2017/12/18 by Hossein Babashah, Zahra Kavehvash, Babashah, Hossein +5 · 1 citation
Engineering · #Advanced Photonic Communication Systems #FOS: Electrical engineering #FOS: Physical sciences #Optical Network Technologies #Optics (physics.optics) #Photonic and Optical Devices #Signal Processing (eess.SP) #electronic engineering #information engineering
paper · pdf · doi:10.48550/arxiv.1712.06482
openalex publication_date 2017/12/18 · openalex created_date 2022/10/07 · openalex updated_date 2026/07/28
This paper introduces the concept of on-chip temporal optical computing,\nbased on dispersive Fourier transform and suitably designed modulation module,\nto perform mathematical operations of interest, such as differentiation,\nintegration, or convolution in time domain. The desired mathematical operation\nis performed as signal propagates through a fully reconfigurable on-chip\nphotonic signal processor. Although a few number of photonic temporal signal\nprocessors have been introduced recently, they are usually bulky or they suffer\nfrom limited reconfigurability which is of great importance to implement\nlarge-scale general-purpose photonic signal processors. To address these\nlimitations, this paper demonstrates a fully reconfigurable photonic integrated\nsignal processing system. As the key point, the reconfigurability is achieved\nby taking advantages of dispersive Fourier transformation, linearly chirp\nmodulation using four wave mixing, and applying the desired arbitrary transfer\nfunction through a cascaded Mach-Zehnder modulator and phase modulator. Our\ndemonstration reveals an operation time of 200~ps with high resolution of\n300~fs. To have an on-chip photonic signal processor, a broadband photonic\ncrystal waveguide with an extremely large group-velocity dispersion of 2.81\n\× 106~ fracps2km is utilized. Numerical simulations of the\nproposed structure reveal a great potential for chip-scale fully reconfigurable\nall-optical signal processing through a bandwidth of 400~GHz.\n