https://doi.org/10.1051/epjap/2015150126
The second-harmonic generation in a dissipative and dispersion layered structure*
1
Optics & Laser Group, Department of Engineering Physics, Islamic Azad University, Bonab Branch, 55518-134, Iran
2
Department of Physics, Azarbaijan Shahid Madani University, 51665-163
Tabriz, Iran
3
College of Arts & Sciences, Department of Chemistry & Earth Sciences, Qatar University, 2713
Doha, Qatar
a e-mail: h.masalehdan@gmail.com
Received:
26
February
2015
Revised:
29
July
2015
Accepted:
18
August
2015
Published online:
11
September
2015
Conversion efficiency of second-harmonic generation (SHG) in a multicrystal structure arrangement, under linearly absorption of interacting waves was analytically investigated. Different linear absorption and nonlinear interaction coefficients were considered for both of the fundamental and the second harmonic waves in cascade layers. The intensity-constant approximation on fundamental wave radiation was applied in calculations. Behavior of conversion efficiency with interaction coherence length of fundamental wave, phase miss-matching and ratio of linear absorption coefficients were graphically illustrated. The results are shown that in multicrystal structure scheme, the conversion efficiency can be tuned by the interaction coherent length and it is possible to compensate the phase differences induced in the previous layers. The phase compensation between the layers is the physical reason of efficiency improvement.
© EDP Sciences, 2015
