Micromarkers with five photoluminescence colors were developed as tracers for shadowing pursuits. The markers are colorless powders with particle diameters of several tens to several hundreds of micrometers, prepared using a cryogenic sample crusher. They were visualized using red, green, yellow, magenta or cyan photoluminescence under ultraviolet light at approximately 365 nm. The markers were...

Ytterbium-doped fiber lasers are making impressive leaps in power production. Yet in spite of fibers large surface area to volume ratio which is beneficial for cooling, such power inevitably leads to high core temperatures that in turn affect the laser performance. In this letter, the temperature effects on the emission and fluorescence lifetime of ytterbium doped optical fibers are investigate...

Wc report on a study to dctcrminc the efllciency of various buffer gases in quenching the population trapping states of laser excited ytterbium ions. 'The ions were confined in an rf/dc hybrid trap, and their 2 S 1 / 2 H 2 P 3 / 2 transition was excited with 329 nm ]ascr light. Buflcr gsscs used include 11 2 , N2, C02, Ar, and llc at several diflcrcnt pressure rcgitncs. Wc have identified N 2 t...

A tunable comb filter based on a fiber loop mirror setup, which incorporates a piece of pumped erbium-ytterbium co-doped polarization maintaining fiber, is newly presented. It is accomplished by controlling the pump power or adjusting a polarization controller in the loop mirror, which results from the fact that the effective birefringence of the erbium-ytterbium co-doped polarization maintaini...

New ytterbium (III) compounds with β-diketones (2,7-dimethyl-octene-1-dione-3,5 and 2,6-dimethylheptene-1-dione-3,5) their derivatives phenanthroline have been synthesized. The composition chemical structure of the obtained complexes determined by several Phy­sico-chemical investigations. It has shown, that Yb ion coordinates three ligand molecules coordination sphere is supplemented two mole­c...

A Fiber Bragg grating of 369 nm pitch was inscribed in a germanium-free double-clad ytterbium doped silica fiber using a femto-second pulse train at 400 nm wavelength and a phase mask. The photo-induced refractive index modulation of higher than 4 x 10(-3) was obtained and the accompanying photo-induced losses were subsequently removed by thermal annealing, resulting in a low loss (<0.1 dB), st...

An unprecedented combination of isotopic enrichment and magnetic dilution approaches for a prolate ytterbium(III)-based complex was performed. It results in the appearance first observations nuclear spin effect on both quantum tunneling magnetization slow relaxation an ytterbium under zero applied field.

We observed high-resolution photoassociation spectra of laser-cooled ytterbium (Yb) atoms in the spin-forbidden 1S0 - 3P1 intercombination line. The rovibrational levels in the 0u+ state were measured for red detunings of the photoassociation laser ranging from 2.9 MHz to 1.97 GHz with respect to the atomic resonance. The rotational splitting of the vibrational levels near the dissociation limi...

Z. Naturforsch. 56 b, 697-703 (2001); received April 5, 2001 Multianvil, High-Pressure Synthesis, Borates /3-Ytterbium borate (ö-YbBOi) was synthesized under high-pressure in a Walker-type mul­ tianvil apparatus at 2.2 GPa and 1400 °C. The title-compound crystallizes in the trigonal calcite structure, space group R3c. Single crystal X-ray data yielded a = 492.1(2), c = 1630.5(9) pm, wR2 = 0.034...

36 LLE Review, Volume 97 Fiber laser and amplifier development in the wavelength region near 1 μm has experienced significant progress owing to the exceptional efficiency and gain bandwidth of ytterbiumdoped fibers.1–5 In fact, both ytterbium fiber lasers and amplifiers are becoming more attractive than their bulk counterparts due to their confined spatial mode, impressive bandwidth, good pump ...