Physically enhanced secure wavelength division multiplexing chaos communication using multimode semiconductor lasers

Chaos Bandwidth Enhancement of Fabry–Pérot Laser Diode With Dual-Mode Continuous-Wave Optical Injection

“…Here, we assume the devices are fabricated using the same material platform thus leading to identical material parameters of DFB-LDs and FP-LD as listed in Table 1, which mainly refer ref. [32,33]. Figure 2 displays the optical and power/rf spectra of FP-LD with 30 ns -1 external cavity optical feedback.…”

“…However, there attention was paid to single-mode semiconductor laser under dual-beam optical injection. In chaotic optical communication applications, multimode FP-LDs can be used as a wavelength converter [31], for demultiplexing the chaos carrier wave [32] and multiplexing the chaos carrier wave in physical securityenhanced wavelength division multiplexing chaos communication [33]. By using unidirectional optical injection, FP-LDs can realize 30 GHz 3dB modulation bandwidth, which is suitable for high-speed optical communication [34].…”

Simultaneous Generation of Multi-Channel Broadband Chaotic Signals Based on Two Unidirectionally Coupled WRC-FPLDs

“…Compared with DFB-SLs and VCSELs, Fabry-Perot laser diodes (FPLDs) possess a unique potential to generate multi-channel chaotic signals due to multi-longitudinal modes co-existing in the cavity. Jiang et al theoretically demonstrated that the multi-longitudinal modes can be simultaneously driven into chaotic states, and a physically enhanced secure wavelength division multiplexing (WDM) chaos communication scheme is hopeful for achieving [28]. Based on a FPLD, Li et al experimentally reported the generation of 19-channel chaotic signals with relative flat power spectra [29].…”

Wideband complex-enhanced chaos generation using a semiconductor laser subject to delay-interfered self-phase-modulated feedback

“…All-optical chaos generation based on external-cavity semiconductor lasers (ECSLs) has drawn great attention because of its potential applications in secure optical communications [1][2][3][4][5][6], true random bit generation (RBG) [7][8][9][10][11][12][13][14][15] and chaotic radar [16,17]. Since in conventional ECSLbased chaos generation systems, chaotic intensity oscillation is often dominated by the intrinsic relaxation oscillation of the laser, in the radio frequency (RF) spectrum of the chaotic signal, the majority of the energy is thus concentrated in the vicinity of the relaxation oscillation frequency.…”