Nonlinear Optical Fibres

摘要: The dielectric optical waveguide has been in existence for nearly 40 years[1]. Early research was focused at fibre bundles image transmission, but even after pioneering papers by Spitzer on the weakly guiding phenomenon[2] it several years later that glass fibres were recognised their transmission potential[3]. Since then, a revolution occurred: silica based waveguides with loss wavelength of 1550nm less than 0.2dB/km have routinely manufactured and long distance gigabit rate had profound impact communications. Along this major advance, become apparent low are an ideal candidate investigation host linear nonlinear phenomena modest powers. These include Rayleigh, Mie Raman scattering[4–6], Kerr effect[7] all amplification lasers[8] using rare-earth dopants such as erbium neodymium host, switching[9], soliton transmission[10], well discovery new photosensitivity[11] damage powers[12]. Nonlinear optics[13–14] known since invention laser, however, made possible to observe almost non-linear effects; surprisingly, material symmetry forbidden efficient second-harmonic generation, associated crystalline media[11].