Abstract

A fiber-optic system is proposed and experimentally demonstrated for real-time, on-the-fly identification of an incoherent-light energy spectrum pattern based on dispersion-induced time-spectrum convolution. In the proposed system, the incoming frequency-spectrum patterns to be identified are modulated by a time-mapped version of the target intensity profile. Following propagation through a suitable fiber-optic dispersive medium, the measured output temporal waveform provides a correlation of the incoming spectra with the programmed target pattern. This enables direct, real-time detection of the matching energy spectra, without any further numerical post-processing. We experimentally demonstrate successful recognition of a target infrared spectral pattern, extending over a bandwidth of 1.5 THz with a resolution of $\sim 12\mathrm{GHz}$, with sub-megahertz update rates. A path for further performance improvements is also suggested.

© 2018 Optical Society of America

Photonics-enabled compressive sensing with spectral encoding using an incoherent broadband source

Zhijing Zhu, Hao Chi, Tao Jin, Shilie Zheng, Xianbin Yu, Xiaofeng Jin, and Xianmin Zhang
Opt. Lett. 43(2) 330-333 (2018)

Ultra-broadband spatiotemporal sweeping device for high-speed optical imaging

Cihang Kong, Xiaoming Wei, Jiqiang Kang, Sisi Tan, Kevin Tsia, and Kenneth K. Y. Wong
Opt. Lett. 43(15) 3546-3549 (2018)

Reconfigurable optical differential phase-shift-keying pattern recognition based on incoherent photonic processing

Antonio Malacarne, Reza Ashrafi, Yongwoo Park, and José Azaña
Opt. Lett. 36(21) 4290-4292 (2011)

High-speed all-optical pattern recognition of dispersive Fourier images through a photonic reservoir computing subsystem

Charis Mesaritakis, Adonis Bogris, Alexandros Kapsalis, and Dimitris Syvridis
Opt. Lett. 40(14) 3416-3419 (2015)

Microcavity-coupled fiber Bragg grating with tunable reflection spectra and speed of light

Lei Chen, Ya Han, Qian Liu, Yan-Ge Liu, Weigang Zhang, and Keng C. Chou
Opt. Lett. 43(8) 1662-1665 (2018)