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Birefringence And Bragg Grating Control In Femtosecond Laser Written Optical Circuits
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Book Synopsis Birefringence and Bragg grating control in femtosecond laser written optical circuits by :
Download or read book Birefringence and Bragg grating control in femtosecond laser written optical circuits written by and published by Luis Andre Fernandes. This book was released on 2012-12-31 with total page 160 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this thesis, femtosecond lasers are explored for the fabrication of fiber Bragg gratings (FBGs) in suspended core fibers (SCFs) as well as direct writing of integrated optical devices in bulk fused silica glass. The FBGs fabricated in suspended core fibers with different core geometries were demonstrated with femtosecond laser exposure through a Talbot interferometer. In this case, the use of a femtosecond laser system was crucial as it eliminates the need for the use of photosensitive fibers, which is the case for SCFs, while the Talbot interferometry setup provided flexibility in the definition of the grating periodicity, while simultaneously protecting the optical components used in the fabrication process from the high intensities reached during exposure in the proximity of the fibers. These Bragg gratings were employed to show simultaneous strain and temperature sensing. Using a femtosecond laser direct writing system, novel point-by-point fabrication arrangements, with detailed attention to the computer controlled laser beam modulation, were developed in order to correctly introduce modulation of the refractive index profile during the waveguide fabrication process. This technique enabled the development of phase and frequency control required for advanced Bragg grating waveguide (BGW) fabrication and arbitrary spectral shaping. Procedures were demonstrated for the fabrication of chirped and phased shifted BGWs for applications in temporal pulse shaping and spectral shaping that showed significantly improved feature resolutions for sensing applications. The BGWs were used as a practical sensitive tool to determine and study the waveguide birefringence inherent to the nonlinear absorption processes typical of femtosecond laser-material interaction. The control of form and stress birefringence was developed in order to accomplish the fabrication of integrated optical components for polarization control, like guided wave retarders and polarization beam splitters. Tuning of this waveguide birefringence was achieved by the introduction of stress inducing laser modification tracks that enabled the ability to both enhance or reduce the inherent birefringence. Characterization techniques were developed for the absolute determination of the birefringence based on BGWs spectrum splitting, together with crossed polarizer measurements, while novel data analysis procedures were demonstrated for the study of polarization dependent and polarization independent directional couplers with the introduction of a polarization splitting ratio which is wavelength and coupling length dependent. All of the improvements made in the understanding of waveguide birefringence control provided increased flexibility to simultaneously fabricate low polarization mode dispersion circuits, as well as more efficient and compact polarization dependent devices. The polarization aspects detailed here, together with the point-by-point fabrication system, may be further developed in the future towards the fabrication of more complex integrated devices that combine spectral, temporal, and polarization control, all achievable with the same femtosecond laser writing system. These flexible processing techniques will open new directions for writing additional functionalities in optical circuits with more compact three-dimensional geometries.
Book Synopsis Polarization Manipulation in Femtosecond Laser Direct Written Waveguides in Fused Silica by : Kim Alina Lammers
Download or read book Polarization Manipulation in Femtosecond Laser Direct Written Waveguides in Fused Silica written by Kim Alina Lammers and published by . This book was released on 2022* with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Using ultrashort laser pulses to create refractive index modifications in transparent materials has become a popular method for fabricating integrated photonic circuits, since it allows three-dimensional structuring and rapid prototyping. While the precise control of the light propagation path in such laser direct written photonic circuits has been subject of numerous investigations, the control of the light's polarization has rarely been examined. At the same time, achieving full control over the light's polarization in a photonic circuit is crucial for using this degree of freedom to encode information. The goal of this theses is to demonstrate ways of achieving this polarization control in femtosecond laser direct written circuits in fused silica. To ensure that a waveguide does not alter the polarization state (and thereby the information content) of transmitted light, the waveguide should exhibit minimal birefringence and minimal losses. For this purpose, the influence of different beam shaping methods for the inscription laser on the waveguide's optical properties are investigated. Waveguides with lowest losses at a low birefringence were achieved using an anamorphic zoom system. Furthermore, two concepts for embedding compact polarization manipulating elements into the waveguides are presented. Firstly, it is shown that the self-ordered material modification “nanograting” can be used to create embedded waveplates, where the optical properties are determined by the laser inscription parameters during the fabrication process. The obtained structures can be used not only for classical applications, but also as single qubit quantum gates, which is demonstrated using single photon experiments. The second concept for embedding polarization manipulating elements into waveguides is based on liquid crystals, which allow active reconfiguration of the optical circuit after inscription and a dynamic change of the polarization state in a waveguide.
Book Synopsis Integrated Devices for Quantum Information with Polarization Encoded Qubits by : Linda Sansoni
Download or read book Integrated Devices for Quantum Information with Polarization Encoded Qubits written by Linda Sansoni and published by Springer. This book was released on 2014-06-03 with total page 143 pages. Available in PDF, EPUB and Kindle. Book excerpt: Quantum information science has found great experimental success by exploiting single photons. To date, however, the majority of quantum optical experiments use large-scale (bulk) optical elements bolted down to an optical bench, an approach that ultimately limits the complexity and stability of the quantum circuits required for quantum science and technology. The realization of complex optical schemes involving large numbers of elements requires the introduction of waveguide technology to achieve the desired scalability, stability and miniaturization of the device. This thesis reports on surprising findings in the field of integrated devices for quantum information. Here the polarization of the photon is shown to offer a suitable degree of freedom for encoding quantum information in integrated systems. The most important results concern: the quantum interference of polarization entangled photons in an on-chip directional coupler; the realization of a Controlled-NOT (CNOT) gate operating with polarization qubits; the realization of a quantum walk of bosons and fermions in an ordered optical lattice and the quantum simulation of Anderson localization of bosons and fermions simulated by polarization entangled photons in a disordered quantum walk. The findings presented in this thesis represent an important step towards the integration of a complete quantum photonic experiment in a chip.
Book Synopsis Femtosecond Laser Filamentation by : See Leang Chin
Download or read book Femtosecond Laser Filamentation written by See Leang Chin and published by Springer Science & Business Media. This book was released on 2010-03-10 with total page 138 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book attempts to give a discussion of the physics and current and potential applications of the self-focusing of an intense femtosecond laser pulse in a tra- parent medium. Although self-focusing is an old subject of nonlinear optics, the consequence of self-focusing of intense femtosecond laser pulses is totally new and unexpected. Thus, new phenomena are observed, such as long range lam- tation, intensity clamping, white light laser pulse, self-spatial ltering, self-group phase locking, self-pulse compression, clean nonlinear uorescence, and so on. Long range propagation at high intensity, which is seemingly against the law of diffraction, is probably one of the most exciting consequences of this new sub- eld of nonlinear optics. Because the intensity inside the lament core is high, new ways of doing nonlinear optics inside the lament become possible. We call this lamentation nonlinear optics. We shall describe the generation of pulses at other wavelengths in the visible and ultraviolet (UV) starting from the near infrared pump pulse at 800 nm through four-wave-mixing and third harmonic generation, all in gases. Remotely sensing uorescence from the fragments of chemical and biological agents in all forms, gaseous, aerosol or solid, inside the laments in air is demonstrated in the labo- tory. The results will be shown in the last part of the book. Through analyzing the uorescence of gas molecules inside the lament, an unexpected physical process pertaining to the interaction of synchrotron radiation with molecules is observed.
Book Synopsis Planar Waveguides and other Confined Geometries by : Gerd Marowsky
Download or read book Planar Waveguides and other Confined Geometries written by Gerd Marowsky and published by Springer. This book was released on 2014-10-07 with total page 282 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides a comprehensive overview of the theoretical concepts and experimental applications of planar waveguides and other confined geometries, such as optical fibres. Covering a broad array of advanced topics, it begins with a sophisticated discussion of planar waveguide theory, and covers subjects including efficient production of planar waveguides, materials selection, nonlinear effects, and applications including species analytics down to single-molecule identification, and thermo-optical switching using planar waveguides. Written by specialists in the techniques and applications covered, this book will be a useful resource for advanced graduate students and researchers studying planar waveguides and optical fibers.
Book Synopsis Full Vector-field Control of Femtosecond Laser Pulses with an Improved Optical Design by : Christoph Benjamin Schwarz
Download or read book Full Vector-field Control of Femtosecond Laser Pulses with an Improved Optical Design written by Christoph Benjamin Schwarz and published by . This book was released on 2017 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Bandwidth Control of Femtosecond Pulse Written Fiber Bragg Gratings by : Christian Voigtländer
Download or read book Bandwidth Control of Femtosecond Pulse Written Fiber Bragg Gratings written by Christian Voigtländer and published by . This book was released on 2015 with total page 232 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 2004 with total page 814 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Fiber Bragg Gratings by : Andreas Othonos
Download or read book Fiber Bragg Gratings written by Andreas Othonos and published by Artech House Publishers. This book was released on 1999 with total page 448 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fiber Bragg gratings are flexible, cost-effective and highly efficient, with a vast range of potential applications. This timely new work provides a comprehensive description of the principles and practical applications of this latest technology, which has the potential to revolutionize telecommunications and significantly impact optical fiber sensing. Here the authors explain the underlying physics and practical aspects in a clear and unambiguous manner.
Book Synopsis Optics of Femtosecond Laser Pulses by : Sergeĭ Aleksandrovich Akhmanov
Download or read book Optics of Femtosecond Laser Pulses written by Sergeĭ Aleksandrovich Akhmanov and published by American Institute of Physics. This book was released on 1992 with total page 392 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Blurb & Contents" The wave optics of ultrashort pulses--an area experiencing rapid growth--is closely scrutinized in this completely up-to-date survey, which emphasizes new problems connected with the propagation of the shortest possible pulses. You'll find a presentation of the principles of the Fourier optics of short wave packets propagating in linear dispersive media. Discusses the development of femtosecond laser systems along with the feasibility of controlling pulse shape. Contents: Short Optical Pulses in Linear Dispersive Media. Self-action of Optical Pulses; Self-modulation, Self-compression, Solitons, and Instabilities. Parametric Interactions and Coherent Scattering of Femtosecond Pulses. Fast Phase Control. Compression and Shaping of Optical Pulses. Optical Solitons. Picosecond and Femtosecond Pulses in Optical Information Systems.
Book Synopsis Femtosecond Laser Written Diffractive Optical Devices by : Qi Sun
Download or read book Femtosecond Laser Written Diffractive Optical Devices written by Qi Sun and published by . This book was released on 2021 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Third-Generation Femtosecond Technology by : Hanieh Fattahi
Download or read book Third-Generation Femtosecond Technology written by Hanieh Fattahi and published by Springer. This book was released on 2016-08-23 with total page 140 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis offers a thorough and informative study of high-power, high-energy optical parametric chirped pulse amplifications systems, the foundation of the next generation of femtosecond laser technology. Starting from the basics of the linear processes involved and the essential design considerations, the author clearly and systematically describes the various prerequisites of the nonlinear optical systems expected to drive attosecond physics in the coming decade. In this context, he gives an overview of methods for generating the broadband and carrier-envelope-phase stable seed pulses necessary for producing controlled electric-field waveforms in the final system; provides a guide to handling the high-power, high-energy pump lasers required to boost the pulse energy to the desired operating range; describes the design of the nonlinear optical system used to perform the amplification, including modes of operation for ultra-broadband infrared-visible pulses or narrowband (yet still ultrafast) pulses tunable over multiple octaves; and finally presents a prospective high-energy field synthesizer based upon these techniques. As such, this work is essential reading for all scientists interested in utilizing the newest generation of ultrafast systems.
Book Synopsis Femtosecond Laser Micromachining by : Roberto Osellame
Download or read book Femtosecond Laser Micromachining written by Roberto Osellame and published by Springer Science & Business Media. This book was released on 2012-03-05 with total page 485 pages. Available in PDF, EPUB and Kindle. Book excerpt: Femtosecond laser micromachining of transparent material is a powerful and versatile technology. In fact, it can be applied to several materials. It is a maskless technology that allows rapid device prototyping, has intrinsic three-dimensional capabilities and can produce both photonic and microfluidic devices. For these reasons it is ideally suited for the fabrication of complex microsystems with unprecedented functionalities. The book is mainly focused on micromachining of transparent materials which, due to the nonlinear absorption mechanism of ultrashort pulses, allows unique three-dimensional capabilities and can be exploited for the fabrication of complex microsystems with unprecedented functionalities.This book presents an overview of the state of the art of this rapidly emerging topic with contributions from leading experts in the field, ranging from principles of nonlinear material modification to fabrication techniques and applications to photonics and optofluidics.
Book Synopsis Wavelength Filters in Fibre Optics by : Herbert Venghaus
Download or read book Wavelength Filters in Fibre Optics written by Herbert Venghaus and published by Springer. This book was released on 2006-09-21 with total page 472 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is the first book dedicated to wavelength filters for fibre optics. It provides a comprehensive account of the principles and applications of such filters, including their technological realizations. It explains the relevant performance parameters, the particular advantages and shortcomings of the various concepts and components, and the preferred applications. There is also in-depth information on the characteristics of commercially available devices.
Book Synopsis Femtosecond Optical Frequency Comb: Principle, Operation and Applications by : Jun Ye
Download or read book Femtosecond Optical Frequency Comb: Principle, Operation and Applications written by Jun Ye and published by Springer. This book was released on 2010-10-29 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Over the last few years, there has been a convergence between the fields of ultrafast science, nonlinear optics, optical frequency metrology, and precision laser spectroscopy. These fields have been developing largely independently since the birth of the laser, reaching remarkable levels of performance. On the ultrafast frontier, pulses of only a few cycles long have been produced, while in optical spectroscopy, the precision and resolution have reached one part in Although these two achievements appear to be completely disconnected, advances in nonlinear optics provided the essential link between them. The resulting convergence has enabled unprecedented advances in the control of the electric field of the pulses produced by femtosecond mode-locked lasers. The corresponding spectrum consists of a comb of sharp spectral lines with well-defined frequencies. These new techniques and capabilities are generally known as “femtosecond comb technology. ” They have had dramatic impact on the diverse fields of precision measurement and extreme nonlinear optical physics. The historical background for these developments is provided in the Foreword by two of the pioneers of laser spectroscopy, John Hall and Theodor Hänsch. Indeed the developments described in this book were foreshadowed by Hänsch’s early work in the 1970s when he used picosecond pulses to demonstrate the connection between the time and frequency domains in laser spectroscopy. This work complemented the advances in precision laser stabilization developed by Hall.
Book Synopsis Polarization Engineering with Ultrafast Laser Writing in Transparent Media by : Martynas Beresna
Download or read book Polarization Engineering with Ultrafast Laser Writing in Transparent Media written by Martynas Beresna and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: In this thesis novel developments in the field of femtosecond laser material processing are reported. Thanks to the unique properties of light-matter interaction on ultrashort time scales, this direct writing technique allowed the observation of unique phenomena in transparent media and the engineering of novel polarization devices. Using tightly focused femtosecond laser pulses', high average power second harmonic light was generated in the air with two orders of magnitude higher normalised efficiency than reported by earlier studies. We also demonstrated optical vortex generation in the air as a result of spin-orbital momentum coupling in the frequency doubling process. The ultrashort laser pulses were also explored as a tool for micro-bubble formation. Due to the high refractive index contrast at the interface of a bubble and the glass substrate we observed edge birefringence, which could be utilised for optical vortex generation or as a radial polarizer. The experimental observation was supported by a theoretical model. Finally, a series of birefringent optical elements were developed based on self-assembled nanostructures induced by ultrashort laser pulses in fused silica. The process was discovered a decade ago and mostly was regarded as a scientific curiosity. However, we demonstrated that these nanostructures can be used as the building blocks for novel optical elements based on spatially varying birefringent properties.
Book Synopsis Femtosecond Laser Induced Permanent and Transient Fiber Bragg Gratings by : Avishay Shamir
Download or read book Femtosecond Laser Induced Permanent and Transient Fiber Bragg Gratings written by Avishay Shamir and published by . This book was released on 2017 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt:
