Abstract The funerary slab of Agate , daughter an Ostrogoth comes dated to 512 AD, shows a hitherto unnoticed tabula lusoria or symbolic representation in the blank space below inscription. pattern, used for game Nine men’s morris, is accurately incised, and not hastily scratched, central visible position. Interesting questions arise: pattern board? Is it precedent, coeval posterior inscription...

ADIFFERENCE has been observed in certain instances between the onset of QRS in intracavitary and surface limb leads. Simultaneous tracings demonstrate that when premature ventricular depolarization exists the early rapid growth in magnitude of potential recorded by intracavitary leads may be nearly or totally inapparent in surface leads. Following premature depolarization changes occur in intra...

The role of rotational alignment during grating writing is comprehensively examined by the measurement of core luminescence from a Ge-doped 12 ring photonic crystal fibre, computer simulation of transmission and, definitively, by inscription of gratings at three angles– 0°, 30° and the optimum luminescent angle for this fibre, 21.5°. All experimental results were in accordance with each other a...

In Sir Arthur Conan Doyle’s A Study in Scarlet, Sherlock Holmes and his companion Dr John Watson find themselves at the scene of a homicide: a man’s body has been discovered in an abandoned house, with the word RACHE (German for revenge) written in blood on a nearby wall. Holmes reads footprints in the dust, scrutinises little heaps of tobacco ash with his magnifying glass, and takes a close lo...

We will demonstrate a new technique to discriminate the temperature and strain effects using a single fiber Bragg grating (FBG). The birefringence is typically induced during FBG inscription, and it is manifested as polarization-dependent loss (PDL), and it is defined as the maximum change in the transmitted power for polarizations. Two independent measurements of the resonance wavelength shift...

We report a Cr:ZnSe channel waveguide laser operating at 2486 nm. A maximum power output of 285 mW is achieved and slope efficiencies as high as 45% are demonstrated. Ultrafast laser inscription is used to fabricate the depressed cladding waveguide in a polycrystalline Cr:ZnSe sample. Waveguide structures are proposed as a compact and robust solution to the thermal lensing problem that has so f...

We review femtosecond laser-direct write inscription of guided wave structures in bulk glass and discuss our recent demonstrations of a range of 2and 3-D photonic devices using this technique. Figure 1: Schematic of the perpendicular writing method used to inscribe waveguides in bulk glass. The components are A: 150fs Ti:Sapphire laser, B: in-line camera, C: variable slit for beam shaping, D: 2...