Abstract A KrF discharge laser (248 nm) has been used to laser trigger, by volume preionization, a spark gap switch (38–65 kV, >10 kA, 100 ns pulse duration) filled with 20 different gas mixtures using various combinations of air, Ar, CH4, H2, He, N2 SF6, and Xe. A pulsed lase...
To explain the experimental characteristics of a laser Doppler velocimeter using the self-mixing effect of a semiconductor laser diode (LDV) with a rotating disc as a target, a theoretical analysis of a Doppler beat waveform was carried out, and its approximate solution was obtained by using the...
Optics & Laser TechnologyZhao S,Wang Q,Zhang X,et al.Laser Characteristics of a New Crystal Nd:Sr5(PO 4) 3F at 1.059μm.Opt.Laser Technol. 1996Zhao;S;Wang;Q;Zhang;X;et;al.Laser Characteristics of a New Crystal Nd:Sr5(PO 4) 3F at 1.059μm.OptLaser Technol.1996...
However, high power laser perforation is a complex process, which can be influenced by the factors of different rock types, rock deposition orientations, rock sizes, laser output powers, laser irradiation time etc. In particular, the harsh environment in oil and gas wells will greatly attenuate ...
The design of a pulse–periodic СО2 laser oscillator that operates at a high level of the specific energy deposition into a self-sustained discharge is described. The laser is intended for generating pulses with a high-density radiation flux in a laser-plasma generator of multiply charged ions...
We have studied the leakage current conduction mechanism of pulsed-laser-depositedSrBi2Nb2O9(SBN) thin films on platinized silicon substrates. The time-dependent dc leakage current densities of SBN thin films do not follow Curie–von Schweidler power law. Instead the contribution of conduction cur...
Effects of gamma-irradiation on the characteristics of a ruby laser An increase in the absorption cross section responsible for optical pumping of a ruby laser occurs as a result of γ-irradiation. As single crystal ruby is... VR Johnson,RW Grow - 《IEEE Journal of Quantum Electronics》 被引...
do not need two mirrors on both sidesof the active zone to form optical cavities. Rather, diffraction on the active region serves as a wavelength select component and provides feedback through one mirror.Because of its high output power and stability, this laser is primarily utilized forhigh ...
These requirements were seen as compatible with the idea of a disc on which an analogue video or audio signal could be stored in the form of dimples that were read by a laser that had been attached to a movable arm. Philips was not the only company that came up with such technical ...
of two convex lenses and a pinhole placed at their common focus. Nonetheless, the pinhole aperture should be less than a specific size to be able to efficiently clean off the rapidly growing spatial frequencies, thus the pinhole aperture in large laser systems has to bear higher intense laser ...