A tunable optoelectronic oscillator based on a tunable microwave attenuator |
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| Affiliation: | 1. Electronics and Communication Engineering Departament, Academy of Technology, Adisaptagram, Hooghly, 712121, West Bengal, India;2. Aeronautical Institute of Technology (ITA), Microwave and Optoelectronic Department, Marechal Eduardo Gomes, 50 - Vila das Acácias, São José dos Campos, SP, 12228-900, Brazil;1. Information & Communication Company of Sichuan Grid, State Grid Corporation of China, Chengdu 610041, China;2. School of Communication and Information Engineering, University of Electronic Science and technique of China, Chengdu 611731, China |
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| Abstract: | A novel realization of a wideband tunable optoelectronic oscillator (OEO) based on dual-port electrode Mach–Zehnder modulator (DMZM), a tunable microwave attenuator (TMA), and a chirped fiber Bragg grating (CFBG) is proposed and demonstrated. By simply adjusting the power ratio between the two arms of DMZM, the chirp of the DMZM will be tuned, and the center frequency of the microwave photonic filter will be tuned. When the OEO loop in the proposed system is closed, the output frequency of OEO is determined by the microwave photonic filter, and a high spectral purity microwave signal with a tunable frequency from 5.8 to 11 GHz is generated. The single sideband (SSB) phase noise of the generated signal could reach ?107.4 dBc/Hz at an offset frequency of 10 kHz. |
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| Keywords: | Radio frequency photonics Microwave generation Optoelectronic Oscillators |
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