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Book Analysis of Four Wave Mixing in Semiconductor Optical Amplifier

Download or read book Analysis of Four Wave Mixing in Semiconductor Optical Amplifier written by Sadiq Kadhim and published by LAP Lambert Academic Publishing. This book was released on 2013 with total page 160 pages. Available in PDF, EPUB and Kindle. Book excerpt: A theoretical model for analyzing the combined effects of amplified spontaneous emission (ASE) and intraband process on the propagation of pulses through SOA is presented. An analysis for the differential equations and the related parameters that describe the self phase modulation SPM in SOA is presented. Moreover, the effects of these variations on the pulse shape and spectrum is explained. A method for driving the coupled propagation equations of the FWM process in SOA (for the case of the pump-probe configuration) is proposed, which can be extended to find the propagation equations of any number of signals. SOA is divided theoretically into many segments in longitudinal z direction, so that the pump power change in each segment can be considered very small, this leads to solving the coupled propagation equations analytically.

Book Four Wave Mixing in Semiconductor Optical Amplifiers and Erbium Doped Fiber Lasers

Download or read book Four Wave Mixing in Semiconductor Optical Amplifiers and Erbium Doped Fiber Lasers written by Chiming Wu and published by . This book was released on 1999 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Four Wave Mixing (FWM) in a semiconductor optical amplifier (SOA) is a third order nonlinear effect, which has various potential applications in high-speed optical communication systems. Continuous-wave (CW) FWM in a 2-section SOA has been experimentally studied. The carrier density modulation and nonlinear gain effects in the semiconductor optical amplifier contribute to the generation of the FWM. A theoretical model of CW FWM and frequency response of FWM using small signal analysis has been developed. Bandwidth of the FWM has been obtained for the first time. Pulsed FWM in the 2-section SOA has also been studied and analyzed. Optical time-division demultiplexing and wavelength conversion using the FWM in the SOA has been demonstrated for optical communication. A tunable Erbium doped fiber laser, which is preferred in the FWM experiments and is potentially an important source for high speed optical communication, has also been investigated. The tunability of the fiber laser is about 40 nm for both CW and mode-locking cases. Actively harmonic mode-locking which happens when the modulation frequency fm = n fc (fc is the fundamental cavity frequency) and rational harmonic mode-locking which happens when fm = (n + 1/p)fc (n, p are both integers) have been studied and analyzed. 22nd order of rational harmonic mode-locking was observed when f m 1 GHz, which is the highest order of rational harmonic mode-locking ever reported. 40 GHz pulse train with pulse width âˆ1⁄47 ps was achieved using rational harmonic mode-locking technique when f m 10 GHz. Stabilization of the mode-locked Er-doped fiber laser with a semiconductor optical amplifier in the cavity has also been studied. The semiconductor optical amplifier contributes in removing the supermode noise and stabilizing the optical pulses.

Book Four Wave Mixing in a Highly Nonlinear Media

Download or read book Four Wave Mixing in a Highly Nonlinear Media written by Noor Azura Awang and published by LAP Lambert Academic Publishing. This book was released on 2014-02 with total page 304 pages. Available in PDF, EPUB and Kindle. Book excerpt: This work presents a comprehensive study of the four wave mixing (FWM) effect in the highly nonlinear fibre (HNLF) and semiconductor optical amplifier (SOA); and their applications. The nonlinearity parameters such as zero-dispersion wavelength (ZDW), chromatic dispersion (CD) and nonlinear coefficient of HNLF has successfully investigated by using several FWM techniques. Results from all techniques have been achieved approximately similar to the manufacturer specification. This technique is then employed for the measurement of the FWM power and FWM efficiency in a SOA, in addition to the gain performance, which is measured using conventional methods. Based on these parameters, a good agreement between experiments and numerical has been obtained. This characterization is important for nonlinear application such as wavelength conversion, fibre optic parametric amplifier (FOPA) and multiwavelength fibre laser. Wavelength conversion is a key for wavelength division multiplexed (WDM) networks. Wavelength converter based on HNLF and SOA are promising candidates for implementing wavelength conversion.

Book Optical Demultiplexing Based on Four Wave Mixing in Semiconductor Optical Amplifiers

Download or read book Optical Demultiplexing Based on Four Wave Mixing in Semiconductor Optical Amplifiers written by Narottam Das and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Optical Demultiplexing Based on Four-Wave Mixing in Semiconductor Optical Amplifiers.

Book Efficient Wavelength Conversion Using Four Wave Mixing in Semiconductor Optical Amplifier for Intensity Modulated Differential Phase Shift Keying Signal

Download or read book Efficient Wavelength Conversion Using Four Wave Mixing in Semiconductor Optical Amplifier for Intensity Modulated Differential Phase Shift Keying Signal written by Yousuf Khambaty and published by . This book was released on 2008 with total page 244 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book All optical Wavelength Conversion Based on Cross Gain Modulation and Four wave Mixing in Semiconductor Optical Amplifiers

Download or read book All optical Wavelength Conversion Based on Cross Gain Modulation and Four wave Mixing in Semiconductor Optical Amplifiers written by Kristof Obermann and published by . This book was released on 1999 with total page 192 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Wavelength Conversion Using Four wave Mixing in Semiconductor Optical Amplifiers for Broadband Optical Networks

Download or read book Wavelength Conversion Using Four wave Mixing in Semiconductor Optical Amplifiers for Broadband Optical Networks written by Trefor John Morgan and published by . This book was released on 1999 with total page 192 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Wavelength Converters Based on Four wave Mixing in Semiconductor Optical Amplifiers for Advanced Modulation Formats

Download or read book Wavelength Converters Based on Four wave Mixing in Semiconductor Optical Amplifiers for Advanced Modulation Formats written by Benoît Filion (Chercheur) and published by . This book was released on 2016 with total page 119 pages. Available in PDF, EPUB and Kindle. Book excerpt: Wavelength converters are essential building blocks of future all-optical wavelength-routed optical networks. Wavelength converters based on four-wave mixing in semiconductor optical amplifiers have been proposed since they possess many of the features required for the implementation of such networks. In the literature, they have been extensively studied in the context of direct detection optical communication systems. With the recent emergence of commercial coherent systems together with the advances in digital signal processing, there is an imperative need to study the performance of wavelength converters for advanced modulation formats. The objective of this thesis is to investigate the feasibility of wavelength converters based on four-wave mixing in semiconductor optical amplifiers for advanced modulation formats and subsequently propose a digital signal processing technique that aims to improve their performance. An experimental investigation of m-ary quadrature amplitude modulation (QAM) wavelength conversion is first performed. In particular, wideband wavelength conversion of 10 Gbaud 16-QAM and, for the first time, 5 Gbaud 64-QAM signals is successfully achieved over the whole C-band using a commercial semiconductor optical amplifier. The results show that the induced nonlinear distortions on the wavelength converted signal lead to a different optimal wavelength converter operating condition compared to wavelength conversion of intensity modulation formats. For wavelength conversion of advanced modulation formats, the tradeoff between the wavelength converted signal power and the nonlinearities dictates the optimal wavelength converters operating condition. The digital signal processing capabilities of coherent receivers renders possible the compensation of the signal impairments in the digital domain after detection. Making use of this, a digital post-compensation technique based on a small-signal analysis of the equations governing the gain dynamics of semiconductor optical amplifiers is developed in order to mitigate the nonlinear distortions imposed on the wavelength converted signal. The proof of concept is realized both via numerical simulations and experimental measurements of 10 Gbaud 16-QAM and 5 Gbaud 64-QAM: the post-compensation technique significantly improve the wavelength converter especially in the case of high-order advanced modulation formats such as 64-QAM. Finally, a thorough experimental investigation of the post-compensation technique performance for 5 Gbaud 64-QAM wavelength conversion is done. The results indicate that the signal quality is still improved even in the presence of a noisy signal at the wavelength converter input. Furthermore, it is shown that the optimal wavelength converter operating condition varies upon the amount of optical loss that follows. In a wavelength-routed optical network, the signal will likely pass through multiple wavelength conversion stages. The experimental investigation is extended to cascaded wavelength conversion stages and, for the first time, dual stage wavelength conversion of 5 Gbaud 64-QAM signal is performed. In this context, the proposed post-compensation technique still successfully improves the wavelength converter performance. The results of this thesis strongly suggest that wavelength converters based on four-wave mixing in semiconductor optical amplifiers, together with the use of digital signal processing techniques, is a promising candidate for advanced modulation formats wavelength conversion in future wavelength routed optical networks.

Book Advances in Optical Amplifiers

Download or read book Advances in Optical Amplifiers written by Paul Urquhart and published by BoD – Books on Demand. This book was released on 2011-02-14 with total page 456 pages. Available in PDF, EPUB and Kindle. Book excerpt: Optical amplifiers play a central role in all categories of fibre communications systems and networks. By compensating for the losses exerted by the transmission medium and the components through which the signals pass, they reduce the need for expensive and slow optical-electrical-optical conversion. The photonic gain media, which are normally based on glass- or semiconductor-based waveguides, can amplify many high speed wavelength division multiplexed channels simultaneously. Recent research has also concentrated on wavelength conversion, switching, demultiplexing in the time domain and other enhanced functions. Advances in Optical Amplifiers presents up to date results on amplifier performance, along with explanations of their relevance, from leading researchers in the field. Its chapters cover amplifiers based on rare earth doped fibres and waveguides, stimulated Raman scattering, nonlinear parametric processes and semiconductor media. Wavelength conversion and other enhanced signal processing functions are also considered in depth. This book is targeted at research, development and design engineers from teams in manufacturing industry, academia and telecommunications service operators.

Book Advances in Optical Amplifiers

Download or read book Advances in Optical Amplifiers written by Paul Urquhart and published by IntechOpen. This book was released on 2011-02-14 with total page 454 pages. Available in PDF, EPUB and Kindle. Book excerpt: Optical amplifiers play a central role in all categories of fibre communications systems and networks. By compensating for the losses exerted by the transmission medium and the components through which the signals pass, they reduce the need for expensive and slow optical-electrical-optical conversion. The photonic gain media, which are normally based on glass- or semiconductor-based waveguides, can amplify many high speed wavelength division multiplexed channels simultaneously. Recent research has also concentrated on wavelength conversion, switching, demultiplexing in the time domain and other enhanced functions. Advances in Optical Amplifiers presents up to date results on amplifier performance, along with explanations of their relevance, from leading researchers in the field. Its chapters cover amplifiers based on rare earth doped fibres and waveguides, stimulated Raman scattering, nonlinear parametric processes and semiconductor media. Wavelength conversion and other enhanced signal processing functions are also considered in depth. This book is targeted at research, development and design engineers from teams in manufacturing industry, academia and telecommunications service operators.