Control of optical chaos spectrum in semiconductor laser for secure RoF communication

• Autorzy: Mazhar Danish Ali , Ali Syed Zafar , Islam Muhammad Khawar

Identyfikatory

DOI

10.37190/oa220401

• Języki publikacji: EN

Abstrakty

EN

A critical requirement in optical chaos based secure radio over fiber (RoF) system design is the ability to control center frequency, spectral bandwidth, power level and signature of chaos to submerge message with sufficient horizontal and vertical margins both in time and frequency domains. Once frequency domain masking is completely achieved, time domain masking is met automatically, the former being more stringent. In a direct modulated semiconductor laser, the three control parameters are bias current (I_bias), modulation current (I_mod) and modulation frequency (ω_a). It is found that I_mod increases bandwidth and amplitude dynamic range of chaotic pulses. I_bias increases the cavity power and hence average peak amplitude of laser chaotic pulses. The modulation frequency increases the speed of overall cavity dynamics and hence is used to increase the bandwidth of chaos but a corresponding increase in bias and modulation currents is required to support high repetition pulses. The results show relationship between three control parameters (bias current, modulation current and modulation frequency) in a direct modulated semiconductor laser and optical chaos bandwidth using regression.

Słowa kluczowe

EN

chaos; radio over fiber; secure optical communication

• Wydawca: Oficyna Wydawnicza Politechniki Wrocławskiej
• Czasopismo: Optica Applicata
• Rocznik: 2022
• Tom: Vol. 52, nr 4
• Strony: 485--495
• Opis fizyczny: Bibliogr. 18 poz., rys., tab.

Twórcy

autor

Mazhar Danish Ali

• Department of Telecommunication Engineering, UET, Taxila, Pakistan

autor

Ali Syed Zafar

• Department of Electrical Engineering, Air University, Islamabad, Pakistan

autor

Islam Muhammad Khawar

• Department of Electrical Engineering, Taibah University, AL Madinah Al Munawarah, KSA

Bibliografia

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Uwagi

Opracowanie rekordu ze środków MEiN, umowa nr SONP/SP/546092/2022 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2022-2023).