Abstract Chaotic optical communication is a promising technique to improve both privacy and security in communication network. This research work reports numerical investigation on optical bistability based chaos in 1.3 μ m bisection, Multiple Quantum Well (MQW) laser diode. The device has longer (gain section) and shorter active regions (absorber section) with the length ratio as 97:3. In contrast to the conventional scheme of sinusoidal current injection in the gain section with unpumped absorber, this paper evaluates chaos under absorber section excitation leading to gain lever effect. The generated chaotic optical carrier at the transmitter is used to mask a 10 Gbps optical data which can be extracted by synchronizing the transmitter and receiver. Operating with a threshold current of 0.245 mA, absorber section based chaotic generation, requires only 0.51 μ W of input RF power for operation. Further, it also provides an improvement in RF to optical conversion ratio by 31.02 dB making it more efficient compared to gain section-based chaos generation.

中文翻译：

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一种在二段式激光二极管中使用增益杠杆效应的高效混沌光信号生成方案

摘要 混沌光通信是提高通信网络隐私性和安全性的一种很有前途的技术。这项研究工作报告了对 1.3 μm 平分多量子阱 (MQW) 激光二极管中基于光学双稳态的混沌的数值研究。该器件具有较长（增益段）和较短的有源区（吸收段），长度比为 97:3。与具有未泵浦吸收器的增益部分中正弦电流注入的传统方案相比，本文评估了吸收器部分激励下导致增益杠杆效应的混沌。在发射机处产生的混沌光载波用于掩蔽 10 Gbps 光数据，该数据可以通过同步发射机和接收机来提取。以 0.245 mA 的阈值电流运行，基于吸收器部分的混沌生成，仅需 0.51 μ W 的输入射频功率即可运行。此外，它还将 RF 光转换比提高了 31.02 dB，与基于增益部分的混沌生成相比，效率更高。