nonreciprocal devices for integrated optics

recent development of waveguide nonreciprocal devices, i.e., isolator and circulator, is reviewed. two major difficulties exist for their fabrication. first, form birefringence must be overcome to obtain high te-tm mode conversion efficiency. secondly, both of input and output light must be either te or tm mode. a variety of methods and d..

measurement facility at the georgia tech research institute

the georgia tech research institute has implemented a new 10*12 foot, planar near field range which is based on an accurate mechanical scanner. the system includes provision for active probe position correction to maintain planarity to +or-0.002 inches. the rf instrumentation is based on the hewlett packard 9510b network analyzer which pr..

a condenser-boiler for a binary rankine cycle space power system

a theoretical design is described for the condenser/boiler of a space-based dynamic power system. the base system is a binary rankine cycle with mercury and toluene as the working fluids. the system output is 75 kwe (kilowatt electric) with a combined efficiency of 41.4 percent . the toluene flow is supercritical to avoid two-phase flow d..

hemodynamic changes in pregnancy and pregnancy complicated by hypertension

pregnancy-induced hypertension is a common disease with potential for significant multiorgan involvement. the dramatic cardiovascular changes of normal pregnancy are markedly altered by the development of pregnancy-induced hypertension. the ability to recognize and manage these changes often effects profoundly both maternal and fetal outc..

a 10 a automotive high-side switch

a 10-a high-side driver device that has on-chip intelligence to provide self-protection and diagnostics for an automotive antilock braking system application is described. the device is fabricated by means of a multiepitaxial bipolar process that combines the ruggedness of discrete power transistors with junction-isolated ic circuits. the..

stability of isolated bacterial and photosystem ii reaction center complexes on ag electrode surfaces. a surface-enhanced resonance raman study

surface-enhanced resonance raman scattering (serrs) spectra from isolated rhodospirillum rubrum bacterial reaction center complexes indicate that the carotenoid, spirilloxanthin, resides in the cis conformation, while serrs spectra from isolated photosystem ii (psii) d1-d2-cytochrome b-559 reaction center complexes show that beta -caroten..

laser-induced fluorescence and fourier transform spectroscopy of tio' an improved description of the /sup 3/ delta ground state

laser-induced fluorescence spectra of the c/sup 3/ delta -x/sup 3/ delta and b/sup 3/ pi -x/sup 3/ delta transitions of tio have been recorded at high resolution by fourier transform spectroscopy. for the molecule production, a simple flame reaction device was used. this device was based on a titanium hollow cathode sputtering source used..

new primary ice-nucleation parametrizations in an explicit cloud model

two new primary ice-nucleation parameterizations are examined in the regional atmospheric modeling system (rams) cloud model via sensitivity tests on a wintertime precipitation event in the sierra nevada region. a model combining the effects of deposition and condensation-freezing nucleation is formulated based on data obtained from conti..

hdtv' a 140 mbit/s coded for 'contribution' quality coding

digitising the luminance and chrominance components of an hdtv signal results in a bit rate of about 1.2 gbit/s. for long-distance transmission an obvious goal is to reduce this bit rate by a factor of about 10 in order to fit into the current standard bit rate of 140 mbit/s. in order to maintain contribution quality for such bit-rate red..

singlet-triplet separations measured by phosphorus-31 nuclear magnetic resonance spectroscopy. applications to the molybdenum-molybdenum quadruple bond and to edge-sharing bioctahedral complexes

generally speaking, the separation in energy of a low-lying triplet state from a diamagnetic ground state has been estimated by measurements of the magnetic susceptibility of the solid compound over a broad temperature range (typically 5-300 k). the authors report an alternative way to obtain such data that is more convenient, sensitive, ..