* The only book describing applications of nonlinear fiber optics * Two new chapters on the latest developments: highly nonlinear fibers and quantum applications* Coverage of biomedical applications* Problems provided at the end of each chapterThe development of new highly nonlinear fibers - referred to as microstructured fibers, holey fibers and photonic crystal fibers - is the next generation technology for all-optical signal processing and biomedical applications. This new edition has been thoroughly updated to incorporate these key technology developments.The book presents sound coverage of the fundamentals of lightwave technology, along with material on pulse compression techniques and rare-earth-doped fiber amplifiers and lasers. The extensively revised chapters include information on fiber-optic communication systems and the ultrafast signal processing techniques that make use of nonlinear phenomena in optical fibers.New material focuses on the applications of highly nonlinear fibers in areas ranging from wavelength laser tuning and nonlinear spectroscopy to biomedical imaging and frequency metrology. Technologies such as quantum cryptography, quantum computing, and quantum communications are also covered in a new chapter.This book will be an ideal reference for: RD scientists involved with research on fiber amplifiers and lasers; graduate students and researchers working in the fields of optical communications and quantum information. * The only book on how to develop nonlinear fiber optic applications* Two new chapters on the latest developments; Highly Nonlinear Fibers and Quantum Applications* Coverage of biomedical applications

Applications of nonlinear fiber optics

This paper presents a detailed theoretical and experimental study of the impact of amplified spontaneous emission (ASE) on self-phase modulation in semiconductor optical amplifiers (SOAs). A theoretical model of pulse propagation in SOAs is developed that includes the ASE power and its effect on gain-saturation and gain-recovery. We study the impact of ASE on the nonlinear phase shift, frequency chirp, spectrum, and shape of amplified picosecond pulses at a range of drive currents. We verify our predictions experimentally by launching gain-switched picosecond pulses with 3-mW peak power into a commercial SOA exhibiting 9-ps gain-recovery time at a current of 500 mA. Understanding the impact of ASE on SOAs is important for applications that employs SOAs for all-optical signal processing and as data-network amplifiers.

Self-Phase Modulation in Semiconductor Optical Amplifiers: Impact of Amplified Spontaneous Emission

The feasibility of realizing an all-optical XNOR gate for 160 Gb/s return-to-zero data pulses by using for the first time a single quantum-dot semiconductor optical amplifier (QD-SOA)-based Mach–Zehnder interferometer (MZI) is theoretically investigated and demonstrated. The proposed scheme differs from the usually employed ones in the way the MZI configuration is exploited. This consists in combining the data streams between which the XNOR logic is to be executed and launching them together into the QD-SOA of one MZI arm. The QD-SOA in the other MZI arm is constantly driven by an auxiliary signal that comprises of continuous pulses. By conducting numerical simulation, the impact of the active input signals and QD-SOA characteristics on the profile of the logically produced pulses is thoroughly explored and evaluated. This design procedure allows to specify the requirements that the critical performance parameters must satisfy and make a suitable choice of their values so that the outcome of the XNOR gate at the target data rate and format is both logically correct and of high quality.

Proposal for ultrafast all-optical XNOR gate using single quantum-dot semiconductor optical amplifier-based Mach–Zehnder interferometer

The first € price and the £ and $ price are net prices, subject to local VAT. Prices indicated with * include VAT for books; the €(D) includes 7% for Germany, the €(A) includes 10% for Austria. Prices indicated with ** include VAT for electronic products; 19% for Germany, 20% for Austria. All prices exclusive of carriage charges. Prices and other details are subject to change without notice. All errors and omissions excepted. B. Lingnau Nonlinear and Nonequilibrium Dynamics of Quantum-Dot Optoelectronic Devices

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Nonlinear and Nonequilibrium Dynamics of Quantum-Dot Optoelectronic Devices

We study, theoretically and experimentally, interband four-wave mixing in semiconductor optical amplifiers whose gain recovery is accelerated by amplified spontaneous emission (ASE). Across a broad range of wavelength shifts, we observe a considerable increase (over 20 dB) in the conversion efficiency, and a corresponding increase in the optical SNR (over 12 dB), as the device current is increased from 100 to 500 mA. For input pump powers below 1 mW, gain recovery in our device is dominated by internal ASE. Higher pump power levels reduce the conversion efficiency because of the pump-induced gain saturation near the output end. We show that wavelength shifts of up to 25 nm are possible, while maintaining a >;10% conversion efficiency and a high optical SNR (>;25 dB). A major advantage of our scheme is that the use of relatively low pump powers (<; 1 mW) reduces the electrical power consumption for such wavelength converters by more than a factor of 10. We discuss in detail the issue of optimum pump and signal powers. Our study is useful for realizing energy-efficient, modulation-format transparent, wavelength converters for optical networks.

Interband Four-Wave Mixing in Semiconductor Optical Amplifiers With ASE-Enhanced Gain Recovery

We investigate experimentally the self-phase modulation (SPM) induced by gain dynamics on picosecond pulses in semiconductor optical amplifiers whose gain recovery is enhanced by amplified spontaneous emission (ASE). The observed pulse spectra are highly asymmetric at low drive currents but become more symmetric with increasing current, owing to the ASE-induced reduction in the gain-recovery time down to 9 ps. Furthermore, the amount of spectral broadening is shown to saturate with drive current. We show that a variety of spectral-lobe strengths is selectable, while maintaining a nearly constant small-signal gain, a feature desirable for all-optical signal processing applications.

Aaron M. Kaplan

Papers

Self-Phase Modulation in Semiconductor Optical Amplifiers: Impact of Amplified Spontaneous Emission

Spectral broadening in ultrafast semiconductor optical amplifiers induced by gain dynamics and self-phase modulation