| The dissertation is a combination of experimental and theoretical studies, and numerical simulations in the fields of image acquisition and high-power beam transmission through a multimode fiber.;The advantage of the use of a single multimode fiber in an endoscopic device is obvious. It means flexible and very thin endoscope or borescope. The cross-section of such endoscope could be hundred times smaller then of the existing devices.;Two basic problems for image acquisition are discussed. First one is the image scrambling due to propagation in the multimode fiber, and second one is the sensitivity of this scrambling to the geometry changes of the multimode fiber, such as bends. Several schemes are suggested for overcoming these obstacles. Theoretical research, numerical simulations and physical experiments were done in order to investigate the validity of those schemes.;Quality beam transmission through a multimode fiber is a problem, which is closely related to image transmission. A scheme was suggested and realized experimentally that allows the use of a multimode fiber for the transmission high-power beam for industrial applications.;Light propagation through a bent multimode fiber is a complex problem. General investigation of this problem was necessary for better understanding of possible limits of the suggested schemes. |
