Owing to the discrete frequency spectrum of whispering gallery resonators (WGRs), resonance and phase-matching conditions for interacting waves in case second-harmonic generation (SHG) cannot generally be fulfilled simultaneously. To account this, we develop a model describing SHG WGRs with non-zero detunings at both pump frequencies. Our predicts strong distortions line shape resonances simila...

The electro-hydraulic servo pump control system (EHSPCS) is a volume that uses permanent magnet synchronous motor (PMSM) with fixed displacement to directly drive and the hydraulic cylinder. energy transmission law of very complicated due transformation electrical, mechanical as well other fields, qualitative analysis transfer efficiency difficult. Energy EHSPCS under different working conditio...

abstract: impeller trimming is a proper way to alter the performance of centrifugal pump with a constant speed so as to meet the demand on the specified flow rate and head in pumping systems. the affinity law accounting for the impeller trimming is the key relation to determine the pump performance with a trimmed impeller. there seems no experimental study dealing with such an affinity law for ...

We report an efficiency-enhanced mid-infrared generation via optical parametric down conversion. A tandem periodically-poled MgO-doped stoichiometric lithium tantalate crystal is used to realize on-chip generation and amplification of mid-infrared radiation inside an optical parametric oscillator cavity. We achieved 21.2% conversion efficiency (24% slope efficiency), which is among the highest ...

We theoretically analyze a high-efficiency single-frequency Brillouin all-fiber ring laser at 1.5 mm wavelength, taking pump depletion into account. The output pump and Stokes intensities are calculated as functions of the cavity coupling coefficient and of the input pump intensity. Lasing threshold and pump-to-Stokes conversion efficiency are predicted. Furthermore, we demonstrate good agreeme...

In this paper, the authors present hydraulic and electro-hydraulic simulations of circuits needed for ALARS (Automated Launch Recovery System). fact, is used to launch side-scan sonar into sea. First circuit has following devices: tank, filter, fixed displacement pump, check valve, 4/3- way valve with two buttons, throttle pressure relief hand lever tanks reservoir, filter double acting cylinde...

We demonstrate efficient single-photon detection at 1.55 microm by means of sum-frequency mixing with a strong pump at 1.064 microm in periodically poled lithium niobate followed by photon counting in the visible region. This scheme offers significant advantages over existing InGaAs photon counters: continuous-wave operation, higher detection efficiency, higher counting rates, and no afterpulsi...

Abstract—Electro-hydraulic power steering (EHPS) system for the fuel rate reduction and steering feel improvement is comprised of ECU including the logic which controls the steering system and BL DC motor and produces the best suited cornering force, BLDC motor, high pressure pump integrated module and basic oil-hydraulic circuit of the commercial HPS system. Electro-hydraulic system can be stu...

Recently, there has been a growing interest in using induced electro-osmosis to pump fluids in microfluidic devices. We show that induced electroosmosis can also be used to promote stirring and chaotic advection. To this end, we study theoretically a stirrer in which the flow patterns are alternated in time. We first analyze an idealized embodiment of the stirrer that admits a simple analytical...