Automatic Power Control for a Frequency Tunable Optoelectronic Oscillator

Automatic power control for a frequency tunable optoelectronic oscillator (OEO) is proposed and experimentally demonstrated. The OEO is implemented by a tunable microwave photonic filter using a phase-shifted fiber Bragg grating (PS-FBG) for frequency-tuning. Taking advantage of the automatic power...

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Bibliographic Details
Published in:IEEE transactions on circuits and systems. II, Express briefs Express briefs, 2023-04, Vol.70 (4), p.1385-1389
Main Authors: Mei, Yufan, Bi, Xiaojun, Cao, Zilan, Weng, Jingyu, Guo, Xiaoguang, Xu, Qinfen
Format: Article
Language:English
Subjects:
Automatic control
automatic power control (APC)
Bragg gratings
Circuits
equalization
Microwave filters
Microwave oscillators
microwave photonic filter
Microwave photonics
Noise levels
Optoelectronic oscillator (OEO)
Optoelectronics
Oscillators
Phase noise
Power control
power fluctuation
Radio frequency
RF signals
Tuning
Voltage control
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Summary:Automatic power control for a frequency tunable optoelectronic oscillator (OEO) is proposed and experimentally demonstrated. The OEO is implemented by a tunable microwave photonic filter using a phase-shifted fiber Bragg grating (PS-FBG) for frequency-tuning. Taking advantage of the automatic power control (APC), the problem of large power fluctuation in the OEO output signal during the frequency tuning or interfered by the external disturbance can be significantly improved and the functionality of equalization is realized. By adjusting the DC reference voltage of the automatic power control circuit, the tuning of RF signal power is conveniently achieved. To the best of the authors' knowledge, this is the first time that the output power regulation of OEO has been implemented. For verification, the low-cost OEO at 2-7 GHz is established. Experiment results show that the output power fluctuation of less than 3 dB and a phase noise of −113 dBc/Hz@10 kHz are achieved.
ISSN:1549-7747
1558-3791
DOI:10.1109/TCSII.2022.3225845