Broadband chaos of an interband cascade laser with a 6-GHz bandwidth

Near-infrared semiconductor lasers subject to optical feedback usually produce chaos with a broad bandwidth of a few GHz. However, the reported mid-infrared interband cascade lasers (ICLs) only show chaos with a limited bandwidth below 1 GHz. Here we show that an ICL with optical feedback is able to...

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Bibliographic Details
Published inOptics letters Vol. 49; no. 11; p. 3142
Main Authors Peng, Yi-Bo, Dai, Zhecheng, Lin, Kai-Li, Wang, Peng-Lei, Shen, Zhijian, Chen, Baile, Grillot, Frédéric, Wang, Cheng
Format Journal Article
LanguageEnglish
Published United States 01.06.2024
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ISSN1539-4794
DOI10.1364/OL.525636

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Summary:Near-infrared semiconductor lasers subject to optical feedback usually produce chaos with a broad bandwidth of a few GHz. However, the reported mid-infrared interband cascade lasers (ICLs) only show chaos with a limited bandwidth below 1 GHz. Here we show that an ICL with optical feedback is able to generate broadband chaos as well. The mid-infrared chaos exhibits a remarkable bandwidth of about 6 GHz, which is comparable to that of the near-infrared counterpart. In addition, the spectral coverage in the electrical domain reaches as high as 17.7 GHz. It is found that the chaos bandwidth generally broadens with increasing feedback ratio and/or increasing pump current of the laser, while it is insensitive to the feedback length.
ISSN:1539-4794
DOI:10.1364/OL.525636