Emergence of products that feature functional surfaces with complex geometries, such as freeform optics in consumer electronics and augmented reality virtual reality, requires high-accuracy non-contact surface measurement. However, large discrepancies are often observed between the measurement results optical methods contact stylus methods, especially for surfaces. For interference microscopy, coherence scanning interferometry, three-dimensional transfer function provides information about...

We experimentally investigate the limits of pulse duration in a Kerr-lens mode-locked Yb:YAG thin-disk laser (TDL) oscillator. Thanks to its excellent mechanical and optical properties, is one most used gain materials for continuous-wave pulsed TDLs. In operation, 8-nm wide bandwidth only directly supports pulses with minimum approximately 140 fs. For achieving shorter pulses, TDL oscillator can be operated strongly self-phase modulation (SPM) broadened regime. Here, spectral oscillating...

Abstract Thin‐disk lasers (TDLs) are best known for their high‐power continuous‐wave industrial applications. Nonetheless, the thin‐disk geometry is also highly attractive ultrafast laser oscillators. The short propagation distance and large beam diameter inside gain crystal allows very low induced nonlinearity, dispersion, extreme peak powers cavity. path toward TDL oscillators directly delivering high average power at pulse duration required many scientific applications has, however, been...

Resonant enhancement inside an optical cavity has been a wide-spread approach to increase efficiency of nonlinear conversion processes while reducing the demands on driving laser power. This concept particularly important for high harmonic generation XUV sources, where passive femtosecond cavities allowed significant in repetition rates required applications photoelectron spectroscopy, frequency comb including recent endeavor thorium nuclear clock development. In addition cavities, it shown...

Free-running dual-comb systems based on a single laser cavity are an attractive next generation technology for wide variety of applications. The high average power achievable by thin-disk (TDL) oscillators make this especially spectroscopy and sensing applications in the molecular fingerprint region enabled nonlinear frequency conversion. However, noise levels TDL oscillators, e.g., induced turbulent water-cooling disk, severe challenge spectroscopic In contribution, we confirm first time...

We demonstrate that Kerr lens modelocking is well-suited for operating an ultrafast thin-disk laser with intra-oscillator high harmonic generation (HHG) in the 100-fs pulse duration regime. Exploiting nearly full emission bandwidth of gain material Yb:YAG, we generate 105-fs pulses intracavity peak power 365 MW and average 470 W. drive HHG argon a intensity ∼7⋅10 13 W/cm 2 at repetition rate 11 MHz. Extreme-ultraviolet (XUV) light generated up to 31 st order (H31) 37 eV, ∼0.4 µW H25 30 eV....

We demonstrate an efficient 102-MW peak power, 103-W average Kerr-lens mode-locked thin-disk laser (TDL) oscillator generating 52-fs pulses at 17.1-MHz repetition rate. The TDL is based on Yb:YAG disk and operates in the strongly self-phase-modulation (SPM) broadened regime. In this regime, spectral bandwidth of oscillating pulse exceeds available gain by additional frequency components via SPM Kerr medium inside cavity. At optical-to-optical efficiency 26%, our delivers a more than six...

Morphing refers to the smooth transition from a specific shape into another one, in which initial and final shapes can be significantly different. A typical illustration is turn cube sphere by continuous change of curvatures. Here, we demonstrate process laser-induced morphing, driven surface tension thermally-controlled viscosity. As proof-of-concept, 3D glass structures fabricated femtosecond laser other locally heating up structure with feedback-controlled CO2 laser. We further show that...

We investigate power-scaling of a Kerr lens mode-locked (KLM) Yb:Lu2O3 thin-disk laser (TDL) oscillator operating in the sub-100-fs pulse duration regime. Employing scheme with higher round-trip gain by increasing number passes through element, we increase average power factor two and optical-to-optical efficiency almost three compared to our previous mode-locking results. The generates pulses 95 fs at 21.1 W 47.9 MHz repetition rate. discuss cavity design for continuous-wave operation...

We demonstrate broadband THz generation driven by an ultrafast thin-disk laser (TDL) oscillator. By optical rectification of 50-fs pulses at 61 MHz repetition rate in a collinear geometry crystalline GaP, radiation with central frequency around 3.4 and spectrum extending from below 1 to nearly 7 are generated. realized spectroscopic characterization GaP crystal benchmark measurement the water-vapor absorption range. Sub-50-GHz resolution is achieved within 5 bandwidth. Our experiments show...

We experimentally demonstrate an efficient and broadband extreme-ultraviolet light (XUV) out-coupling mechanism of intra-cavity generated high harmonics. The is based on a coated grazing-incidence plate (GIP), which utilizes the enhanced reflectivity s-polarized in comparison to p-polarized for large angles incidence (AoI). design produce 60°-AoI GIP, tailored specifically demands inside sub-50-fs Kerr-lens mode-locked Yb:YAG thin-disk laser oscillator harmonic generation (HHG) driven at...

We demonstrate broadband high-power terahertz (THz) generation at megahertz repetition rates by optical rectification in GaP driven an ultrafast Yb-based thin-disk laser (TDL) oscillator. investigate the influence of pulse duration range 50–220 fs and thickness crystal on THz generation. Optimization these parameters with respect to broadest spectral bandwidth yields a gap-less spectrum extending nearly 7 THz. further tailor driving for highest average power, demonstrating 0.3 mW radiation 5...

The paper presents application of dielectrophoresis for manipulation a microparticle in liquid medium above planar surface. force on the is exerted by non-uniform AC electric field. field generated set micro-electrodes patterned surface and connected to multi-channel voltage waveform generator. An novel yet simple control approach based changing phase delays among voltages electrodes introduced together with description an efficient hardware implementation. Laboratory experiments 250-micron...

We demonstrate broadband and powerful terahertz (THz) generation at megahertz repetition rate based on intra-oscillator optical rectification (OR) in gallium phosphide (GaP). By placing the nonlinear crystal directly inside cavity of a Kerr-lens mode-locked ultrafast diode-pumped solid-state laser (DPSSL) oscillator, we compact single-stage THz source. Using only 7 W diode-pump power, drive OR GaP with 22 average power ∼80 MHz rate. In first configuration, using 0.3-mm-thick 105 fs driving...

Resonant enhancement inside an optical cavity has been a wide-spread approach to increase efficiency of nonlinear conversion processes while reducing the demands on driving laser power. This concept particularly important for high harmonic generation XUV sources, where passive femtosecond cavities allowed significant in repetition rates required applications photoelectron spectroscopy, frequency comb including recent endeavor thorium nuclear clock development. In addition cavities, it shown...

Resonant enhancement inside an optical cavity has been a wide-spread approach to increase efficiency of nonlinear conversion processes while reducing the demands on driving laser power. This concept particularly important for high harmonic generation XUV sources, where passive femtosecond cavities allowed significant in repetition rates required applications photoelectron spectroscopy, frequency comb including recent endeavor thorium nuclear clock development. In addition cavities, it shown...

Ytterbium (Yb)-doped materials are an excellent choice for efficient and powerful ultrafast lasers. They exhibit favorable emission properties, which include a low quantum defect compatibility with cost-effective high-power pump diodes. While being strongly beneficial efficiency, the is challenge operation in few-cycle regime. In standard collinear pumping scheme, optical light passes dichroic mirror, whose spectral transmission dispersion properties can substantially perturbate oscillating...

We present a multi-mode diode-pumped Yb:CALGO laser oscillator based on cross-polarization pumping. Using this method, we demonstrate 22-fs pulses at 0.3 W, which is the shortest duration for any Yb- bulk utilizing multimode-diode

We present the first dual-comb thin-disk laser based on polarization splitting. It generates 6-W and 8-W outputs of 240-fs pulses with adjustable repetition rate. investigate noise properties demonstrate a proof-of-principle spectroscopy experiment.

We demonstrate a Kerr lens mode-locked thin-disk laser oscillator operating with 95-fs pulses at 21.1 W of average power. This is the highest power achieved by any in sub-100-fs regime.

We develop and implement a coated grazing-incidence-plate for broadband efficient XUV-out-coupling of intra-cavity generated high-harmonics. Moreover, we power-scale our thin-disk laser reach with 2-GW the highest peak-power any ultrafast oscillator.

We demonstrate efficient short-pulse generation from Yb:YAG in the regime of strong intracavity self-phase-modulation. reach 102-MW, 52-fs pulses at 103-W average-power with 26% optical-to-optical efficiency, presenting highest peak-power any ultrafast laser oscillator.

Operating in a regime of strong self-phase-modulation, 84-fs pulses are generated with 42-MW peak power and 12% efficiency from Yb:YAG. We demonstrate 3x higher average than any previous sub-100-fs laser oscillator.

High-power laser oscillators in the sub-100-fs pulse duration regime at megahertz repetition rates are a compact and reliable alternative to multi-stage amplifier systems. Sub-100-fs Ti:sapphire bulk have been working horse ultrafast science, but up nowadays they limited average power 3.5 W [ Fig. 1a) ]. Yb-doped gain materials better suited for high-power operation thanks their lower quantum defect. Yb-based already reached 12.5 W. However, further power-scaling geometry is strongly by...