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Photopolymerization
...with almost no constraint on geometry or wall thickness. FemtoLux 3 suits this work. It is a compact, low-power fiber laser whose 300 fs pulses are short enough to drive two-photon absorption, so solidification stays inside the focal volume. With 3 W of average power and a repetition rate up...
Femtosecond processing of GaAs in ambient air and water environment
Processing semiconductor materials such as Gallium Arsenide (GaAs) using ultrashort laser pulses presents unique challenges due to heat accumulation and the need for precise, high-quality modifications. Femtosecond lasers are particularly well-suited for this task, offering minimal thermal impact and high precision. In a comprehensive study, the ablation of GaAs was...
Femtosecond laser formation of grooves in ceramic
...materials like ceramics with high quality and accuracy. FemtoLux was tested in the initial step of ceramic scribing: groove formation. A study compared scribing speeds and quality at the 1030, 515, and 343 nm wavelengths. To estimate the influence of shorter wavelengths, 3 mm long and 50 µm deep grooves...
Heat-sensitive organic material processing with femtosecond laser
...used to process thin organic materials for medical applications. These materials are particularly susceptible to thermal accumulation. By utilizing the short pulse duration of 350 fs and combining it with high scanning speeds, the cutting of these thin organic materials was achieved without inducing significant thermal effects. Cutting speeds of...
SHG spectroscopy / microscopy
...second harmonic generation (SHG) microscope. Relatively high laser pulse energy at a medium pulse repetition frequency allowed for a faster single image acquisition compared to that using laser-scanning. It was also possible to acquire images of relatively large sample areas, which paved the way for the rapid imaging of macroscopic...
Gas-phase ion luminescence spectroscopy
...acceptor on transition energies. Absorption was identified from ion dissociation (action spectroscopy) using a homebuilt setup (sector mass spectrometer combined with pulsed laser). We find that the absorption is broad in the visible region for all four NPs with significant vibronic features. The lowest energy peak is at 601 ±...
Z-scan
In nonlinear optics, z-scan technique is used to measure the non-linear index n2 (Kerr nonlinearity) and the non-linear absorption coefficient Δα via the “closed” and “open” methods to measure both real and imaginary components of the nonlinear refractive index. For measuring the real part of the nonlinear refractive index, the...
Ultra-high intensity
...intensity laser applications span a number of scientific disciplines, such as plasma physics and fusion research, atomic molecular & optical physics, femtosecond chemistry, astrophysics, high energy physics, materials science, biology, and medicine. OPCPA seeding A compact femtosecond wavelength-tunable OPCPA system can be built by using a novel front-end, which incorporates...