The bandwidth of chaotic signal in vertical-cavity surface-emitting lasers with optical injection has been studied experimentally. The results show that the bandwidth of chaotic signal, which is dependent on the frequency detuning and injection strength, can be enhanced by a factor of more than two with appropriate optical injection. Under certain conditions, optical injection can also result in a reduction of the chaotic signal bandwidth.
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Hong et al. (2012) studied this question.
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