Parametric investigation of the isotope shift in odd configurations of Ne I

Isotope shift measurements were performed on 33 transitions of Ne I by means of optogalvanic and intermodulated optogalvanic spectroscopy as well as saturation absorption spectroscopy. Using a large number of line isotope shift values obtained from both literature and our measurements, the level isotope shifts were calculated with improved concistency, Fine structure calculations were performed in odd configurations in order to obtain isotope shift parameters by means of the parametric method, 2p(5)3s: g(1) = -1077.5(7), z(2p) = 15.3(3), 2p(5)5s: g(1) = -104(26), z(2p) = 14(6), 2p(5)4d: g(1) = -42(6), z(2p) = 17(3)

Polymeric MOEMS variable optical attenuator

In this letter, we take advantage of the high coefficient of thermal expansion (CTE) of a chemically amplified, epoxy-based negative polymer (SU-8) to define a low-power consumption polymeric variable optical attenuator that combines the working principles of microoptoelectromechanical systems and photonic light-wave circuits. The SU-8 symmetric structure comprises a seismic mass and four mechanical beams. Three multimode waveguides are defined on this structure: two of them are located on the frame and the third one in the middle of the seismic mass. Aluminum is used as a heater electrode extending over two of the mechanical beams and part of the seismic mass. When a dc voltage is applied, the mechanical beams bend, resulting in a misalignment between the waveguides. Experimental results have shown a power consumption of 12 mW at 20 dB with a working wavelength of 633 nm emitted from a light-emitting diode

La Lanterne : journal politique quotidien

03 août 18951895/08/03 (N929,A12)