作者: María R. Fernández-Ruiz , Lixian Wang , Alejandro Carballar , Maurizio Burla , José Azaña
DOI: 10.1364/OL.40.000041
关键词: Transformer 、 Impulse response 、 Terahertz radiation 、 Photonics 、 Fiber Bragg grating 、 Phase response 、 Image processing 、 Optics 、 PHOSFOS 、 Materials science
摘要: THz-bandwidth photonic Hilbert transformers (PHTs) are implemented for the first time, to best of our knowledge, based on fiber Bragg grating (FBG) technology. To increase practical bandwidth limitation FBGs (typically <200 GHz), a superstructure two superimposed linearly-chirped operating in transmission has been employed. The use FBG involves conversion non-minimum phase response PHT into minimum-phase by adding an anticipated instantaneous component desired system temporal impulse response. Using this methodology, 3-THz-bandwidth integer and fractional (order 0.81) designed, fabricated, successfully characterized.