Novel Guest–Host Type Polymer Films for Stable and Large Second-Order Nonlinearity and Waveguide Property

The strategy of introducing the chromophores with low ground state dipole moment had been discussed to overcome the effect of the electrostatic interaction between the chromophores in the poled polymer films on its nonlinearity. As a result, the effective nonlinear optical coefficient d33 of the poled films, containing the chromophores with μg in the range of 3.5–5.5 D, will enhance at least 15%, even over 30%, compared to that of 7.5 D if the first hyperpolarizabilities (β) of chromophores are in the same magnitudes. And, under the above assumption, the same level of the d33 could even be achieved by utilizing the chromophores with μg as low as 2.2 D.

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Nonlinear Analysis of Visual Evoked Potentials Elicited by Color Stimulation

Methods of Information in Medicine ◽

10.1055/s-0038-1636871 ◽

1997 ◽

Vol 36 (04/05) ◽

pp. 315-318 ◽

Cited By ~ 3

Author(s):

K. Momose ◽

K. Komiya ◽

A. Uchiyama

Keyword(s):

Visual System ◽

Evoked Potentials ◽

Visual Evoked Potentials ◽

Normal Subjects ◽

Second Order ◽

First Order ◽

The Relationship ◽

Perceived Color ◽

Second Order Nonlinearity ◽

Visual Evoked

Abstract:The relationship between chromatically modulated stimuli and visual evoked potentials (VEPs) was considered. VEPs of normal subjects elicited by chromatically modulated stimuli were measured under several color adaptations, and their binary kernels were estimated. Up to the second-order, binary kernels obtained from VEPs were so characteristic that the VEP-chromatic modulation system showed second-order nonlinearity. First-order binary kernels depended on the color of the stimulus and adaptation, whereas second-order kernels showed almost no difference. This result indicates that the waveforms of first-order binary kernels reflect perceived color (hue). This supports the suggestion that kernels of VEPs include color responses, and could be used as a probe with which to examine the color visual system.

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The Lower Bounds on the Second Order Nonlinearity of Bent Functions and Semi-bent Functions

JOURNAL OF ELECTRONICS INFORMATION TECHNOLOGY ◽

10.3724/sp.j.1146.2010.00191 ◽

2010 ◽

Vol 32 (10) ◽

pp. 2521-2525

Author(s):

Xue-lian Li ◽

Yu-pu Hu ◽

Jun-tao Gao

Keyword(s):

Lower Bounds ◽

Second Order ◽

Bent Functions ◽

Second Order Nonlinearity

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Optical second-order nonlinearity of poled borosilicate glass containing CuCl

Journal of Applied Physics ◽

10.1063/1.1288011 ◽

2000 ◽

Vol 88 (5) ◽

pp. 2200-2204 ◽

Cited By ~ 3

Author(s):

Jun Sasai ◽

Katsuhisa Tanaka ◽

Kazuyuki Hirao

Keyword(s):

Borosilicate Glass ◽

Second Order ◽

Second Order Nonlinearity

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WAVELENGTH CONVERSION OF AN INFRARED SIGNAL THROUGH CASCADED SECOND-ORDER NONLINEARITY IN A LITHIUM-NIOBATE CHANNEL WAVEGUIDE

Journal of Nonlinear Optical Physics & Materials ◽

10.1142/s0218863500000030 ◽

2000 ◽

Vol 09 (01) ◽

pp. 11-20 ◽

Cited By ~ 3

Author(s):

I. CRISTIANI ◽

M. RINI ◽

A. RAMPULLA ◽

G. P. BANFI ◽

V. DEGIORGIO

Keyword(s):

Lithium Niobate ◽

Pulse Energy ◽

Wavelength Conversion ◽

Second Order ◽

Channel Waveguide ◽

Phase Matching ◽

Order Process ◽

Pump Pulse Energy ◽

Second Order Nonlinearity ◽

Second Order Process

We describe a wavelength conversion experiment (generation of a pulse at the wavelength λp - Δλ from a signal at λp+Δλ under the action of a pump at λp) performed through cascaded second-order process in a lithium niobate channel waveguide. With a 58-mm-long Ti diffused channel waveguide, λp=1.1 μ m (the wavelength of phase matching for the first step of sh generation), Δλ of several nanometers and 20 ps pulse duration, wavelength conversion with unit efficiency is obtained with a pump pulse energy of the order of 102 pJ. The experimental results are successfully interpreted by making use of modal analysis and solving the appropriate nonlinear equations.

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