Generation of a broadband chaotic laser by active optical feedback loop combined with a high nonlinear fiber

We propose and demonstrate a method to generate a flat broadband chaotic laser by using an active optical feedback loop combined with a high nonlinear fiber. The feedback strength and nonlinear effect, especially the four-wave mixing effect of high nonlinear fiber, are studied to improve the bandwid...

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Bibliographic Details
Published in:Optics letters 2020-04, Vol.45 (7), p.1750-1753
Main Authors: Yang, Qiang, Qiao, Lijun, Zhang, Mingjiang, Zhang, Jianzhong, Wang, Tao, Gao, Shaohua, Chai, Mengmeng, Menjabin Mohiuddin, Promi
Format: Article
Language:English
Subjects:
Bandwidths
Broadband
Feedback loops
Flatness
Four-wave mixing
Frequency ranges
Optical feedback
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Summary:We propose and demonstrate a method to generate a flat broadband chaotic laser by using an active optical feedback loop combined with a high nonlinear fiber. The feedback strength and nonlinear effect, especially the four-wave mixing effect of high nonlinear fiber, are studied to improve the bandwidth and flatness of chaos. When the feedback strength is 6.6 and injected fiber power is 1.0 W, a chaotic signal with a frequency range over 50 GHz, 80% bandwidth of 38.9 GHz, and flatness of 4.2 dB are experimentally achieved.
ISSN:0146-9592
1539-4794
DOI:10.1364/OL.387963