scholarly journals Second Harmonic of Laser Radiation for IR-Range in Mixed AgGa0.6In0.4Se2 Crystals

2014 ◽  
Vol 2014 ◽  
pp. 1-5
Author(s):  
Rena J. Kasumova
Keyword(s):  
Laser Radiation ◽  
Conversion Efficiency ◽  
Analytical Method ◽  
Second Harmonic ◽  
Phase Matching ◽  
Angular Dispersion ◽  
Dispersion Coefficients ◽  
Optimum Parameters

The results of investigations of the influence of different parameters on conversion efficiency in mixed AgGa0.6In0.4Se2 crystal in conditions of existing experiments are cited. The angular dispersion coefficients for three versions of crystal AgGaxIn⁡1-xSe2, differing by a content of indium, have been calculated. A comparison was made of the obtained results on conversion efficiency with analogous results in case of other crystals and with corresponding experimentally measured values. The applied analytical method makes it possible to calculate the optimum parameters of both crystal-converter and a source of radiation for conditions of uncritical phase matching in the concrete experiment.

ENHANCING CONVERSION EFFICIENCY IN THE SECOND-ORDER NONLINEAR OPTICAL PHENOMENA

2004 ◽  
Vol 13 (03n04) ◽  
pp. 445-449
Author(s):  
JONGBAE KIM ◽  
JUNG JIN JU ◽  
MIN-SU KIM
Keyword(s):  
Harmonic Generation ◽  
Conversion Efficiency ◽  
Nonlinear Optical ◽  
Second Harmonic ◽  
Second Order ◽  
Phase Matching ◽  
Quasi Phase Matching ◽  
Optical Phenomena ◽  
Nonlinear Optical Phenomena ◽  
Second Order Nonlinearity

The distributions of electric field and the induced second-order nonlinearity are discussed in a poling scheme where the width of a periodic electrode is shorter than the conventional coherent length. The theoretical aspects of quasi-phase matching for a subsequent experiment in second harmonic generation are analyzed. The present analysis consistently explains that the conversion efficiency can be enhanced if the electrode width is shortened, and maximized if the electrode width is optimized.

Growth and properties of KBe2BO3F2 crystal

2003 ◽  
Vol 18 (10) ◽  
pp. 2478-2485 ◽  
Author(s):  
Jiyang Wang ◽  
Chenqian Zhang ◽  
Yaogang Liu ◽  
Jianxiu Zhang ◽  
Xiaobo Hu ◽  
...  
Keyword(s):  
Harmonic Generation ◽  
Conversion Efficiency ◽  
Second Harmonic ◽  
Frequency Doubling ◽  
Molar Ratio ◽  
Phase Matching ◽  
Spontaneous Nucleation ◽  
Force Microscopy ◽  
Atomic Force ◽  
The Ideal

Single crystals of KBeBO3F (KBBF) up to 2 mm in thickness were grown by using a spontaneous nucleation method. The flux was composed of KF and B2O3, and the optimal ratio for growing KBBF single crystal thicker than 1 mm is suggested to be (1.0–1.5):(5.0):(0.7–1.2) (KBBF:KF:B2O3) in molar ratio. The ideal morphology of.KBBF is two sets of tabular facets and a set of rhombic facets. Surface morphology.was characterized both by optical microscopy and atomic force microscopy. Transmission spectra showed that high transmission was maintained up to 170 nm. Based on refractive index measurements, phase matching curves for types I and II were determined. Using a prism coupling method, the effective fourth harmonic generation for an Nd:YAB laser was realized in an 0.6-mm-thick KBBF sample. The output energy of the 266-nm beam was 0.282 mJ, and the conversion efficiency was 11.8%. A 183.6-nm laser over 1 mW was obtained from a Ti:sapphire second harmonic generation beam in an 0.8-mm KBBF sample. The conversion efficiency reached 2.3%. A 179.4-nm laser was also observed from a 358.7-nm laser by directly frequency doubling. This is the shortest wavelength obtained through nonlinear optical processes in a solid-state laser.

SECOND OPTICAL HARMONIC GENERATION OF CO2 LASER RADIATION IN CGA CRYSTAL

2013 ◽  
Vol 22 (02) ◽  
pp. 1350023
Author(s):  
RENA J. KASUMOVA
Keyword(s):  
Laser Radiation ◽  
Second Harmonic Generation ◽  
Harmonic Generation ◽  
Nonlinear Interaction ◽  
Second Harmonic ◽  
Phase Matching ◽  
Constant Intensity ◽  
Optical Harmonic Generation ◽  
Co2 Laser Radiation ◽  
Optical Harmonic

In this work, second harmonic generation has been investigated for radiation in IR-range of spectrum at the constant-intensity approximation. The detailed analysis of nonlinear interaction of optical waves have been studied in CGA, ZAP and AgGa0.6In0.4Se2 crystals and the comparison of the obtained results have been made on conversion efficiency with experimentally calculated values. The conditions for realization have been determined for the regime close to the uncritical angular phase matching. The recommendations are suggested on elaboration of the reliability of highly efficient generators for second harmonic in the IR-range, specially the generators of second harmonic of the CO2 lasers.

scholarly journals Angular non-critical phase-matching second-harmonic-generation characteristics of RECOB (RE = Tm, Y, Gd, Sm, Nd and La) crystals

2017 ◽  
Vol 25 (10) ◽  
pp. 11867 ◽  
Author(s):  
Yanqing Liu ◽  
Zhengping Wang ◽  
Fapeng Yu ◽  
Hongwei Qi ◽  
Xiuqin Yang ◽  
...  
Keyword(s):  
Second Harmonic Generation ◽  
Harmonic Generation ◽  
Second Harmonic ◽  
Phase Matching ◽  
Critical Phase
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