We reported a record high power (>250 mW) and compact near-infrared fiber-optic femtosecond Cherenkov radiation source and its new application on nonlinear light microscopy for the first time (to our best knowledge). The high power femtosecond Cherenkov radiation was generated by 1.03 μm femtosecond pulses from a portable diode-pumped laser and a photonic crystal fiber as a compact, flexible, a...

Fuel cell's system requires regulating circuit for voltage and current in order to control power in case of connecting to other generative devices or load. In this paper Fuel cell system and convertor, which is a multi-variable system, are controlled using sliding mode method. Use of weighting matrix in design procedure made it possible to regulate speed of control. Simulation results show the ...

input pump, which is much smaller than individual SOA polarization dependence. Secondly, the worst contrast ratio still yields -6.5 dB for an input contrast ratio 10 dB, which is still larger than the contrast ratio of the TE input for a single SOA. The residual 1.1-dB polarization dependence is attributed to the two SOAs not being perfect matched. Figure 3(a) shows the polarization dependence ...

Space nuclear reactor power system (SNRPS) is a priority technical solution to meet the future space requirement of high-power, low-mass, and long-life. The thermoelectric conversion subsystem key component SNRPS, which greatly affects performance, quality, volume SNRPS. Among all kinds proposed technologies, free-piston Stirling converter (FPSPC) has become preferred technology for small-scale...

A highly sensitive weak current detection circuit for implantable glucose monitoring is presented. The circuit consists of a current splitter, an integrator, a sampling/holding (S/H) circuit, and an 8-bit successive approximation register (SAR) analog-to-digital convertor (ADC). T-switches, source voltage shifting and correlated double sampling (CDS) technology are adopted to reduce the effects...