Author(s): Wang, YX (Wang, Yixuan); Jia, ZW (Jia, Zhiwei); Gao, ZS (Gao, Zhensen); Xiao, JL (Xiao, Jinlong); Wang, LS (Wang, Longsheng); Wang, YC (Wang, Yuncai); Huang, YZ (Huang, Yongzhen); Wang, AB (Wang, Anbang)

Source: OPTICS EXPRESS Volume: 28 Issue: 12 Pages: 18507-18515 DOI: 10.1364/OE.395434 Published: JUN 8 2020

Abstract: We numerically demonstrate the generation of wide-band laser chaos with flat power spectrum in a 2D circular-side hexagonal resonator (CSHR) microlaser subject to long-cavity optical feedback. The bandwidth and flatness of the chaotic power spectrum are investigated under different bias currents and optical feedback rates. Under low bias current, the bandwidth under an optimized optical feedback rate increases obviously as raising bias current and the power spectrum flatten simultaneously. Under high bias current, the optimized bandwidth gradually tends toward stabilization, with corresponding flatness less than 5 dB. We compare the chaotic power spectra with small-signal modulation response (SSR) curves under different bias currents. It can be concluded that wide-band and flat SSR indicates wide-band and flat chaotic power spectrum. This work argues that we can enhance laser chaos by using a laser device with wide-band and flat SSR and simple optical feedback configuration, which is significantly beneficial to synchronization-based applications including chaos communication and key distribution (C) 2020 Optical Society of America under the terms of the OSA Open Access Publishing Agreement.

Accession Number: WOS:000542820800123

Conference Title: OSA Topical Meeting on Computational Optical Sensing and Imaging (COSI)

Conference Date: JUN 24-27, 2019

Conference Location: Munich, GERMANY

Conference Sponsors: OSA

ISSN: 1094-4087

Full Text: https://www.osapublishing.org/oe/abstract.cfm?uri=oe-28-12-18507