We study the nonlinear interference noise (NLIN) generated in SDM systems, and generalize NLIN model introduced context of single-mode fibers to multi-mode case.The generalized accounts for modulation-format dependence NLIN, gives scaling power with number transmitted modes.It also provides tools extending results wizard SDM.Unlike case effect MD cannot general be ignored case.We show that inclusion erases contribution FWM effects, significantly suppresses XPM.

We present a detailed statistical model of nonlinear interference noise (NLIN) in optical communication systems. demonstrate an efficient method calculating second-order statistics the NLIN coefficients, particularly their temporal autocorrelation and cross correlation. The is highly accurate predicting system performance metrics such as bit-error-rate signal-to-noise ratio, shown to provide better accuracy with respect models that use variance alone, when accounting for adaptive filtering...

Spectral processor based on arrayed waveguide grating and free-space manipulation is capable of arbitrary filtering at record metrics 0.8GHz resolution over 200GHz span. Narrowband coherent drop-demultiplexing controlled optical shaping demonstrated in unison with digital sub-banding.

We demonstrate a method for experimentally characterizing the second order statistics of nonlinear interference noise (NLIN) as an intersymbol (ISI) process. The enables measurement properties high-order ISI coefficients, which have been largely overlooked in past. ability measuring these is imperative designing effective NLIN mitigation schemes. variance, temporal correlation times, and cross correlations various coefficients are evaluated several system implementations.

We develop a method for inter-channel nonlinear interference noise (NLIN) mitigation, based on Turbo equalization and an extended Kalman smoother. The exploits both the unique statistical properties of NLIN soft-decision information from code structure, to obtain improved channel state estimation symbol detection. error-free rate is by up 0.3 b/symbols/polarization, 1000 km, 64-QAM, 32 Gbaud transmission over standard fiber.

Spectrally dispersed light from a fine resolution waveguide grating router (WGR) of 25-GHz free spectral range that radiates to space is spatially filtered at <italic xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">∼</i> 1 GHz optical and 50 MHz addressability using liquid crystal on Silicon (LCoS) spatial modulator (SLM). Fabrication imperfections leading phase errors the 32 arms WGR are corrected UV pulsed laser inscribe permanent path changes...

We investigate the potential of adaptive equalization techniques to mitigate interchannel nonlinear interference noise (NLIN). derive a lower bound on mutual information system using equalization, showing that channel estimation error determines equalizer's performance. develop an scheme which uses statistics NLIN obtain improved detection based Kalman filtering and maximum likelihood sequence estimation. This outperforms commonly used equalizers significantly increases

A record performance metric waveguide grating router (WGR) design with a 200 GHz free spectral range (FSR) capable of resolving sub-GHz resolution features is developed for fine photonic processor (PSP). The WGR's FSR was designed to support subchannel add/drop from superchannel 1 Tb/s capacity. Due fabrication imperfections, we introduce phase corrections the light beams emerging 250 waveguides WGR output using liquid crystal on silicon (LCoS) spatial modulator (SLM) placed in an imaging...

We correct fabrication phase errors of 63-arm, 50GHz FSR AWG to achieve 1GHz resolution, by imaging the waveguides onto a spatial light modulator. Variable bandwidth and center frequency tuning is achieved filtering.

We present a technique for optimizing advanced optical imaging methods nanoscale structures, such as those encountered in the inspection of cutting-edge semiconductor devices. The optimization flow is divided to two parts: simulating light-structure interaction using finite-difference time-domain (FDTD) method and system by means its transfer function. As case study, FDTD used simulate 10-nm silicon line-space static random-access memory patterns, with irregular structural protrusions...

In multi-subcarrier wavelength-division-multiplexed (WDM) systems, spectrally close subcarriers are influenced by nonlinearity in a similar way. This causes the nonlinear interference noise (NLIN) that affects them to be correlated - fact can exploited for mitigation. Focusing on effect of nonlinearity-induced phase (NLPN), we find auto-correlation and cross-correlation functions NLPN influencing different subcarriers, propose mitigation algorithm takes advantage these correlations so as...

We introduce the concept of universal virtual lab, an extension to lab platform [Golani <italic xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">et al.</i> 2016], enabling a fast and accurate simulation wideband nonlinear DWDM systems. The is compliant with non-ideal transmitter receiver architectures, distributed optical filters in link, inter-channel stimulated Raman scattering, it provides performance predictions even when adaptive equalization...

We propose a new type of photonic analog-to-digital converter (ADC), designed for high-resolution (>7 bit) and high sampling rates (scalable to tens GS/s). It is based on encoding the input analog voltage signal onto phase an optical pulse stream originating from mode-locked laser, uses spatial oversampling as means improve conversion resolution. This paper describes concept draws its similarities commonly used temporal oversampling. The design fabrication LiNbO(3)/silica hybrid integrated...

We present a method for the accurate prediction of BER in nonlinear systems, taking into account temporal correlations interference noise and incorporating effect an adaptive receiver.

In recent years, it has been established that the adverse effects of nonlinear interference noise (NLIN) can be mitigated using adaptive equalization methods. As such, a wide variety methods have used to treat nonlinearity, in different transmission scenarios. This paper reviews principles out-of-band nonlinearity mitigation equalization. Statistical properties NLIN exploited for are discussed, as well cost and benefit various types equalizers. particular we describe equivalence between...

Photonic spectral processors based on waveguide grating routers (WGR) having ~1GHz resolution are developed for flexible sub-band add/drop with an LCoS SLM. We describe means correcting the WGR's phase errors, which inherent due to extremely long delays.

We present an analytical model which predicts the statistical properties of nonlinear interference noise (NLIN) in fiber links are affected by polarization dependent loss (PDL). The enables to investigate many PDL scenarios a computationally efficient way, reducing need run costly split-step Fourier simulations. Using this model, we show that features NLIN, such as its phase and rotation time-varying intersymbol interference, may be significantly modified components link.

We review the main propagation effects that take place in fibers for Space-Division Multiplexing, focusing on their impact system performance. specifically address interplay between modal dispersion (MD) and nonlinear distortions, show increase coherent MIMO-DSP complexity implied by MD is balanced a MD-induced mitigation of distortions.

Spectrally dispersed light from a fine resolution AWG is spectrally filtered at ~1 GHz with an SLM. phase errors were permanently trimmed waveguide-by-waveguide excimer laser by inducing stress in the glass.

We demonstrate a method for experimentally characterizing the time-evolution statistics of nonlinear interference noise (NLIN). Strong temporal correlations, beyond phase-noise NLIN component, are measured experimentally, first time. The ability measuring these correlation is imperative designing effective mitigation schemes.

We generate transform limited WDM optical sampling pulse streams, as an alternative to time stretched in photonically assisted analog digital conversion applications. A single LCoS processor compresses and retimes user selectable bandwidths from short source.

Photonically-Sampled analog-to-digital conversion utilizing a spatial oversampling technique is described and experimentally demonstrated. Spatial oversampling's ability to boost the ADC's resolution verified. Digitization of 13GHz signal with 6.3 ENOB

We investigate the potential of adaptive equalization techniques to mitigate intra-channel nonlinear interference noise (NLIN). develop an equalizer tailored for NLIN reduction, based on Kalman filtering and maximum likelihood sequence estimation (MLSE).

We generate transform-limited WDM optical sampling pulse bursts by filtering ultrashort pulses from a mode-locked laser. A phase spatial light modulator (SLM) is used in biased shaper to circumvent the need modulate with 2π wraps, which are known limit response. The arrangement compresses and retimes user-selectable bandwidths short source precise control of bandwidth, stream rates, duty cycle.

We present a fully analytic study of the nonlinear interference noise (NLIN) in SDM systems. Our approach is based on generalization to case mode-multiplexed systems tools that have been recently developed for NLIN standard single-mode The presented model shown yield simple expressions relating power and information capacity number propagating modes.