| 摘要 |
PURPOSE: A method and a device for handling optical pulse signals are provided to perform pulse shaping, the treatment of non-linearity and monitoring in optical communication networks in optical fiber links. CONSTITUTION: An SHG(Second Harmonic Generation) optical crystal(30) performs the cascaded SHG with respect to an FH(Fundamental Harmonic) defined by a particular wavelength. The SHG optical crystal(30) is covered by mirror surfaces at least at its two opposite facets, and leaves at least two windows(34,36) at the opposite facets for an incoming optical beam and an outgoing optical beam respectively. The SHG optical crystal(30) is arranged to create one or more internal reflections in case that the optical beam passes between the two windows(34,36), thereby providing an extended internal optical path. |
