The degradation of second-harmonic generation in quasi-phase-matching waveguides, when random errors occur in the domain boundary position and when the effective index varies along the waveguide, is studied theoretically. Two models for random errors are used, one assuming independent shifts of the ...
The effect of varying effective index and random deviations of domain boundary on sum frequency generation (SFG) in quasi-phase-matching waveguides are analyzed and analytical expressions of the conversion efficiency are provided for the first time to our knowledge. By simplifying the coupled equations...
Influence of stochastic deviations of domain boundary and varying effective index on the conversion efficiency of difference frequency mixing (DFM) in quasi-phase-matching waveguides are analyzed. By simplifying the coupled equations of DFM in waveguide according to the actual situation, we provide ...
quasi-phase-matching (QPM)sum frequency generation (SFG)The effect of varying effective index and random deviations of domain boundary on sum frequency generation (SFG) in quasi-phase-matching waveguides are analyzed and analytical expressions of the conversion efficiency are provided for the first ...
In this paper, we give a conjecture that the reformulated version of the Atiyah-Patodi-Singer index can be given simply from the Berry phase associated with domain wall Dirac operators when adiabatic approximation is valid. We explicitly confirm this conjecture for a special case in two ...
Finally, a time-domain approach based on state-equations has been investigated and suggested that this approach is more suitable in tackling discrete problems efficiently.M. R. AbroJournal of Engineering and Applied Sciences
TIME-DOMAIN BASED ACTIVE COMPENSATION STRATEGIES UNDER NONSINUSOIDAL CONDITIONS IN THREE-PHASE THREE-WIRE SYSTEMSThis paper deals with the peculiarities involved by the operation under nonsinusoidal voltage conditions on the generation of the reference compensating current in three-phase three-wire shunt ...