scholarly journals Optical Properties of KTP Crystals and Their Potential for Terahertz Generation

Crystals ◽  
2018 ◽  
Vol 8 (8) ◽  
pp. 310 ◽  
Author(s):  
Alexander Mamrashev ◽  
Nazar Nikolaev ◽  
Valery Antsygin ◽  
Yury Andreev ◽  
Grigory Lanskii ◽  
...  
Keyword(s):  
Optical Properties ◽  
Second Harmonic ◽  
Difference Frequency Generation ◽  
Terahertz Wave ◽  
Optical Quality ◽  
Potassium Titanyl Phosphate ◽  
Phase Matching ◽  
Wide Range ◽  
Parametric Processes ◽  
Wave Conversion

High nonlinearity, wide transparency range and optical quality allowed potassium titanyl phosphate (KTiOPO4, KTP) crystals to be used in a wide range of nonlinear applications. The success of KTP usage in the visible and infrared (IR) ranges drives interest in applying it at longer wavelengths, that is, in the terahertz (THz) range. We use THz optical properties of KTP crystals measured by terahertz time-domain spectrometer (THz-TDS) and refractive index approximated in the form of Sellmeier equations to investigate KTP application possibilities for IR-to-THz and THz-to-THz wave conversion. As a result, phase matching for s − f → f and s − f → s types of difference frequency generation (DFG) of Ti:Sapphire laser (at the wavelengths of 0.65, 0.8 and 1.1 µm) is found possible, as well as second harmonic generation (SHG) of THz waves by f + s→f type of interaction in the XZ principle plane of the crystal. Terahertz wave generation by phase-matched parametric processes in KTP demonstrates evident advantages in comparison with that of widely used MgO-doped LiNbO3 crystals.

scholarly journals Wide-range cyclic phase matching and second harmonic generation in whispering gallery resonators

2013 ◽  
Vol 103 (18) ◽  
pp. 181107 ◽  
Author(s):  
Guoping Lin ◽  
Josef U. Fürst ◽  
Dmitry V. Strekalov ◽  
Nan Yu
Keyword(s):  
Second Harmonic Generation ◽  
Harmonic Generation ◽  
Second Harmonic ◽  
Phase Matching ◽  
Whispering Gallery ◽  
Wide Range ◽  
Cyclic Phase

scholarly journals SINGLE DOMAIN WALL EFFECT ON PARAMETRIC PROCESSES VIA CHERENKOV-TYPE PHASE MATCHING

2011 ◽  
Vol 20 (04) ◽  
pp. 459-466 ◽  
Author(s):  
HUAIJIN REN ◽  
XUEWEI DENG ◽  
YUANLIN ZHENG ◽  
XIANFENG CHEN
Keyword(s):  
Domain Wall ◽  
Second Harmonic ◽  
Incident Light ◽  
Single Domain ◽  
Experimental Result ◽  
Phase Matching ◽  
Ferroelectric Crystal ◽  
Sum Frequency ◽  
Type Phase ◽  
Parametric Processes

We report on a new character of single domain wall (DW) of electrically-poled ferroelectric crystal which can modulate parametric processes via Cherenkov-type phase matching. Experimental result shows that the effective nonlinear polarization is confined in DW, and its phase velocity can be modulated when incident light is off the domain wall's direction. These effects lead to novel Cherenkov second harmonic generation (CSHG), and other modulated parametric process, such as Cherenkov sum frequency generation (CSFG).

Mps3 Layered Intercalates as Insulating Magnets: Towards Nanocomposites Associating Ferrimagnetism and Non-Linear Optical Properties

1993 ◽  
Vol 328 ◽  
Author(s):  
Rene Clement ◽  
Pascal G. Lacroix
Keyword(s):  
Magnetic Properties ◽  
Optical Properties ◽  
Harmonic Generation ◽  
Positive Charge ◽  
Spontaneous Magnetization ◽  
Second Harmonic ◽  
Host Lattice ◽  
Wide Range ◽  
Linear Optical Properties

ABSTRACTThe layered MIIPS3 compounds posess a unique cation exchange intercalation chemistry, which allows the synthesis of a wide range of air stable M1-xPS3G2x intercalates (G stands here for a Monocation). The positive charge of the guest cations is counterbalanced by intralayer metallic vacancies.Intercalation exerts a dramatic influence on the magnetic properties of these compounds. Whereas pristine MPS3 compounds order antiferromagnetically (M = Mn, Fe‥), Many intercalates become magnets below an ordering temperature that can be as high as 92 K. The role of intercalation is discussed in terms of the creation of intralayer metallic vacancies, which destroy the spin balance that prevails in pristine MPS3 compounds.The MPS3 host lattice has the capability of causing spontaneous poling of the dimethylamino-N-Methyl stilbazolium chromophore (DAMS), leading to materials that exhibit strong second harmonic generation. (SHG). Inserting DAMS into MnPS3 therefore leads to a composite that possess both spontaneous Magnetization (below Tc = 40 K) and a strong efficiency for SHG.

scholarly journals Oxide nonlinear crystals: optical properties and phase-matching for terahertz wave generation

2018 ◽  
Vol 195 ◽  
pp. 06012
Author(s):  
O.I. Potaturkin ◽  
V.D. Antsygin ◽  
A.A. Mamrashev ◽  
N.A. Nikolaev ◽  
Yu.M. Andreev ◽  
...  
Keyword(s):  
Optical Properties ◽  
Terahertz Wave ◽  
Wave Generation ◽  
Phase Matching ◽  
Nonlinear Crystals

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.

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