Radio frequency downconversion based on a tunable optoelectronic oscillator

Zhen Zeng; Zhiyao Zhang; Yangxue Ma; Yali Zhang; Shangjian Zhang; Yong Liu

doi:10.1117/12.2519810

14 February 2019 Radio frequency downconversion based on a tunable optoelectronic oscillator

Zhen Zeng, Zhiyao Zhang, Yangxue Ma, Yali Zhang, Shangjian Zhang, Yong Liu

Proceedings Volume 11048, 17th International Conference on Optical Communications and Networks (ICOCN2018); 110482Y (2019) https://doi.org/10.1117/12.2519810
Event: 17th International Conference on Optical Communications and Networks (ICOCN2018), 2018, Zhuhai, China

Abstract

An optically tunable radio frequency (RF) downconversion scheme is proposed based on an optoelectronic oscillator (OEO) incorporating a tunable microwave photonic filter. The local oscillation (LO) is generated in the OEO, whose frequency is varied through simply tuning the frequency difference between the optical carrier and the reflection notch of a phase-shifted fiber Bragg grating (PS-FBG). The LO and the input RF signal are combined and added to the OEO loop by a single phase modulator. The RF modulation sidebands and one of the LO modulation sidebands are extracted out of the OEO loop by the PS-FBG and sent to a photo-detector to achieve RF downconversion. In the experiment, optically tunable LOs in the frequency range of 6 GHz to 15 GHz are generated, and RF signals in the frequency range of 7 GHz to 16 GHz are successfully down-converted to intermediate frequency band around 1 GHz. The proposed scheme has the potential to cover a frequency range beyond 40 GHz.

Citation Download Citation

Zhen Zeng, Zhiyao Zhang, Yangxue Ma, Yali Zhang, Shangjian Zhang, and Yong Liu "Radio frequency downconversion based on a tunable optoelectronic oscillator", Proc. SPIE 11048, 17th International Conference on Optical Communications and Networks (ICOCN2018), 110482Y (14 February 2019); https://doi.org/10.1117/12.2519810

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KEYWORDS

Signal generators

Modulation

Optoelectronics

Modulators

Oscillators

Electrooptic modulators

Fiber Bragg gratings

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