Measurement of the nonlinear refractive index of long dispersion-shifted fibers by self-phase modulation at 1.55 μm

1998 ◽  
Vol 16 (6) ◽  
pp. 1006-1012 ◽  
Author(s):  
R.H. Stolen ◽  
W.A. Reed ◽  
K.S. Kim ◽  
G.T. Harvey
Keyword(s):  
Refractive Index ◽  
Nonlinear Refractive Index ◽  
Phase Modulation ◽  
Self Phase Modulation

Nonlinear Refractive Index of Silicon Nanoparticles: A Short Review

2014 ◽  
Vol 1 (2) ◽  
pp. 87-97
Author(s):  
Sudakshina Prusty
Keyword(s):  
Refractive Index ◽  
Nonlinear Refractive Index ◽  
Phase Modulation ◽  
Silicon Nanoparticles ◽  
Nonlinear Coefficient ◽  
Short Review ◽  
Self Phase Modulation ◽  
Physical Mechanisms ◽  
Self Focusing ◽  
Physical Phenomena

This article discusses the nonlinear refractive index of silicon nanoparticles starting from the basic formalism to some of the consequent physical phenomena like self focusing and self phase modulation. Several experimental techniques mainly based on Z-scan are discussed to measure the nonlinear refractive index. Another less explored technique for silicon nanoparticles, which studies the far-field optical fringe pattern formed by spatial self-phase modulation, is also discussed. Computation of the nonlinear refractive index is shown in detail by employing these two techniques. While Z-scan can estimate the nonlinear coefficient of a medium in a chosen time scale, the optical fringe method can predict the overall nonlinear refractive index due to all possible physical mechanisms. Some of the recent results for silicon nanoparticles using these two techniques are also discussed.

scholarly journals Determination of nonlinear refractive index in a Ta2O5 rib waveguide using self-phase modulation

2004 ◽  
Vol 12 (21) ◽  
pp. 5110 ◽  
Author(s):  
Chao-Yi Tai ◽  
James S. Wilkinson ◽  
Nicolas M. B. Perney ◽  
M. Caterina Netti ◽  
F. Cattaneo ◽  
...  
Keyword(s):  
Refractive Index ◽  
Nonlinear Refractive Index ◽  
Phase Modulation ◽  
Rib Waveguide ◽  
Self Phase Modulation

Tunable effective nonlinear refractive index of graphene dispersions during the distortion of spatial self-phase modulation

2014 ◽  
Vol 104 (14) ◽  
pp. 141909 ◽  
Author(s):  
Gaozhong Wang ◽  
Saifeng Zhang ◽  
Fadhil A. Umran ◽  
Xin Cheng ◽  
Ningning Dong ◽  
...  
Keyword(s):  
Refractive Index ◽  
Nonlinear Refractive Index ◽  
Phase Modulation ◽  
Self Phase Modulation

scholarly journals Anisotropic nonlinear refractive index measurement of a photorefractive crystal via spatial self-phase modulation

2019 ◽  
Vol 27 (21) ◽  
pp. 30360 ◽  
Author(s):  
Omar Boughdad ◽  
Aurélien Eloy ◽  
Fabrice Mortessagne ◽  
Matthieu Bellec ◽  
Claire Michel
Keyword(s):  
Refractive Index ◽  
Nonlinear Refractive Index ◽  
Phase Modulation ◽  
Photorefractive Crystal ◽  
Refractive Index Measurement ◽  
Self Phase Modulation ◽  
Index Measurement

scholarly journals О возможности исследования доли неоднородностей оптических нелинейных сред с помощью осевой цифровой голографии с временным разрешением

2021 ◽  
Vol 91 (5) ◽  
pp. 846
Author(s):  
А.В. Белашов ◽  
Ч.-Ж. Чжень ◽  
Н.В. Петров
Keyword(s):  
Refractive Index ◽  
Nonlinear Refractive Index ◽  
Phase Modulation ◽  
Time Delays ◽  
Digital Holography ◽  
Fourier Spectrum ◽  
Fresnel Diffraction ◽  
Pump And Probe ◽  
Digital Holograms ◽  
Diffraction Patterns

An approach to determining the fraction of local inhomogeneities nonlinear refractive index n2 in a transparent medium is considered. Data recording was performed using inline digital holography with femtosecond time resolution, where a set of probe beam inline digital holograms in the Fresnel diffraction zone to be recorded at various time delays between the pump and probe pulses. Digital holograms contain diffraction patterns that have information about the induced degenerate non-collinear phase modulation formed in the presence of nonlinear refractive index inhomogeneities. The developed algorithm is based on the calculation of the diffraction patterns Fourier spectrum and analysis of the intensity at zero spatial frequency. The proposed method has been validated in numerical modeling. An approach to determining the fraction of local inhomogeneities nonlinear refractive-index coefficient n2 in a transparent medium is considered. Data recording was performed using time-resolved inline digital holography, where a set of inline digital holograms in the Fresnel diffraction zone to be recorded in a probe beam at various time delays between the pump and probe pulses. Digital holograms contain diffraction patterns that have information about the induced degenerate noncollinear phase modulation formed in the presence of nonlinear refractive index inhomogeneities. The developed algorithm is based on the calculation of the diffraction patterns Fourier spectrum and analysis of the intensity at zero spatial frequency. The proposed method has been validated in numerical simulation.

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