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We present a numerical analysis that focuses, for the first time to our knowledge, on the feedback-induced dynamics in a semiconductor passively mode-locked laser with sub-wavelength resolution. Our results and the corresponding theoretical explanations elucidate several aspects of the laser dynamics under self-injection including inherent properties of mode-locked lasers such as pulse intensity noise...
The first part of this chapter provides an introduction to the cryptographic techniques applied in contemporary communication systems using algorithmic data encryption. However, there are several other techniques that may provide additional security in the transmission line, taking advantage of the properties of the communication type and the transmission medium. Optical communication systems that...
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