Read Books Online and Download eBooks, EPub, PDF, Mobi, Kindle, Text Full Free.
Multiple Wavelength Laser Utilizing Hybrid Erbuim And Brillouin Gains In Dispersion Compensating Fiber
Download Multiple Wavelength Laser Utilizing Hybrid Erbuim And Brillouin Gains In Dispersion Compensating Fiber full books in PDF, epub, and Kindle. Read online Multiple Wavelength Laser Utilizing Hybrid Erbuim And Brillouin Gains In Dispersion Compensating Fiber ebook anywhere anytime directly on your device. Fast Download speed and no annoying ads. We cannot guarantee that every ebooks is available!
Book Synopsis Multiple Wavelength Laser Utilizing Hybrid Erbuim and Brillouin Gains in Dispersion Compensating Fiber by : Mohammed Ajiya
Download or read book Multiple Wavelength Laser Utilizing Hybrid Erbuim and Brillouin Gains in Dispersion Compensating Fiber written by Mohammed Ajiya and published by . This book was released on 2010 with total page 302 pages. Available in PDF, EPUB and Kindle. Book excerpt: This dissertation presents experimental design and development of multiwavelength fiber laser sources utilizing hybrid erbium and Brillouin gains in dispersion compensating fiber. Four laser designs have been successfully demonstrated. Also presented is a simple method of stimulated Brillouin scattering threshold (SBS) reduction.Highly stable multiwavelength Brillouin/erbium fiber laser (MWBEFL) in which the cavity is formed by a virtual mirror, where the oscillating modes are reflected back into the laser cavity by SBS effect rather than by a physical reflector is demonstrated. The issue of low tuning range associated with such laser configurations was successfully resolved. Tuning range of 39 nm from 1527 to 1566 nm, which is only limited by the amplification bandwidth of the erbium gain was successfully achieved. At maximum pumping powers, four channels that are rigidly separated by 0.08 nm (10 GHz) and where each has power above 0 dBm has been demonstrated. Simple method of SBS threshold reduction was demonstrated. The BP signal was recycled back into the fiber thereby increasing the total gain in the fiber and thus SBS threshold was reduced. In a 5 km long fiber, the proposed method reduced SBS threshold by over 48%, from 16.5 mW to 8.5 mW of the input signal. The Brillouin Stokes generated in the 5 km fiber has a peak power of 9.2 dBm against 4.3 dBm measured using the conventional technique. Similarly, the results obtained from the various lengths of tested fibers, proved that the proposed technique significantly reduced the SBS threshold value and improved the level of the Brillouin Stokes signal power. Two structures of MWBEFL incorporating the SBS threshold reduction technique were also proposed. In one structure, unidirectional propagation of both the Brillouin Stokes and the Brillouin pump signals was allowed through the erbium amplifier while in the other, bidirectional propagation of the two signals are forced through the erbium gain. The unidirectional amplifier configuration provides greater tuning range of 46.8 nm, against 23 nm provided by the bidirectional configuration at the same pumping powers. On the other hand, the bidirectional amplifier configuration provides 13 output channels against only 6 output channels obtained from the unidirectional amplifier configuration under maximum pumping powers. The channels output power however remained lower than 0 dBm in both cases. An enhanced structure of MWBEFL that provided flawless tuning range and high channels power was also demonstrated. At maximum pumping powers, up to seven output channels that can broadly be tuned over 35 nm, are demonstrated. Wavelength tunability is also limited by the amplification bandwidth of the erbium amplifier employed. Each of the initial four channels has peak power above 1.6 dBm with the first and seventh channels having a peak power of 8.19 dBm and -8.30 dBm respectively. After an observation period of one hour, the average power fluctuations by all the seven channels is only 1.47 dB with average wavelength shifts of 0.007 nm.
Book Synopsis Design and Development of a Multi-wavelength Brillouin/erbium Long-band Fabry Perot Fiber Laser by : Tarak Ali Haddud
Download or read book Design and Development of a Multi-wavelength Brillouin/erbium Long-band Fabry Perot Fiber Laser written by Tarak Ali Haddud and published by . This book was released on 2004 with total page 144 pages. Available in PDF, EPUB and Kindle. Book excerpt: Multi-wavelength fiber lasers operating in the long-wavelength band (L-band) wavelength region are needed as laser source for applications such as wavelength-divison-multiplexed (WDM) communication systems, fiber sensors, spectroscopy and fiber optical fiber gyroscopes. Multi-wavelength fiber laser are emerging as attractive alternative technologies for wavelength-selectable WDM. They are used as source for direct compatibility with the fiber-optic transmission medium, excellent amplifying properties of rare-earth doped fibers, Brillouin gain, rapidly contiuing progress in novel fiber gain media, maturity and robustness of the laser diode pumps used and availability of fiber-based components. The multi-wavelength laser applications of interest to this work have distinct performance requirement. This requirement is the need for wide tunability (the ability to tune the lasing emissio through a wide range of wavelength). In this thesis, the design and development of a multi channel continous wave Brillouin/Erbium L-band fiber laser (BEFL), with a novel loop mirror configurations, has been studied experimentally. The design parameters of multi-wavelength fiber laser (launched pump powers , single mode optical fiber lengths and Brillouin wavelengths0, the multi wavelength Brillouin/erbium linear fiber laser configuration with bi-directional pumping is demonstrated. Throughout this work diffreent lengths of single mode optical fiber with various launched pump powers and Brillouin wavelengths have been examined to extract the optimum output performance of a BEFL. The performance of the BEFL is presented in terms of threshold pump power, output peak power, tuning range and the number od Stokes. This development fiber loop configuration exhibits considerably high performance. Twenty-four of Stokes with 10 nm tuning range and efficient output powers were obtained.
Book Synopsis Design and Development of a Novel Multiwavelength Brillouin-erbium Fiber Laser by : Mohammed Hayder Al-Mansoori
Download or read book Design and Development of a Novel Multiwavelength Brillouin-erbium Fiber Laser written by Mohammed Hayder Al-Mansoori and published by . This book was released on 2004 with total page 202 pages. Available in PDF, EPUB and Kindle. Book excerpt: Multi-wavelength laser sources with constant wavelength spacing are of great interest in dense wavelength division multiplexing (DWDM) communication and sensors system. As the transmission capacity of optical communication systems is approaching a few Tb/s WDM method in recent years, multiwavelength generation technology becomes more important, considering that the complexity and the cost of the source will increase as the number od WDM channel increases. In this thesis, the design and development of a novel architecture of multi-wavelength Brilloui/Erbium fiber laser (BEFL) utilizing a linear cavity fiber loop technique is presented. Simultaneous and stable multiple wavelength lasing in a linear cavity have been achieved. The results are based completely on the experimental work. The requirement of internal feedback that is commonly used for multiple wavelengths Brillouin/Erbium fiber laser using a ring configuration is achieved by the proposed linear cavity design. This design used only a single 980 nm pump laser for its multiple wavelengths operation. Based on the design parameters namely: 980 nm pump power, Brillouin pump wavelength and single mode fiber (SMF) the performance of a novel BEFL is presented in terms of threshold power, Stokes signal peak power, number of Stokes generated , stability of the Stokes and tuningr range. Throughout this work, three lengths of SMF-fiber are used, 1.9 km, 8.8 km and 25 km. The optimization of Brillouin pump wavelength, power and Erbium gain led to a maximum possible number of Stokes. Twenty-two stable output laser lines with 10.88 GHz (0.088 nm) line spacing were obtained at 1558 nm that was the peak of Erbium-doped fiber (EDF). The injected Brillouin pump power into the 8.8 km SMF-fiber was set at 0.9 dBm and the EDF was pumped by 100 mW of 980 nm pump laser. The most efficient cascaded Brillouin Stokes operation occured at the peak of Erbium gain centered on 1558 nm. The number of Stokes decreased as the Brillouin pump increased in the highest region of Erbium gain. On the contratry, the number of Stokes was proportional to the intensity of the Brillouin pump power outside this wavelenght range. The best performance and conversion efficiency of Brillouin pump to the BEFL signal occur at the lower levels of injected Brillouin pump power. A low threshold of 4 mW pump power with 2.3 mW launched Brillouin pump into the 8.8 km of SMF-fiber at 1558 nm was obtained. The tuning range of the Stokes signal must be taken into account both the Brillouin and EDF pump power, at a fixed EDF pump power the Stokes signal can be tuned wider at a higher Brillouin pump power while higher EDF pump power produces smaller tuning range.
Book Synopsis All-optical Generation of Multiwavelength Brillouin-erbium Fiber Laser in Long-wavelength Band by : Mohammed Hayder Al-Mansoori
Download or read book All-optical Generation of Multiwavelength Brillouin-erbium Fiber Laser in Long-wavelength Band written by Mohammed Hayder Al-Mansoori and published by . This book was released on 2008 with total page 460 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this dissertation, the design and development of the multiwavelength Brillouin-Erbium fiber laser (BEFL) sources operating in the L-band transmission window is presented and characterized. Four different laser designs have been successfully demonstrated using a combination of stimulated Brillouin scattering effect in optical fiber and Erbium-doped fiber (EDF) amplification. The experimental results obtained from the characterization and optimization of these laser structures are the threshold power, number of the Stokes signals generated, Stokes signals power, self-lasing oscillation and the tuning range. The results are taken from the studies which have been carried out to analyze the effects of 1480 nm pump power, Brillouin pump (BP) power, BP wavelength and single mode fiber (SMF) length. The first laser structure is an efficient multiwavelength L-band BEFL pumped by a 1480 nm pump laser in a linear cavity configuration with direct BP injection into SMF. The issue of low gain efficiency of the L-band in the EDF lasers is resolved with the efficient linear cavity structure and the 1480 nm pumping scheme. The proposed laser structure exhibits a low threshold power of 18 mW and a maximum number of 26 stable output channels with 0.089 nm (10.5 GHz) channels spacing. The second and third laser structures are focused on the enhanced multiwavelength BEFL, in which the BP power is pre-amplified before entering the SMF within the laser cavity. The BP pre-amplification techniques - single pass and double pass represent a new mode of operation of multiwavelength BEFL's. This intra-cavity BP pre-amplification provided by the EDF has created higher intensity of Brillouin Stokes signals generated in the single-mode fiber that leads to the homogenous gain saturation. This effect is able to suppress the built-up of the self-lasing cavity modes in a wider wavelength range and the number of output channels is also enhanced as compared to the conventional BP direct injection. Output of more than 33 laser channels is achieved and the tuning range is almost doubled than that of the conventional BP direct injection technique. Finally, for the fourth laser configuration, the multiwavelength BEFL incorporates either the amplified fiber loop mirror (AFLM) or non-linear amplified fiber loop mirror filter (AFLMF). Fifty-four stable output channels, with 0.089 nm channels spacing, have been achieved. A non-linear AFLMF which induces wavelength-dependent cavity loss and serves as an amplitude equalizer is employed to shift and flatten the EDF gain spectrum. Two control mechanisms have been demonstrated to shift and flatten the EDF gain profile through the adjustment of the polarization controller in the AFLMF. Therefore, the multiwavelength BEFL could be tuned over the whole L-band window from 1570 nm to 1610 nm with the average number of 24 output channels. In addition, flattening the EDF laser oscillation overcomes the requirements of the BP wavelength tuning, in conjunction with the adjustment of the polarization controllers in the fiber loop.
Book Synopsis Multi-wavelength fiber laser light sources based on Erbium and Brillouin gain by : Suhairi Saharudin
Download or read book Multi-wavelength fiber laser light sources based on Erbium and Brillouin gain written by Suhairi Saharudin and published by . This book was released on 2006 with total page 484 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Pulsed Fiber Lasers written by Peter Adel and published by Cuvillier Verlag. This book was released on 2004 with total page 170 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Multi-wavelength Brillouin-erbium Fiber Laser Utilizing Bismuth-oxide Erbium Doped Fiber Incorporating High and Low Nonlinear Fibers by : Ramzia Salem
Download or read book Multi-wavelength Brillouin-erbium Fiber Laser Utilizing Bismuth-oxide Erbium Doped Fiber Incorporating High and Low Nonlinear Fibers written by Ramzia Salem and published by . This book was released on 2011 with total page 318 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Multiwavelength Brillouin Semiconductor Fiber Lasers by : Alaa Hayder
Download or read book Multiwavelength Brillouin Semiconductor Fiber Lasers written by Alaa Hayder and published by . This book was released on 2008 with total page 206 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis 2001 Conference on Lasers and Electro-Optics by :
Download or read book 2001 Conference on Lasers and Electro-Optics written by and published by Institute of Electrical & Electronics Engineers(IEEE). This book was released on 2001 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt: This text presents information on electro-optic devices.
Book Synopsis Tunable Multiwavelength Brillouin Erbium Fiber Laser Designs for High Capacity Optical Communication System by : Abdulmoghni Ali Waza'a Al-Alimi
Download or read book Tunable Multiwavelength Brillouin Erbium Fiber Laser Designs for High Capacity Optical Communication System written by Abdulmoghni Ali Waza'a Al-Alimi and published by . This book was released on 2014 with total page 280 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Investigation of Multi-wavelength Brillouin Laser Generation Using Single Mode Fiber and Bismuth-based Erbium-doped Fiber by : Halimatun Saadiah Abu Bakar
Download or read book Investigation of Multi-wavelength Brillouin Laser Generation Using Single Mode Fiber and Bismuth-based Erbium-doped Fiber written by Halimatun Saadiah Abu Bakar and published by . This book was released on 2010 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Multi-wavelength Laser Operation and Pulse Propagation Using Nonlinear Fibers by : Zhe Chen
Download or read book Multi-wavelength Laser Operation and Pulse Propagation Using Nonlinear Fibers written by Zhe Chen and published by . This book was released on 2010 with total page 250 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Optics Letters written by and published by . This book was released on 2007 with total page 640 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Ultra-Fast Fiber Lasers by : Le Nguyen Binh
Download or read book Ultra-Fast Fiber Lasers written by Le Nguyen Binh and published by CRC Press. This book was released on 2010-07-19 with total page 441 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ultrashort pulses in mode-locked lasers are receiving focused attention from researchers looking to apply them in a variety of fields, from optical clock technology to measurements of the fundamental constants of nature and ultrahigh-speed optical communications. Ultrashort pulses are especially important for the next generation of ultrahigh-speed optical systems and networks operating at 100 Gbps per carrier. Ultra Fast Fiber Lasers: Principles and Applications with MATLAB® Models is a self-contained reference for engineers and others in the fields of applied photonics and optical communications. Covering both fundamentals and advanced research, this book includes both theoretical and experimental results. MATLAB files are included to provide a basic grounding in the simulation of the generation of short pulses and the propagation or circulation around nonlinear fiber rings. With its unique and extensive content, this volume— Covers fundamental principles involved in the generation of ultrashort pulses employing fiber ring lasers, particularly those that incorporate active optical modulators of amplitude or phase types Presents experimental techniques for the generation, detection, and characterization of ultrashort pulse sequences derived from several current schemes Describes the multiplication of ultrashort pulse sequences using the Talbot diffraction effects in the time domain via the use of highly dispersive media Discusses developments of multiple short pulses in the form of solitons binding together by phase states Elucidates the generation of short pulse sequences and multiple wavelength channels from a single fiber laser The most practical short pulse sources are always found in the form of guided wave photonic structures. This minimizes problems with alignment and eases coupling into fiber transmission systems. In meeting these requirements, fiber ring lasers operating in active mode serve well as suitable ultrashort pulse sources. It is only a matter of time before scientists building on this research develop the practical and easy-to-use applications that will make ultrahigh-speed optical systems universally available.
Book Synopsis Passively Mode-locked Erbium-doped Fiber Lasers Using Multiple Quantum Well Saturable Absorbers by : Michael Joseph Hayduk
Download or read book Passively Mode-locked Erbium-doped Fiber Lasers Using Multiple Quantum Well Saturable Absorbers written by Michael Joseph Hayduk and published by . This book was released on 1997 with total page 298 pages. Available in PDF, EPUB and Kindle. Book excerpt: An experimental study of the mode-locking process in erbium-doped fiber lasers (EDFL's) operating at 1.55 microns using multiple quantum well saturable absorbers is presented. The self-starting passively mode-locked laser was constructed in a Fabry-Perot configuration using the saturable absorber as the back reflector of the cavity. Picosecond pulses that range from 14.2 to 38.8 ps were generated using a series of saturable absorbers. The pulse widths were dependent upon the optical properties of the saturable absorber used as the mode-locking element. The output power of the EDFL varied from 0.2 to 6.7 mW and was also dependent upon the saturable absorber used in the cavity. Soliton mode-locking using saturable absorbers was the mechanism responsible for the generation of the picosecond pulses by the EDFL. The long-lived carrier lifetime in the quantum wells was the primary optical property of the saturable shorter that determined the final pulse width.
Book Synopsis Multi-wavelength Brillouin Fiber Laser Using of Photonic Crystal Fiber as a Gain Medium by : Norazlina Saidin
Download or read book Multi-wavelength Brillouin Fiber Laser Using of Photonic Crystal Fiber as a Gain Medium written by Norazlina Saidin and published by . This book was released on 2009 with total page 120 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Multiwavelength Brillouin/erbium Fiber Laser Assisted by Bismuth-based Erbium-doped Fiber Amplifier by : Nurul Shahrizan Shahabuddin
Download or read book Multiwavelength Brillouin/erbium Fiber Laser Assisted by Bismuth-based Erbium-doped Fiber Amplifier written by Nurul Shahrizan Shahabuddin and published by . This book was released on 2009 with total page 260 pages. Available in PDF, EPUB and Kindle. Book excerpt:
