Chaos synchronization in semiconductor lasers with polarization-rotated optical feedback |
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Authors: | Yasutoshi Takeuchi Rui Shogenji Junji Ohtsubo |
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Institution: | 2. Graduate School of Engineering, Shizuoka University, Hamamatsu, 432-8561, Japan 1. Faculty of Engineering, Shizuoka University, Hamamatsu, 432-8561, Japan
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Abstract: | Chaotic oscillations of the transverse magnetic (TM) mode, which is not a common lasing mode, are excited by using polarization-rotated
optical feedback from the transverse electric (TE) mode in a semiconductor laser. In our previous paper, we found that the
dynamics were strongly dependent on their RF components under the condition of moderate optical feedback from the TE mode
to the TM mode and that they were divided into three RF regions; low-pass filtered signals with a lower frequency than the
laser relaxation oscillation frequency, intermediate RF components including the relaxation oscillation frequency, and high-pass
filtered signals with a higher frequency higher than the relaxation oscillation frequency. Depending on the frequency bands,
the laser outputs showed different correlations. In the present study, using such schemes, the polarization-rotated beam from
a transmitter laser (i.e., the rotated TE-mode beam of a transmitter laser) is injected into a receiver laser. We experimentally
observe chaos synchronization in accordance with the dynamics of RF components on the transmitter laser side. We also perform
numerical calculations using a model and obtain good agreement between the theoretical and experimental results. |
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