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All optical WDM system has the benefit of increased transmission distance and high capacity. The reach of these systems is severely limited by the noise contributed from the combined nonlinear effects inherent in the optical fiber. Of these effects, stimulated Raman scattering (SRS) and four wave mixing (FWM) are the important factors that limit the system capacity and degrade the signal quality....
We present an overview of our work in instantaneous frequency measurement systems employing optical mixing and DC detection which are capable of measuring both the frequency and power of an RF over ultrahigh bandwidths from DC to 40 GHz. We particularly focus on all optical systems employing four wave mixing in highly nonlinear fibers.
This paper presents a review of novel methods that have been proposed by many authors for nonlinear optical effects suppression in WDM systems. Among the major nonlinear optical effects in WDM systems include nonlinear crosstalk, cross-phase modulation (XPM) and four wave mixing (FWM). These nonlinearities will degrade the performance of WDM systems particularly at bit rates higher than 2.5 Gbit/s...
Frequency entangled photon pairs generated by using four wave mixing in a Sagnac fiber loop are presented. Coincidence detection shows the quantum interference in the form of spatial beating with a visibility of (95plusmn2)%.
A study was done to observe one of the characteristics of photonic crystal fibre (PCF), whereby it has the ability to generate four wave mixing (FWM). Through this characteristic, few theories related are presented in relation to this phenomenon and comparison is done towards the results obtained. The measurement arrangement is also described.
We describe the creation and characterization of entangled or hyper-entangled quantum states using a fiber-based two-photon source. We use these entangled states to study local- and non-local realism.
We investigate the potential of four-wave mixing for VUV pulse generation in hollow waveguides with unprecedented short pulse durations and predict the generation of a 2.5 fs pulse at 160 nm using a 10 fs, 800 nm idler.
A polarization insensitive quasi-asynchronous optical sampling oscilloscope with sub-ps-resolution is presented. The scheme is able to resolve tens of ns and provides eye-diagram functionality. Experimental results for a 640 Gb/s data frame are reported.
We have developed an ultra-bright pair-photon source using four wave mixing in micro-structured fibres. This source can serve as a new universal source for quantum information experiments. Using photon pairs created by four-wave mixing, we demonstrate non-classical interference between two separated sources and preliminary evidence for entangled photon pair generation both with high counting rate
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