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Research On Key Technology Of Special Optical Fiber Used In Ultrashort Pulse Amplification System

Posted on:2017-01-03Degree:MasterType:Thesis
Country:ChinaCandidate:R F TianFull Text:PDF
GTID:2308330485460427Subject:Electronic and communication engineering
Abstract/Summary:PDF Full Text Request
In this paper, we study the special optical fiber for ultrashort pulse amplification system. Due to the dispersion and nonlinearity of the optical fiber, the optical pulse can produce a certain distortion after the optical fiber is transmitted through the optical fiber, which can reduce the system’s reliability. Study the corresponding specialty optical fiber, reduce the fiber dispersion and nonlinearity, can effectively reduce the distortion of the output pulse, making the performance of the whole transmission system have been greatly improved, so it is today’s research one of the hot spots in the study.The increase of the effective area of the optical fiber can reduce the nonlinear effect of the optical fiber, and the optical power of the optical fiber is improved. In order to research and application in high power laser with large effective area of the doped fiber, this paper on ordinary large mode area fiber, erbium doped fiber, photonic crystal fiber were studied refractive index alternating large mode area fiber was designed, large mode field area of photonic crystal fiber.By combining the MATLAB to solve the nonlinear Schrodinger equation, modeling of the transmission pulse in optical fiber, analysis of pulse propagation in an optical fiber is very convenient; the ordinary single-mode fiber optical pulse output after the analysis of the design, the refraction rate goes by the model of the large mode area fiber, improved mixing erbium doped fiber, large mode area of photonic crystal fiber optical pulse output and single-mode fiber are analyzed and compared, studied under different input power, ultrashort pulse output pulse in time domain and frequency spectrum changes, the design of the large mode area fiber bearing capacity of the high power pulse is verified.
Keywords/Search Tags:ultrashort pulse light, nonlinear Schrodinger equation, large effective area
PDF Full Text Request
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