Results 121 to 130 of about 169 (165)
Some of the next articles are maybe not open access.
Nonlinearity of the refractive index of doped insulators
Soviet Journal of Quantum Electronics, 1985Relationships are obtained for the nonlinear resonant polarization of a multilevel system in the field of a monochromatic light wave under noncoherent interaction conditions allowing for anharmonicity of the electron oscillator and the dynamic Stark shift.
G B Al'tshuler, S A Kozlov
openaire +1 more source
Measurements of the anisotropic nonlinear refractive-index coefficients of ruby
Optics Letters, 1990The real part n(2)' of the complex nonlinear refractive-index coefficients of ruby crystal (Cr(3+):Al(2)O(3)) are measured by the Mach-Zehnder interferometric method. The n(2)' values measured at 514.5 nm for the light polarization perpendicular (sigma) and parallel (pi) to the crystal c axis are (2.81 +/- 0.36) 10(-8) and (1.33 +/- 0.17) x 10(-8) cm(2)
H K, Lee, S S, Lee
openaire +2 more sources
Applied Optics, 1997
We developed a method to measure the nonlinear refractive-index coefficient of fibers using a nonlinear Sagnac interferometer. To enhance the measurement accuracy, we employed a phase-sensitive detection technique using a rotational sensitive property of the Sagnac interferometer. The measured values were reproducible to within 10 % accuracy.
H K, Lee, K H, Kim, el-H, Lee
openaire +2 more sources
We developed a method to measure the nonlinear refractive-index coefficient of fibers using a nonlinear Sagnac interferometer. To enhance the measurement accuracy, we employed a phase-sensitive detection technique using a rotational sensitive property of the Sagnac interferometer. The measured values were reproducible to within 10 % accuracy.
H K, Lee, K H, Kim, el-H, Lee
openaire +2 more sources
Measurements of a nonlinear refractive index with a single laser pulse
Applied Optics, 1997We demonstrate a theoretical model and the experimental proof of a new method for n(2) measurements using single pulses. The advantage of the method is fast measurement, a simple setup, and independence from small nonlinear absorptions and thermal effects.
J, Hein, M, Helbig, S, Rentsch
openaire +2 more sources
Higher-order nonlinearity of refractive index: The case of argon
The Journal of Chemical Physics, 2014The nonlinear coefficients, n4, of the time-dependent refractive index for argon are calculated in the non-resonant optical regime. Second-order polynomial fitting of DC-Kerr, γ(2)(−ω; ω, 0, 0), electric field induced second harmonic generation (ESHG), γ(2)(−2ω; ω, ω, 0), and static second-order hyperpolarizability, γ(2)(0; 0, 0, 0), is performed using
Maryam, Tarazkar +2 more
openaire +2 more sources
Continuous-wave measurement of the fiber nonlinear refractive index
Optics Letters, 1998We propose a technique for measuring the nonlinear refractive index of fiber based on transmission-coefficient measurements in a fiber Sagnac interferometer. In contrast with traditional methods, the proposed method uses a single optical source operating in cw mode and direct intensity measurement, enabling one to avoid the errors caused by fiber ...
D, Monzón-Hernández +4 more
openaire +2 more sources
Nonlinearities in Negative Refractive Index Media
Nonlinear Optics: Materials, Fundamentals and Applications, 2007We will review the progress made in the area of nonlinear phenomena and negative refractive index metamaterials. We will also discuss recent studies on susceptibility, wave-mixing and other nonlinear resonance properties of metamaterials.
openaire +1 more source
Polarization-dependent nonlinear refractive index of BiB3O6
Optical Materials, 2008Abstract The nonlinear refractive index of the monoclinic biaxial nonlinear crystal BiB3O6 (BIBO) was measured at 1064 nm for light polarization along the three principal optical axes using the single-beam z-scan technique. Strong anisotropy was observed with n2 values about two-times larger for polarization parallel to the Z-axis in comparison to ...
S. Miller +5 more
openaire +1 more source
Refraction Modulation Z-Scan for Measurement of Nonlinear Refractive Index
Ukrainian Journal of PhysicsWe present a novel single-beam refraction-modulation Z-scan technique that combines elements of the standard Z-scan and loss-modulation methods to enable sensitive measurement of third-order refractive nonlinearities in the closed-aperture configuration. Compared with the original Z-scan technique, the proposed method provides an almost background-free
Kadan, V. +6 more
openaire +2 more sources
Nonlinear refractive index of CS2 at 10 μm
Annual Meeting Optical Society of America, 1987The reported values of the nonlinear refractive index n(l) of CS2 near 10 μm differ by 3 orders of magnitude, and the mechanisms responsible for the nonlinearity are not understood.1 We measure n(l) for CS2 directly by observing the deflection of a CO2 laser beam which traverses a prismatic cell filled with CS2 as a function of intensity up to 10 MW ...
Y. Beaudoin +3 more
openaire +1 more source