Abstract A novel optical switching technique based on two symmetrically coupled semiconductor amplifiers operating in reverse‐bias mode is proposed and experimentally demonstrated. The device produces both noninverted inverted hysteresis behavior with speed MHz range. However, switch performance can be improved by implementing this a photonic integrated circuit. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52:2753–2759, 2010; View article online at wileyonlinelibrary.com. DOI...

We report a novel, to the best of our knowledge, all-optical discrete multilevel time-lens (DM-TL) design based on cross-phase modulation (XPM). In this approach, pump is synthesized such as quadratic phase applied probe in constant-level time-bins with maximum excursion 2π. As result, considerable reduction required power achieved comparison conventional approach parabolic pump. To illustrate concept, proposed DM-TL here energy-preserving conversion continuous-wave (CW) signal into train...

This paper presents a novel optical leaky integrator for an all-optical A/D converter based-on sigma-delta modulation. The device consists of two main components: fiber ring resonator (FRR) and wavelength converter. FRR comprises SOA filter that defines the resonance λ₂. modulated input signal, at λ₁, changes gain loop through cross-gain modulation (XGM) thus modifies accumulation. A theoretical model system is developed accounts critical design parameters...

We propose an all-optical temporal Talbot array illuminator (T-TAI) enabling denoising passive amplification of broadband ( <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"><tex-math notation="LaTeX">$&gt;$</tex-math></inline-formula> 10 GHz-bandwidth) optical signals. The key element is ultra-fast phase grating based on cross-phase modulation. Whereas previous implementations the T-TAI suffer from bandwidth limitations inherent to...

Abstract Decimation is a common process in digital signal processing that involves reducing the sampling rate of an oversampled by linearly combining consecutive samples. Among other applications, this represents simple means to mitigate noise content signal. In work, novel optical concept inspired these operations proposed, which called Parametric‐assisted Oversampling and (POD). By using all‐fiber setup, POD processor first realizes ultra‐fast parametric oversampling incoming temporal (at...

Abstract This paper describes a novel optical leaky integrator for an all‐optical Σ−Δ modulator. The device is designed and built in non‐interferometric structure, which consists of nonlinear fiber loop wavelength converter. system characterized square input signals MHz range. integration time‐constant the can be easily adjusted over full interval period by modifying semiconductor amplifier driving current. Experimental results are excellent agreement with numerical simulations used to...

A novel photonic analog-to-digital converter based on asynchronous first-order delta-sigma modulation (ADSM) has been theoretically investigated and experimentally demonstrated. The architecture uses an optical leaky integrator, optoelectronic bistable quantizer, positive corrective feedback for a noninterferometric implementation of the ADSM. principles proposed ADSM are mathematically modeled simulated. prototype fiber-optic system is constructed, producing nonreturn-to-zero type binary...

A novel optical inverted bistable switch based on a nonlinear fiber ring resonator (FRR) containing semiconductor amplifier (SOA) has been analyzed and experimentally demonstrated. Optical bistability is obtained due to the transmission characteristics of SOA's gain characteristics. complete theoretical analysis supporting simulations are presented. prototype demonstrated using commercial components. Experimental results show switching performance with falling times lower than 10 ns.

A novel optical inverted bistable switch based on a nonlinear fiber ring resonator (FRR), which contains semiconductor amplifier (SOA) in the loop, have been analyzed and experimentally demonstrated. The bistability phenomenon is obtained due to combined effects of transmission characteristics SOA's gain property. complete theoretical analysis supporting simulations are presented. working prototype build using commercial components. Experimental results show switching speed tens MHz with...

The temporal Radon-Wigner transform (RWT), which is the squared modulus of fractional Fourier (FRT) for a varying order p, here employed as processing tool pulses with FWHM ps-tens ps, commonly found in fiber optic transmission systems. To synthesize processed pulse, selected FRT irradiance optically produced employing photonic device that combines quadratic phase modulation and dispersive transmission. For analysis purposes, complete numerical RWT display generation, 0 < p 1, proposed to...

The delta sigma modulator (DSM) is a device which transforms the amplitude information of an analog input signal to duty cycle and frequency binary output. This device, typically employed in oversampled analog-to-digital converters, based on feedback loop includes at least one integrator quantizer forward path. In this paper, novel photonic second-order DSM proposed experimentally demonstrated. system composed two inverted leaky electro-optic quantizer. maximum around 2 MHz, limited by fiber...

A novel photonic analog-to-digital converter (ADC) based on asynchronous delta-sigma modulation technique (ADSM) has been investigated and demonstrated. The ADSM architecture utilizes leaky integrators, inverted bistable quantizer positive corrective feedback suitable for non-interferometric optical implementation. principles of the proposed 2 <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">nd</sup> -order are modeled simulated mathematically....

We present an optical waveform amplification methodology combining parametric and denoising passive through all-fiber oversampling dispersion-induced decimation. demonstrate peak-to-peak gains up to 17 dB effective of MHz-bandwidth signals.

We propose a phase-only modulation-based spiral waveguide Bragg grating (WBG) design for the implementation of fully-passive and linear NOT gate. In experiments, we demonstrate inversion 50-Gbps NRZ-OOK data stream using WBG with an ultra-compact footprint 0.25 mm <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sup> .

We study the implementation of photonic filters based on waveguide Bragg gratings using a silicon nitride platform. Excellent agreement in measured coupling coefficient with theoretical predictions is observed.

A novel photonic analog-to-digital converter (ADC) based on asynchronous delta-sigma modulation (ADSM) has been investigated. The architecture utilizes an optical leaky integrator, optoelectronic bistable quantizer, and positive corrective feedback for a non-interferometric implementation of ADSM. principles the proposed 1^st –order ADSM are mathematically modeled simulated.

A novel photonic analog-to-digital convertor (ADC) based on an asynchronous delta-sigma modulator (ADSM) has been investigated and demonstrated in this paper. Because of the non-negative signal optical domain, a pseudo-positive feedback loop requires design inverted bistable quantizer, promising non-interferometric implementation. The principles proposed 1 <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">st</sup> -order 2...

An all-optic wavelength converter and pulse reshaper is proposed experimentally demonstrated. The device based on two FBG-SOA-FBG coupled-resonators in Fabry-Perot geometry producing wavelengths with rise/fall time of a few nanoseconds.