-lens mode-locked laser generating 25 fs pulses at 1080 nm is demonstrated with an Yb-doped compositional mixed calcium aluminate crystal. The Yb:Ca(Gd,Y)AlO laser, which operates at a repetition rate of 65.6 MHz via soft-aperture Kerr-lens mode-locking, is pumped by a spatially single-mode, fiber-coupled diode laser.

Growth, spectroscopy and laser operation of Tm,Ho:GdScO perovskite crystal.

We report on the growth, polarized spectroscopy and first laser operation of an orthorhombic (space group Pnma) Tm,Ho-codoped gadolinium orthoscandate (GdScO) perovskite-type crystal. A single crystal of 3.76 at.

Unveiling second harmonic generation from femtosecond-laser microstructured Nd:YAG crystal.

In this work we apply second harmonic microscopy to the analysis of damage tracks inscribed by femtosecond laser irradiation in a Nd:YAG crystal. While second harmonic generation is not expected in the bulk of this centrosymmetric material, the 2D and 3D images obtained via second harmonic microscopy show that the induced micro-modification of the crystal structure leads to a localized generation of the nonlinear signal. The nature of this modification and its dependence on irradiation and detection parameters is discussed.

Computational and experimental microfluidics: Total analysis system for mixing, sorting, and concentrating particles and cells.

Body fluids can potentially indicate the presence of non-small cancer cells. Studying these fluids is an emerging field that could be crucial for cancer detection and monitoring treatment effectiveness. Meanwhile, the examination of fluids on a microscopic level is part of the field of microfluidics.

SESAM mode-locked Yb:GdScO laser.

We report on the investigation of continuous-wave (CW) and SEmiconductor Saturable Absorber Mirror (SESAM) mode-locked operation of a Yb:GdScO laser. Using a single-transverse-mode, fiber-coupled InGaAs laser diode at 976 nm as a pump source, the Yb:GdScO laser delivers 343 mW output power at 1062 nm in the CW regime, which corresponds to a slope efficiency of 52%. Continuous tuning is possible across a wavelength range of 84 nm (1027-1111 nm).

Continuous-wave and SESAM mode-locked operation of a Yb:YSr(PO) laser.

We report on the continuous-wave (CW) and, for what we believe to be the first time, passively mode-locked (ML) laser operation of an Yb-doped YSr(PO) crystal. Utilizing a 976-nm spatially single-mode, fiber-coupled laser diode as pump source, the Yb:YSr(PO) laser delivers a maximum CW output power of 333 mW at 1045.8 nm with an optical efficiency of 55.

Orange surface waveguide laser in Pr:LiYF produced by a femtosecond laser writing.

Depressed-cladding surface channel waveguides were inscribed in a 0.5 at.% Pr:LiYF crystal by femtosecond Direct Laser Writing.

Cascade laser optimization for H → H and F → H sequent transitions in Tm-doped materials.

We study a cascade laser scheme involving the H → H and F → H consecutive transitions in Tm-doped materials as a promising technique to favor laser emission at 2.3 µm. We examine the conditions in terms of the Tm doping levels for which the cascade laser is beneficial or not.

Structure and luminescence properties of Dy doped quaternary tungstate LiBaGd(WO) for application in wLEDs.

Quaternary tungstates with the composition LiBaGd(WO) doped with different concentrations of Dy (from 0.5 to 10 at%) were prepared by the solid-state reaction method at 900 °C. Their structural, spectroscopic and optical properties were studied systematically in this work.

Sub-50 fs diode-pumped SESAM mode-locked Yb:SrF laser.

We report on sub-50 fs pulse generation from a passively mode-locked Yb:SrF laser pumped with a spatially single-mode, fiber-coupled laser diode at 976 nm. In the continuous-wave regime, the Yb:SrF laser generated a maximum output power of 704 mW at 1048 nm with a threshold of 64 mW and a slope efficiency of 77.2%.

56-fs diode-pumped SESAM mode-locked Yb:YAl(BO) laser.

We report on the first sub-60 fs pulse generated from a diode-pumped SESAM mode-locked Yb-laser based on a non-centrosymmetric Yb:YAl(BO) crystal as a gain medium. In the continuous-wave regime, pumping with a spatially single-mode, fiber-coupled 976 nm InGaAs laser diode, the Yb:YAl(BO) laser generated 391 mW at 1041.7 nm with a slope efficiency as high as 65.

Diode-pumped mode-locked Yb:ScSiO laser generating 38 fs pulses.

We report on sub-40 fs pulse generation from a Yb:ScSiO laser pumped by a spatially single-mode fiber-coupled laser diode at 976 nm. A maximum output power of 545 mW was obtained at 1062.6 nm in the continuous-wave regime, corresponding to a slope efficiency of 64% and a laser threshold of 143 mW.

Excited-state absorption and upconversion pumping of Tm-doped potassium lutetium double tungstate.

We report on a bulk thulium laser operating on the H → H transition with pure upconversion pumping at 1064 nm by an ytterbium fiber laser (addressing the F → F excited-state absorption (ESA) transition of Tm ions) generating 433 mW at 2291 nm with a slope efficiency of 7.4% / 33.2% vs.

Kerr-lens mode-locking of an Yb:CLNGG laser.

We report on a Kerr-lens mode-locked laser based on an Yb-doped disordered calcium lithium niobium gallium garnet (Yb:CLNGG) crystal. Pumping by a spatially single-mode Yb fiber laser at 976 nm, the Yb:CLNGG laser delivers soliton pulses as short as 31 fs at 1056.8 nm with an average output power of 66 mW and a pulse repetition rate of ∼77.

Semiconductor saturable absorber mirror mode-locked Yb:YAP laser.

We report on sub-30 fs pulse generation from a semiconductor saturable absorber mirror mode-locked Yb:YAP laser. Pumping by a spatially single-mode Yb fiber laser at 979 nm, soliton pulses as short as 29 fs were generated at 1091 nm with an average output power of 156 mW and a pulse repetition rate of 85.1 MHz.

Kerr-lens mode-locked Yb:YAlO laser generating 24-fs pulses at 1085 nm.

We report on a Kerr-lens mode-locked Yb:YAlO laser generating soliton pulses as short as 24 fs at 1085 nm with an average output power of 186 mW and a pulse repetition rate of 87.5 MHz, representing the shortest pulses ever achieved from any mode-locked laser based on Yb-doped structurally ordered crystal. Optimized for power-scalable operation, the Yb:YAlO laser delivers 1.

Kerr-lens mode-locked ytterbium-activated orthoaluminate laser.

We report on the first, to the best of our knowledge, Kerr-lens mode-locked laser based on an Yb-doped perovskite-type orthoaluminate crystal exploiting two different principal light polarizations. The Yb:(Y,Gd)AlO laser delivers soliton pulses as short as 32 fs at 1067 nm with an average output power of 328 mW and a pulse repetition rate of ∼84.6 MHz for E || a polarization.

Diode-pumped mode-locked Yb:BaF laser.

We report on a continuous-wave (CW) and passively mode-locked operation of a fluorite-type Yb:BaF crystal. Pumped with a spatially single-mode, fiber-coupled InGaAs laser diode at 976 nm, the Yb:BaF laser generated a maximum CW output power of 512 mW at 1054.4 nm, corresponding to a laser threshold of 36.

SESAM mode-locked Yb:SrY(BO) laser.

We demonstrate the first sub-40 fs soliton pulse generation from a diode-pumped Yb:SrY(BO) laser passively mode-locked by a semiconductor saturable absorber mirror. Pulses as short as 38 fs at a central wavelength of 1051.7 nm were achieved with an average output power of 115 mW and a pulse repetition rate of 67.

Soliton mode-locked Yb:CaGd(BO) laser.

We report on a soliton mode-locked Yb:CaGd(BO) laser at ∼1.06 µm stabilized by a semiconductor saturable absorber mirror. Pumping with a single-transverse mode, fiber-coupled laser diode at 976 nm, the Yb:CaGd(BO) laser delivers soliton pulses as short as 39 fs at a central wavelength of 1059.

Diode-pumped SESAM mode-locked Yb:(Y,Gd)AlO laser.

We report on the continuous-wave (CW) and mode-locked (ML) laser performance of an Yb-doped yttrium-gadolinium orthoaluminate crystal, Yb:(Y,Gd)AlO. Pumping by a single-transverse-mode fiber-coupled 976 nm InGaAs laser diode, the maximum output power in the CW regime amounted to 429 mW at 1041.8 nm corresponding to a slope efficiency of 51.

Polarized spectroscopy and SESAM mode-locking of Tm,Ho:CALGO.

A Tm,Ho:CALGO laser passively mode-locked by a GaSb-based SESAM generated pulses as short as 52 fs at a central wavelength of 2015 nm with a broad spectral bandwidth of 82 nm (full width at half maximum) owing to the combined gain profiles of both dopants for σ-polarized light. The average output power reached 376 mW at a repetition rate of 85.65 MHz.

SWCNT-SA mode-locked Tm,Ho:LCLNGG laser.

Sub-100 fs pulse generation from a passively mode-locked Tm,Ho-codoped cubic multicomponent disordered garnet laser at ∼2 µm is demonstrated. A single-walled carbon nanotube saturable absorber is implemented to initiate and stabilize the soliton mode-locking. The Tm,Ho:LCLNGG (lanthanum calcium lithium niobium gallium garnet) laser generated pulses as short as 63 fs at a central wavelength of 2072.