An Ultra-Low Phase Noise and Highly Stable Optoelectronic Oscillator Utilizing IL-PLL

A new optoelectronic oscillator (OEO) combined with injection-locked (IL) and phase locked loop (PLL) is proposed in this letter. Comparing with a free running OEO, the IL-PLL OEO can suppress the side modes, reduce close-in phase noise, and improve the long-term stability. From the experiment demon...

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Bibliographic Details
Published in:IEEE photonics technology letters 2016-02, Vol.28 (4), p.516-519
Main Authors: Zhenghua, Zhou, Chun, Yang, Zhewei, Cao, Yuhua, Chong, Xianghua, Li
Format: Article
Language:English
Subjects:
Deviation
frequency stability
injection-locked and phase locked loop
low phase noise
Microwave amplifiers
Microwave filters
Microwave oscillators
Microwave photonics
Microwaves
Noise
Noise levels
Offsets
Optoelectronic oscillator
Optoelectronics
Oscillators
Phase locked loops
Phase noise
Running
single-mode oscillation
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Summary:A new optoelectronic oscillator (OEO) combined with injection-locked (IL) and phase locked loop (PLL) is proposed in this letter. Comparing with a free running OEO, the IL-PLL OEO can suppress the side modes, reduce close-in phase noise, and improve the long-term stability. From the experiment demonstration, a highly stable 9.5-GHz microwave signal with the phase noises of -125 dBc/Hz at 1-kHz offset frequency and -143 dBc/Hz at 10-kHz offset frequency is obtained, and the side-mode suppression ratio is larger than 80 dB and the Allan deviations are 1.37 × 10 -11 at an average time of 1 s and 1.22 × 10 -11 at an average time of 1000 s.
ISSN:1041-1135
1941-0174
DOI:10.1109/LPT.2015.2501369