We report the mode-locked operation of two new Yb-doped oxyorthosilicates, Y2SiO5 (YSO) and Lu2SiO5 (LSO), that are longitudinally diode pumped. Yb:YSO supplied pulses as short as 122 fs with 410 mW of output power at 1041 nm. More than 2.6 W of average output power, for pulse durations of 198 fs at 1044 nm and 260 fs at 1059 nm for Yb:YSO and Yb:LSO, respectively, were provided. These are, to ...

"Pumping" of phonons by a dynamic magnetization promises to extend the range and functionality magnonic devices. We explore impact phonon pumping on room-temperature ferromagnetic resonance (FMR) spectra bilayers thin yttrium iron garnet (YIG) films thick gadolinium gallium substrates over wide frequency range. At low frequencies Kittel mode hybridizes coherently with standing ultrasound waves ...

The interest in the dynamic behavior of lasers and its analogy to phase transition phenomenon have been renewed over recent years mainly due to experimental realization of microlasers [1]. The reason for this is a possibility of lowering of the threshold pump needed to start the lasing process. The value of the threshold pump is mostly determined by the fraction β of spontaneously emitted photo...

Some recent experimental observations of highly dynamic crack growth events in thick unidirectional graphite fiber-reinforced epoxy matrix composite plates are presented. The composite plates were symmetrically (mode-I) and asymmetrically (mode-II) loaded in a one-point bend configuration with an edge pre-notch machined in the fiber direction. The lateral shearing interferometric technique of c...

In the present work, the interaction of Rayleigh waves with a delamination in a fiber reinforced composite plate was analyzed. Rayleigh waves, upon interacting with delamination mode, convert into Lamb waves in the delamination zone. These guided Lamb modes have the capability to mode convert back into Rayleigh modes when they interact with the edge of the delamination. A unidirectional glass/e...

Optical lattice clock systems with ultra-cold strontium-88 atoms have been used to demonstrate superradiant lasing and magnetic field-controlled optical transmission. We explain these phenomena theoretically a rigorous model for three-level coupled single cavity mode. identify class of dark atom-light dressed states which become accessible due mixing bright in the presence field. predict that s...

We report a bright source of polarization-entangled photon pairs using spontaneous parametric down-conversion (SPDC) in a 10 mm long type-II PPKTP crystal pumped by a broadband multi-mode diode laser with the coherence length of 330 μm. Ordinarily, the huge mismatch between the pump coherence length and the PPKTP length would degrade the polarization entanglement completely. By employing the un...

We show here that dynamic-mode cantilever sensors enable acoustofluidic fluid mixing and trapping of suspended particles as well as the rapid manipulation and release of trapped micro-particles via mode switching in liquid. Resonant modes of piezoelectric cantilever sensors over the 0 to 8 MHz frequency range are investigated. Sensor impedance response, flow visualization studies using dye and ...

The unidirectional grating-assisted codirectional coupler (U-GACC) has recently been proposed. This unique structure permits irreversible coupling between orthogonal waveguide eigenmodes by means of simultaneous modulation of both the real and imaginary parts of the refractive index in the coupling region. Analysis of the U-GACC has until now relied on coupled mode theory, which can be restrict...

Radiated power fractions above 90% have been achieved in DIII–D using impurity feedback control. Heat flux reductions up to a factor of 6 and confinement enhancements of 1.6 × ITER-89P L–mode scaling have been obtained with a radiated power fraction above 70%. When the outer separatrix strike point was positioned for pumping with the DIII–D cryopump, ELMing H–mode (Type III ELMs) was triggered ...