Andrew Forbes – författare

How do laser beams propagate? Innovative discoveries involving laser beams and their propagation properties are at the heart of Laser Beam Propagation: Generation and Propagation of Customized Light. This book captures the essence of laser beam propagation. Divided into three parts, it explores the fundamentals of how laser beams propagate, and provides novel methods to describe and characterize general laser beams. Part one covers the physical optics approach to the propagation of optical waves, the concept of plane waves, the mathematical description of diffraction and Gaussian optics, and adapting the concepts to the single photon level. The book explains the parallels between the paraxial propagation of light beams and the Schrödinger equation in quantum mechanics, and delves into the description of paraxial optics by means of state vectors and operators. It also discusses classical optics and quantum entanglement. Part two focuses on the application of modal decomposition to the characterization of laser beams, and provides a characterization of time domain pulses. It discusses tools for the temporal characterization of laser beams, the generation of arbitrary laser beams with digital holograms, and the use of spatial light modulators to display reconfigurable digital holograms capable of modifying and shaping laser beams. It also covers various techniques and the control of the polarization properties of light.Part three defines the most commonly generated shaped light, flat-top beams, outlining their propagation rules as well as the means to create them in the laboratory. It also highlights Helmholtz-Gauss beams, vector beams, and low coherence laser beams.The text presents the concepts of coherence theory and applies this to the propagation of low coherence optical fields. It also considers the recent developments in orbital angular momentum carrying fields, touches on basics properties, definitions and applications, and brings together the classical and quantum concepts of spatial modes of light.

How do laser beams propagate? Innovative discoveries involving laser beams and their propagation properties are at the heart of Laser Beam Propagation: Generation and Propagation of Customized Light. This book captures the essence of laser beam propagation. Divided into three parts, it explores the fundamentals of how laser beams propagate, and provides novel methods to describe and characterize general laser beams. Part one covers the physical optics approach to the propagation of optical waves, the concept of plane waves, the mathematical description of diffraction and Gaussian optics, and adapting the concepts to the single photon level. The book explains the parallels between the paraxial propagation of light beams and the Schrödinger equation in quantum mechanics, and delves into the description of paraxial optics by means of state vectors and operators. It also discusses classical optics and quantum entanglement. Part two focuses on the application of modal decomposition to the characterization of laser beams, and provides a characterization of time domain pulses. It discusses tools for the temporal characterization of laser beams, the generation of arbitrary laser beams with digital holograms, and the use of spatial light modulators to display reconfigurable digital holograms capable of modifying and shaping laser beams. It also covers various techniques and the control of the polarization properties of light.Part three defines the most commonly generated shaped light, flat-top beams, outlining their propagation rules as well as the means to create them in the laboratory. It also highlights Helmholtz-Gauss beams, vector beams, and low coherence laser beams.The text presents the concepts of coherence theory and applies this to the propagation of low coherence optical fields. It also considers the recent developments in orbital angular momentum carrying fields, touches on basics properties, definitions and applications, and brings together the classical and quantum concepts of spatial modes of light.

"Andrew Forbes’s exquisitely rendered prose makes The Diapause both realistic and futuristic, devastating even while it is oddly hopeful. Vast and intimate, the novel absorbs and grips. I cannot shake its central image: the strange little noodles, the mysterious worms who seem to be dancing in the moments before catastrophe."—Liz Harmer, author of Strange LoopsWhen ten-year-old Gabriel and his parents retire to his late grandfather’s disused cabin to wait out a pandemic, the big, dangerous world seems very far away, and Gabriel enjoys the freest summer of his young life. But tensions begin to surface, testing the family unit, and resulting in consequences that he will spend his life attempting to unravel.Spanning nearly a half-century, The Diapause is a literary-speculative-fiction novel about the near future, family, isolation, heartbreak, climate change, how we keep each other safe, and all the things we don’t know about the people we know best. Part White Fang, part Station Eleven, The Diapause is a novel about how the things we seek are often the things we didn’t know we’d lost.

Tenth Anniversary Edition, featuring a new introduction by the author.Spitball literary essays on the off-kilter joys, sorrows and wonder of North America’s national pastime.A collection of essays for ardent seamheads and casual baseball fans alike, The Utility of Boredom is a book about finding respite and comfort in the order, traditions, and rituals of baseball. It’s a sport that shows us what a human being might be capable of, with extreme dedication—whether we’re eating hot dogs in the stands, waiting out a rain delay in our living rooms, or practising the lost art of catching a stray radio signal from an out-of-market broadcast.From learning about America through ball-diamond visits to the most famous triple play that never happened on Canadian soil, Forbes invites us to witness the adult conversing with the O-Pee-Chee baseball cards of his youth. Tender, insightful, and with the slow heartbreak familiar to anyone who’s cheered on a losing team, The Utility of Boredom tells us a thing or two about the sport, and how a seemingly trivial game might help us make sense of our messy lives.