A Dual-loop optoelectronic oscillator for the generation of ultrapure sub-terahertz signals

Chinthapalli Amulya, Harish V Dixit and Subhradeep Pal
¹Department of EEE, BITS-Pilani Hyderabad Campus, Shameerpet, Telangana-500 078, India.

This paper is dedicated to Dr Shrinivas Joshi

THz signal generation with extreme spectral purity will be the key enabler for the next generation of wireless communications systems. In this paper, a dual-loop optoelectronic oscillator is proposed capable of generating both mm-waves and sub-THz signals using an optoelectronic loop. An all-optical dual loop structure is proposed to improve the spectral purity. Simulation studies have been carried out to show the efficacy of the proposed dual-loop optoelectronic oscillator. Simulation results revealed that the proposed dual-loop optoelectronic oscillator generating 60 GHz mm-waves can achieve 51.46 dB and 80.02 dB of sidemode suppression ratio for second and third-order modes compared to the fundamental mode. In the case of 0.1 THz generation, using the same oscillator offered a sidemode suppression ratio of 56.58 dB and 68.51 dB for second and third-order side modes. Such a versatile design of the oscillator offers great freedom to use the existing optical front end for the next generation of wireless communications © Anita Publications. All rights reserved.
Doi: 10.54955/AJP.33.9-10.2024.617-623
Keywords: OEO, Dual-loop OEO, MZIM, Optoelectronic, Oscillators.

Peer Review Information
Method: Single- anonymous; Screened for Plagiarism? Yes
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