scholarly journals New Sellmeier and Thermo-Optic Dispersion Formulas for AgGaS2

Crystals ◽  
2019 ◽  
Vol 9 (3) ◽  
pp. 129
Author(s):  
Kiyoshi Kato ◽  
Takayuki Okamoto ◽  
Sergey Grechin ◽  
Nobuhiro Umemura
Keyword(s):  
Second Harmonic ◽  
Diode Lasers ◽  
Difference Frequency Generation ◽  
Phase Matching ◽  
Temperature Dependent ◽  
Periodically Poled ◽  
Sum Frequency ◽  
Optical Parametric ◽  
Good Reproduction ◽  
Frequency Generation

This paper reports on the new Sellmeier and thermo-optic dispersion formulas that provide a good reproduction of the temperature-dependent phase-matching conditions for second-harmonic generation (SHG) and sum-frequency generation (SFG) of a CO2 laser and a Nd:YAG laser-pumped KTiOPO4 (KTP) optical parametric oscillator (OPO) in the 0.8859–10.5910 μm range as well as those for difference-frequency generation (DFG) between the two diode lasers in the 4.9–6.5 μm range and DFG between the two periodically poled LiNbO3 (PPLN) OPOs in the 5–12 μm range thus far reported in the literature.

TERAHERTZ OPTICAL RECTIFICATION

1995 ◽  
Vol 04 (02) ◽  
pp. 459-495 ◽  
Author(s):  
Y. H. JIN ◽  
X.-C. ZHANG
Keyword(s):  
Second Harmonic ◽  
Difference Frequency Generation ◽  
Nonlinear Process ◽  
Second Order ◽  
Optical Rectification ◽  
Temperature Dependent ◽  
Optical Absorption Band ◽  
Sum Frequency ◽  
Electro Optic ◽  
Frequency Generation

We present experimental measurements of Terahertz optical rectification in electro-optic crystals. The measured data was compared with a simple theoretical analysis (anharmonic oscillator model). We also measured Terahertz-bandwidth subpicosecond electromagnetic radiation via nearly-degenerate difference-frequency generation in electrooptic materials. The variation in Terahertz emission with crystal orientation demonstrated that the generation of Terahertz radiation via optical rectification involves a bulk second-order nonlinear process. We studied Terahertz optical rectification from zincblende crystals as the incident photon energy was tuned across the semiconductor optical absorption band-edge (resonant excitation). We also present the measurement of temperature-dependent Terahertz optical rectification. A comparison between the two second-order nonlinear processes, sum-frequency generation (second-harmonic generation) and different-frequency generation (optical rectification) is presented.

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