Fiber lasers are rapidly gaining market shares for industrial applications due to compactness, high electrical-to-optical efficiency, high beam quality and low running cost. However, for directed energy weapons, fiber lasers have until now been unable to meet the requirements of military, where power levels around 100 kW are aimed for through combining of multiple, high beam quality lasers. The...

Based on spectral beam combining we obtain 16 W of output power, combining two 1063 nm DBR-tapered diode lasers. The spectral separation within the combined beam can be used for subsequent sum-frequency generation. OCIS codes: (140.2020) Diode lasers; (140.3298) Laser beam combining; (190.2620) Harmonic generation and mixing

We present a detailed study of the performance and cost issues related to the selection of either a 180° hybrid or a simple transformer for use as the primary power combining element for future LWA active-baluns. Noise figure, 1 dB compression point, IP2, IP3, Gain and VSWR measurements have been performed on two balun prototypes in order to do a side-by-side performance comparison. The prototy...

In this paper, closed-form expressions for the capacities per unit bandwidth for generalized Rician fading channels are derived for power and rate adaptation, constant transmit power, channel inversion with fixed rate, and truncated channel inversion adaptation policies. The closed-form solutions are derived for the single antenna reception (without diversity combining) and maximal-ratio combin...

A single-stage 24 GHz triple stacked power amplifier using 0.13 μm CMOS process is demonstrated. To Compare with parallel current combining method, series voltage combining method using a stacked amplifier architecture can realize a large output voltage swing from the top transistor without exceeding the transistor breakdown voltage limitations. However, at high frequencies, parasitic capacitan...

The Optimal Power Flow (OPF) is one of the most important issues in the power systems. Due to the complexity and discontinuity of some parameters of power systems, the classic mathematical methods are not proper for this problem. In this paper, the objective function of OPF is formulated to minimize the power losses of transmission grid and the cost of energy generation and improve the voltage ...

The most outstanding chemical findings, so far reported, in patients suffering from eclampsia are the decreased COz-combining power and the increased uric and lactic acids in the blood. The COz-combining power is often in the neighborhood of 20 volumes per cent, and it is not unusual to observe uric acid values above 10 mg. and lactic acid above 100 mg. per 100 cc. of blood (l-3). The hydrogen ...

This article exhibits the sizing, modelling, and characterization of a power supply (output 3.3 V, 200 mA max, 11 days full autonomy) dedicated to powering wireless sensor node without battery but usable as simply with battery. system is modular for various light levels (indoor outdoor). It easily integrable into node, using only commercial circuits. The choices photovoltaic surface (amorphous ...