Total-internal-reflection based optical rotation quasi-phase-matching technique realized in a biaxial electro-optic chiral material to generate highly efficient second harmonic

2021 ◽  
Author(s):  
MOUMITA SAHA ◽  
SUMITA DEB
Keyword(s):  
Total Internal Reflection ◽  
Second Harmonic ◽  
Optical Rotation ◽  
Internal Reflection ◽  
Phase Matching ◽  
Highly Efficient ◽  
Electro Optic ◽  
Quasi Phase Matching ◽  
Matching Technique

Broadband fractional total internal reflection quasi phase matching based second harmonic generation in reverse tapered isotropic semiconductor considering the effect of nonlinear reflection

2015 ◽  
Vol 24 (04) ◽  
pp. 1550041 ◽  
Author(s):  
Minakshi Deb Barma ◽  
Sumita Deb ◽  
Ardhendu Saha
Keyword(s):  
Total Internal Reflection ◽  
Second Harmonic ◽  
Infrared Region ◽  
Internal Reflection ◽  
Nonlinear Material ◽  
Phase Matching ◽  
Destructive Interference ◽  
Harmonic Generator ◽  
Nonlinear Reflection ◽  
Quasi Phase Matching

This paper analyzes a highly efficient broadband second-harmonic generator in the mid infrared region using an isotropic reverse tapered semiconductor slab configuration, using fractional total internal reflection quasi-phase matching technique. A computer aided simulation has been performed using ZnTe as the nonlinear material which provides an extremely high conversion efficiency of 22.94% with a 3[Formula: see text]dB bandwidth of 200[Formula: see text]nm. Effect of varying the slab dimensions on the performance parameters has also been analyzed. Finally, the catastrophic effect caused by destructive interference due to nonlinear law of reflection has also been incorporated in the analysis thereby giving more accurate results.

Analysis of highly efficient DFG in an electro-optic material exhibiting polarization rotation using TIR-based ORQPM technique

2021 ◽  
Author(s):  
Moumita Saha ◽  
Sumita Deb
Keyword(s):  
Conversion Efficiency ◽  
Optical Rotation ◽  
Difference Frequency Generation ◽  
Guided Wave ◽  
Phase Matching ◽  
Highly Efficient ◽  
Quasi Phase Matching ◽  
Rectangular Slab ◽  
The Impact ◽  
Matching Techniques

This paper is a numeric-analytical work for highly efficient difference-frequency generation (DFG) by the integrated effect of total-internal-reflection-based optical rotation quasi-phase-matching (ORQPM) and nonresonant quasi-phase-matching techniques in a thin yttrium oxide-coated rectangular slab of magnesium oxide-doped lithium niobate crystal. The conversion efficiency of 37.2% has been obtained by ray-optics analysis, corresponding to an idler wavelength of 1570[Formula: see text]nm. Moreover, the guided-wave approach has also been analyzed for more accurate and realistic outcomes, yielding a peak conversion efficiency of 1.64%. The impact of the influencing factors like surface roughness, absorption, and nonlinear law of reflection has also been incorporated in the computer-aided simulation for providing a pragmatic understanding of the whole study.

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