Optimized all-optical amplitude reshaping by exploiting nonlinear phase shift in fiber for degenerated FWM

2012 ◽  
Vol 10 (5) ◽  
pp. 050601-50603 ◽  
Author(s):  
Heng Zhou Heng Zhou ◽  
Kun Qiu Kun Qiu ◽  
Fengfeng Tian Fengfeng Tian
Keyword(s):  
Phase Shift ◽  
Nonlinear Phase Shift ◽  
Nonlinear Phase ◽  
All Optical

Material Requirements For All-Optical Devices:Nonlinear Properties of Poly-4BCMU

1991 ◽  
Vol 228 ◽  
Author(s):  
G. I. Stegeman ◽  
W. Torruellas ◽  
K. B. Rochford ◽  
R. Zanoni ◽  
W. Krug ◽  
...  
Keyword(s):  
Phase Shift ◽  
Optical Switching ◽  
Photon Absorption ◽  
Nonlinear Material ◽  
Nonlinear Phase Shift ◽  
Linear Absorption ◽  
Absorption Length ◽  
Two Photon ◽  
Nonlinear Phase ◽  
All Optical

The non-resonant third order nonlinearity of conjugated polymers appears to be potentially useful for all-optical devices in waveguide formats.[l,2] This nonlinearity manifests itself as an intensity-dependent refractive index which leads to a nonlinear phase shift over some propagation distance. Device research over the last few years has shown that there are certain minimum requirements for the nonlinear phase shift that need to be achieved over one absorption length of the material.[l,3] There are two principal sources of absorption, the usual linear absorption which is independent of fluence, and two photon absorption for which the absorption scales linearly with intensity. Thus the usefulness of a nonlinear material for all-optical switching devices can be evaluated from a limited number of material parameters, namely n2 (in n = n0 + n2I where I is the local intensity), α0 which is the low power absorption coefficient and β which is the two photon coefficient (in α = α0 + βI). The problem for a given material is to identify spectral regions over which the minimum required phase shift can be achieved.

Nonlinear phase shift and all-optical switching in quasi-phase-matched quadratic media

1998 ◽  
Vol 23 (7) ◽  
pp. 506 ◽  
Author(s):  
Andrey Kobyakov ◽  
Falk Lederer ◽  
Ole Bang ◽  
Yuri S. Kivshar
Keyword(s):  
Phase Shift ◽  
Optical Switching ◽  
Nonlinear Phase Shift ◽  
Nonlinear Phase ◽  
All Optical ◽  
All Optical Switching

Pulse-Shape Dependent Time Averaging Effects in Interferometric Nonlinear Phase Shift Measurements

1997 ◽  
Vol 06 (02) ◽  
pp. 151-159
Author(s):  
Dug Y. Kim ◽  
George I. Stegeman
Keyword(s):  
Phase Shift ◽  
Pulse Shape ◽  
Optical Switching ◽  
Phase Shifts ◽  
Time Averaging ◽  
Optical Pulses ◽  
Nonlinear Phase Shift ◽  
Nonlinear Phase ◽  
All Optical ◽  
All Optical Switching

When optical pulses of temporal width less than or comparable to a detector's response time are used to interferometrically measure intensity-dependent phase shifts, it becomes necessary to use time-averaging protocols to deduce the material nonlinearity. Relations between the actual peak nonlinear phase shifts and the measured values are numerically evaluated for Gaussian and sech square pulse shapes. We believe that these results are also very important to understand the pulse break-up effect in Mach-Zehnder type all-optical switching applications.

scholarly journals Direct interferometric test of the nonlinear phase-shift gate

2021 ◽  
Vol 103 (2) ◽  
Author(s):  
Peter L. Kaulfuss ◽  
Paul M. Alsing ◽  
Edwin E. Hach ◽  
A. Matthew Smith ◽  
Michael L. Fanto
Keyword(s):  
Phase Shift ◽  
Nonlinear Phase Shift ◽  
Nonlinear Phase

Nonlinear phase shift via multistep χ(2) cascading

1998 ◽  
Vol 152 (1-3) ◽  
pp. 96-100 ◽  
Author(s):  
K Koynov ◽  
S Saltiel
Keyword(s):  
Phase Shift ◽  
Nonlinear Phase Shift ◽  
Nonlinear Phase
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