Characterization of a second-order nonlinear layer profile in thermally poled optical fibers with second-harmonic microscopy

2005 ◽  
Vol 30 (8) ◽  
pp. 866 ◽  
Author(s):  
Honglin An ◽  
Simon Fleming
Keyword(s):  
Optical Fibers ◽  
Second Harmonic ◽  
Second Order ◽  
Nonlinear Layer ◽  
Thermally Poled

Visualization of second-order nonlinear layer in thermally poled fused silica glass

2004 ◽  
Vol 85 (24) ◽  
pp. 5819-5821 ◽  
Author(s):  
Honglin An ◽  
Simon Fleming ◽  
Guy Cox
Keyword(s):  
Silica Glass ◽  
Fused Silica ◽  
Second Order ◽  
Nonlinear Layer ◽  
Thermally Poled ◽  
Fused Silica Glass

The thickness evolution of the second-order nonlinear layer in thermally poled fused silica

2001 ◽  
Vol 189 (1-3) ◽  
pp. 161-166 ◽  
Author(s):  
Mingxin Qiu ◽  
Shinji Egawa ◽  
Keiichi Horimoto ◽  
Toru Mizunami
Keyword(s):  
Fused Silica ◽  
Second Order ◽  
Nonlinear Layer ◽  
Thermally Poled

Quadratic Electro-Optical Characterization of Molecular Nonlinear optical Materials

1987 ◽  
Vol 109 ◽  
Author(s):  
John C. Luong ◽  
N. F. Borrelli ◽  
A. R. Olszeuski
Keyword(s):  
Optical Materials ◽  
Nonlinear Optical ◽  
Second Harmonic ◽  
Low Frequency ◽  
Second Order ◽  
Third Order ◽  
Kerr Coefficient ◽  
Molecular Compounds ◽  
Order Susceptibility

ABSTRACTA convenient method of measuring the nonlinear optical properties of molecular compounds is described. The method involves measuring the quadratic electro-optical coefficient of a polymer composite containing a variable concentration of the candidate NLO material. The X(3) (ω) value obtained by this low-frequency Kerr measurement, after local-field corrections, can be compared to the nonresonant third-order susceptibility measured by degenerate-four-wave-mixing technique on selective samples. We find that the choice of the polymer matrix dictates the contribution of second-order susceptibility to the Kerr coefficient. Therefore, our method can also be extended to the measurement of second-order susceptibility, analogous to the technique of field-induced second-harmonic-generation.

scholarly journals Synthesis and Characterization of New Benzo[e]Indol Salts for Second-Order Nonlinear Optics

Crystals ◽  
2020 ◽  
Vol 10 (4) ◽  
pp. 242 ◽  
Author(s):  
Jiahui Wen ◽  
Linjun Ping ◽  
Ruian Li ◽  
Shufang Shang ◽  
Weidong Zhao ◽  
...  
Keyword(s):  
Data Storage ◽  
Optical Materials ◽  
Second Harmonic ◽  
Optical Quality ◽  
Optical Data Storage ◽  
Second Order ◽  
Optical Data ◽  
Slow Cooling ◽  
Cooling Method

Organic second-order nonlinear optical materials are of great significance in the field of integrated photonics, optical data storage and optical information processing. In this work, two iodide salts with benzo[e]indol cations as electron-withdrawing groups were designed and synthesized, which are (E)-2-(4-hydroxy-3-methoxystyryl)-1,1,3-trimethyl-1H-benzo[e]indol-3-ium iodide (1-TB) and (E)-2-(3,4-dihydroxystyryl)-1,1,3-trimethyl-1H-benzo[e]indol-3-ium iodide (2-TB). Under the irradiation of 1064 nm laser, the second harmonic generations of the 1-TB and 2-TB powders are 760 and 580 times that of urea, respectively. Among them, crystals of 1-TB are successfully grown by a slow cooling method without using seed crystals. Bulk crystal with a size of 8.0 × 3.0 × 1.0 mm3 and many submillimeter single crystals with excellent optical quality are obtained.

scholarly journals Thermal Poling of New Double-Hole Optical Fibers

2019 ◽  
Vol 9 (11) ◽  
pp. 2176 ◽  
Author(s):  
Shuilian Wang ◽  
Zhenyi Chen ◽  
Na Chen ◽  
Wenjie Xu ◽  
Qiangda Hao ◽  
...  
Keyword(s):  
Optical Fibers ◽  
Nonlinear Coefficient ◽  
Fused Silica ◽  
Second Order ◽  
Central Symmetry ◽  
Internal Electric Field ◽  
Element Analysis ◽  
Thermal Poling ◽  
Thermally Poled ◽  
Second Order Nonlinearity

Fused silica are common fiber materials which have macroscopic central symmetry without second-order nonlinearity. Studies have shown that thermal poling of fused silica fibers can destroy this macroscopic central symmetry, resulting in second-order nonlinearity or linear electro-optical effects. In this paper, a new type of double-hole optical fiber is designed. A two-dimensional (2D) numerical model is used to simulate the movement of ions and the formation of space charge region by finite element analysis. It is found that the single round square hole structure of the new double-hole fiber promotes the thermal poling process. The effective second-order nonlinear coefficient χ eff ( 2 ) of the new double-hole poled fiber is 0.28 pm/V at the core center, which is 0.05 pm/V higher than that of the circular double-hole poled fiber. In the fiber core, the radial distribution of the internal electric field and of χ eff ( 2 ) is calculated and analyzed. The results of this paper are of great significance for the application of thermally poled fibers on nonlinear all-fiber devices.

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