CARMENES in SPIE 2014. Building a fiber link for CARMENES
... planets within the habitable zones of 300 low-mass stars. The advantage of CARMENES is that visual as well as near infrared spectra can be taken at the same time, which helps to distinguish wavelength dependent stellar activity effects from real planetary signals. In order to detect earth-size plane ...
... planets within the habitable zones of 300 low-mass stars. The advantage of CARMENES is that visual as well as near infrared spectra can be taken at the same time, which helps to distinguish wavelength dependent stellar activity effects from real planetary signals. In order to detect earth-size plane ...
Ultrafast Acoustic Phonon Ballistics in Semiconductor Heterostructures
... and the emitted optic phonons which absorb the bulk of the excess electron energy. Detailed studies have been driven by new theories which cope with the many-body electron-electron and electron-phonon interactions, and by growing numbers of technological applications. Recently developed ultrafast la ...
... and the emitted optic phonons which absorb the bulk of the excess electron energy. Detailed studies have been driven by new theories which cope with the many-body electron-electron and electron-phonon interactions, and by growing numbers of technological applications. Recently developed ultrafast la ...
Transverse Modes in Large-Mode-Area Fibers
... experimental results of the parameters obtained by the modal decomposition method agree well with the nominal or measured values. The thesis also investigates helical-core fibers. An improved semi-analytic bend-loss model is derived that allows for the propagation of radiated fields outside the plan ...
... experimental results of the parameters obtained by the modal decomposition method agree well with the nominal or measured values. The thesis also investigates helical-core fibers. An improved semi-analytic bend-loss model is derived that allows for the propagation of radiated fields outside the plan ...
Photonic Crystals - Materials Computation Center
... “ If only were possible to make materials in which electromagnetically waves cannot propagate at certain frequencies, all kinds of almost-magical things would happen” Sir John Maddox, Nature (1990) ...
... “ If only were possible to make materials in which electromagnetically waves cannot propagate at certain frequencies, all kinds of almost-magical things would happen” Sir John Maddox, Nature (1990) ...
workshop on laser-matter interaction 2010
... 30 minutes tutorials, forty one 20 minutes talks and sixteen posters. We tried to mostly follow the participants’ wishes, but we were also concerned with keeping a certain coherence between all the topics addressed within each session. Tutorials have been selected in order to emphasize “hot topics”, ...
... 30 minutes tutorials, forty one 20 minutes talks and sixteen posters. We tried to mostly follow the participants’ wishes, but we were also concerned with keeping a certain coherence between all the topics addressed within each session. Tutorials have been selected in order to emphasize “hot topics”, ...
Optical amplifier
An optical amplifier is a device that amplifies an optical signal directly, without the need to first convert it to an electrical signal. An optical amplifier may be thought of as a laser without an optical cavity, or one in which feedback from the cavity is suppressed. Optical amplifiers are important in optical communication and laser physics.There are several different physical mechanisms that can be used to amplify a light signal, which correspond to the major types of optical amplifiers. In doped fibre amplifiers and bulk lasers, stimulated emission in the amplifier's gain medium causes amplification of incoming light. In semiconductor optical amplifiers (SOAs), electron-hole recombination occurs. In Raman amplifiers, Raman scattering of incoming light with phonons in the lattice of the gain medium produces photons coherent with the incoming photons. Parametric amplifiers use parametric amplification.