We demonstrate a polarization-managed 8-dimensional modulation format that is time domain coded to reduce inter-channel nonlinearity. Simulation results show 2.3 dB improvement in maximum net system margin (NSM) relative polarization multiplexed (PM)-BPSK, and 1.0 interleaved return-to-zero (RZ)-PM-BPSK, for five WDM channels propagating over 1600 km ELEAF with 90% inline optical dispersion compensation. In contrast the other modulations considered, new has negligible sensitivity states of...

The nonlinear properties of a low loss hydrogenated amorphous silicon core fiber have been characterized for transmission high power pulses at 1540 nm.Numerical modelling the pulse propagation in material was used to establish two-photon absorption, free-carrier absorption and refractive index, which were found be larger than values typical crystalline silicon.Calculation figure merit demonstrates potential these fibers photonics applications.

Abstract Microresonators are ideal systems for probing nonlinear phenomena at low thresholds due to their small mode volumes and high quality ( Q ) factors. As such, they have found use both fundamental studies of light-matter interactions as well applications in areas ranging from telecommunications medicine. In particular, semiconductor-based resonators with large Kerr nonlinearities great potential speed, power all-optical processing. Here we present experiments characterize the size...

All-optical modulation based on degenerate and non-degenerate two-photon absorption (TPA) is demonstrated within a hydrogenated amorphous silicon core optical fiber.The nonlinear strength determined by comparing the results of pump-probe experiments with numerical simulations coupled propagation equations.Subpicosecond achieved an extinction ratio more than 4 dB at telecommunications wavelengths, indicating potential for these fibers to find use in high speed signal processing applications.

Germanium optical fibers have been fabricated using a high pressure chemical deposition technique to deposit the semiconductor material inside silica capillary. The amorphous germanium core has small percentage of hydrogen that saturates dangling bonds reduce absorption loss. Optical transmission measurements were performed determine linear losses over broad mid-infrared wavelength range with lowest loss recorded at 10.6 μm. extended measured in demonstrates their potential for use applications.

The nonlinear transmission properties of hydrogenated amorphous silicon (a-Si:H) core fibers are characterized from the near-infrared up to edge mid-infrared regime.The results show that this material exhibits linear losses on order a few dB/cm, or less, over entire wavelength range, decreasing down value 0.29 dB/cm at 2.7 μm, and negligible beyond two-photon absorption (TPA) ∼ 1.7 μm.By measuring dispersion Kerr TPA parameters we have found figure merit (FOM NL ) increases dramatically...

This article will discuss the collaboratively formed cross-industry open cables concept for characterizing optical performance of undersea with intent assessing and understanding their capacity potential. The proposes definitions two critical nonlinear linear metrics cables: GSNR (Gaussian or generalized signal to noise ratio) SNR <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">ASE</sub> (Signal ratio amplified spontaneous emission), including...

We present a characterization of the spectral modulation and wavelength shifting induced via cross-phase (XPM) in hydrogenated amorphous silicon (a-Si:H) core optical fiber. Pump-probe experiments using picosecond femtosecond signal pulses are shown to be good agreement with numerical simulations coupled nonlinear propagation equations. The large 10nm red-shifts obtained probe attributed high Kerr nonlinearity a-Si:H material. Extinction ratios as 12 dB measured for conversion process at...

Multimode propagation in silicon core optical fibers is investigated via numerical modeling of the coupled mode equations. The simulations consider spectral evolution two with different micrometer-sized cores that have experimentally been shown to exhibit nonlinear broadening. results indicate most power propagated fundamental each fiber, a small contribution from higher-order modes affecting shape but not width

We explore the thermally induced nonlinearity in hydrogenated amorphous silicon microcylindrical resonators that are fabricated from optical fiber platform. In particular, we use a pump-probe technique to experimentally demonstrate modulation and determine response time. Through characterization of thermal properties associated resonance wavelength shifts, will show it is possible infer material absorption coefficient for range whispering gallery mode resonators.

In this paper, we experimentally study DC-PM-BPSK, PM-QPSK, and PM-16QAM at 35 Gbaud for undersea transmission in a WDM environment with frequency spacing ranging from 50 GHz (DWDM) to 33 (Super-Nyquist). The experimental focuses on noise, linear cross-talk, nonlinear tolerance two applications: (1) Legacy dispersion-managed submarine cables up 5,000 km length (2) New uncompensated 12,500 length. We demonstrate that reduction below the symbol rate can be achieved, quantify performance...

We report on the mid-infrared nonlinear photothermal spectrum of neat liquid crystal 4-Octyl-4'-Cyanobiphenyl (8CB) using a tunable Quantum Cascade Laser (QCL). The nonequilibrium steady state characterized by infrared response undergoes supercritical pitchfork bifurcation. bifurcation, observed in heterodyne two-color pump-probe detection, leads to ultrasharp spectra similar those reported visible region. A systematic study peak splitting as function absorbed power shows bifurcation has...

We investigate the Kerr nonlinearity in a-Si:H based microcylindrical resonators. The large resonant wavelength shift observed for pulsed excitation is used to demonstrate ultrafast all-optical switching.

With the advent of digital signal processing (DSP) in optical transmitters and receivers, ability to finely tune ratio pre post dispersion compensation can be exploited best mitigate nonlinear penalties caused by Kerr effect. A portion penalty communication channels has been explained an increase peak average power (PAPR) inherent highly dispersed signals. The standard approach for minimizing these impairments applies 50% compensation, thereby decreasing PAPR along length cable, as compared...

The nonlinear transmission properties of two hydrogenated amorphous silicon fibers with core diameters 5.7 µm and 1.7 are characterized. measured Kerr nonlinearity, two-photon absorption free-carrier parameters will be discussed in relation to device performance.

Get PDF Email Share with Facebook Tweet This Post on reddit LinkedIn Add to CiteULike Mendeley BibSonomy Citation Copy Text P. Mehta, N. Healy, R. Slavík, T. Watts, J. Sparks, D. Day, A. Sazio, V. Badding, and C. Peacock, "Nonlinearities in Silicon Optical Fibers," Fiber Communication Conference/National Optic Engineers Conference 2011, OSA Technical Digest (CD) (Optica Publishing Group, 2011), paper OThS3. Export BibTex Endnote (RIS) HTML Plain alert Save article

Get PDF Email Share with Facebook Tweet This Post on reddit LinkedIn Add to CiteULike Mendeley BibSonomy Citation Copy Text A. C. Peacock, L. Shen, P. Mehta, and N. Healy, "Nonlinear properties of silicon optical fibers from telecoms the mid-infrared," in Frontiers Optics 2014, OSA Technical Digest (online) (Optica Publishing Group, 2014), paper FW1D.5. Export BibTex Endnote (RIS) HTML Plain alert Save article

The wavelength dependence of the nonlinear properties hydrogenated amorphous silicon core fibers are characterized across two-photon absorption edge. These novel exhibit a significant increase in figure merit around 2µm.

Degenerate and non-degenerate two-photon absorption based modulation is demonstrated in a hydrogenated amorphous silicon core optical fiber. We show using femtosecond pulses compare this with theory.

The state of the art silicon optical fibers fabricated via high pressure chemical deposition technique will be reviewed. transmission properties step index presented, including investigations nonlinearities that can used for all-optical signal processing. In addition, alternative complex fiber geometries permit sophisticated control propagating light introduced.