We discuss mode-locking of low-gain solid-state lasers using a semiconductor saturable Bragg reflector structure. This recently developed low-loss mode-locking device consists of a single quantum well which acts as a saturable absorber incorporated into a high-reflectivity Bragg mirror. Highly stable mode-locking in solid-state lasers results from an ultrafast transient reflectivity in the devi...

Abstract Highly transparent 0.5 and 1.0 at% Pr-doped Y 2 O 3 ceramics were fabricated by vacuum sintering plus hot isostatic pressing (HIP) treatment. The selection of suitable pre-sintering temperatures right microstructures before HIP was critical to obtain high density the final sintered bodies. well-densified had pore-free with an average grain size about 1 µm. It also found that charge sta...

One of the main issues involved during tunnel construction with tunnel boring machines is the tail gap grouting. This gap is between the external diameter of tunnel lining and the excavation boundary that is filled with high-pressure grouting materials. In this work, three different approaches of gap grouting modeling in the FLAC3D software are investigated with a special attention to the...

AIMS To provide new insights into characterising solid cell nests and gain information that might help distinguish between solid cell nests and C cells. METHODS Thyroid tissue specimens from patients who had undergone prophylactic thyroidectomy for familial medullary thyroid cancer were immunostained for calcitonin, carcinoembryonic antigen, and galectin 3. RESULTS Solid cell nests displaye...

For a solid lattice, we rederive the Continuous Spontaneous Localization (CSL) noise total energy gain of test mass starting from Lindblad formulation, and similar point geometry factor governing center gain. We then suggest that can be used as way to distinguish between low temperature cantilever motion saturation arising CSL noise, thermal leakage.

A new type of solid-state femtosecond amplifier is demonstrated that is based on quasi-phase-matched parametric amplification. Such gain media are different from conventional solid-state amplifiers in that their amplification bandwidths and pump and signal wavelengths can be engineered. Furthermore, high gain is characteristic of parametric amplification, permitting extraction of high energies ...