Ripple Suppression in Broadband Microwave Photonic Phase Shifter Frequency Response
This paper presents a detailed investigation on the cause of ripples in the frequency response of a microwave photonic phase shifter implemented using a 90° hybrid coupler. It was found that an unwanted radio frequency (RF) modulation sideband is generated at the modulator output due to the...
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| Format: | Article |
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MDPI AG
2018-11-01
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| Series: | Applied Sciences |
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| Online Access: | https://www.mdpi.com/2076-3417/8/12/2433 |
| _version_ | 1818067236224499712 |
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| author | Weicheng Xia Ruiqi Zheng Bijuan Chen Erwin H. W. Chan Xudong Wang Xinhuan Feng Bai-Ou Guan |
| author_facet | Weicheng Xia Ruiqi Zheng Bijuan Chen Erwin H. W. Chan Xudong Wang Xinhuan Feng Bai-Ou Guan |
| author_sort | Weicheng Xia |
| collection | DOAJ |
| description | This paper presents a detailed investigation on the cause of ripples in the frequency response of a microwave photonic phase shifter implemented using a 90° hybrid coupler. It was found that an unwanted radio frequency (RF) modulation sideband is generated at the modulator output due to the 90° hybrid coupler amplitude and phase imbalance. This resulted in phase shifter output RF signal amplitude variation and phase deviation. Experimental results demonstrated that incorporating an optical filter in the phase shifter structure can reduce the amplitude variation and phase deviation from 4.2 dB to 2.2 dB and from ±12° to ±3.8°, respectively, over a wide frequency range. A comparison of the loss and the dynamic range of the microwave photonic phase shifter implemented using a 90° hybrid coupler with a conventional fiber optic link is also presented. |
| first_indexed | 2024-12-10T15:20:28Z |
| format | Article |
| id | doaj.art-749b3ca12052403baeab0a15c4baa37f |
| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-12-10T15:20:28Z |
| publishDate | 2018-11-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Applied Sciences |
| spelling | doaj.art-749b3ca12052403baeab0a15c4baa37f2022-12-22T01:43:41ZengMDPI AGApplied Sciences2076-34172018-11-01812243310.3390/app8122433app8122433Ripple Suppression in Broadband Microwave Photonic Phase Shifter Frequency ResponseWeicheng Xia0Ruiqi Zheng1Bijuan Chen2Erwin H. W. Chan3Xudong Wang4Xinhuan Feng5Bai-Ou Guan6Guangdong Provincial Key Laboratory of Optical Fiber Sensing and Communications, Institute of Photonics Technology, Jinan University, Guangzhou 510632, ChinaGuangdong Provincial Key Laboratory of Optical Fiber Sensing and Communications, Institute of Photonics Technology, Jinan University, Guangzhou 510632, ChinaGuangdong Provincial Key Laboratory of Optical Fiber Sensing and Communications, Institute of Photonics Technology, Jinan University, Guangzhou 510632, ChinaCollege of Engineering, IT and Environment, Charles Darwin University, Darwin NT 0909, AustraliaGuangdong Provincial Key Laboratory of Optical Fiber Sensing and Communications, Institute of Photonics Technology, Jinan University, Guangzhou 510632, ChinaGuangdong Provincial Key Laboratory of Optical Fiber Sensing and Communications, Institute of Photonics Technology, Jinan University, Guangzhou 510632, ChinaGuangdong Provincial Key Laboratory of Optical Fiber Sensing and Communications, Institute of Photonics Technology, Jinan University, Guangzhou 510632, ChinaThis paper presents a detailed investigation on the cause of ripples in the frequency response of a microwave photonic phase shifter implemented using a 90° hybrid coupler. It was found that an unwanted radio frequency (RF) modulation sideband is generated at the modulator output due to the 90° hybrid coupler amplitude and phase imbalance. This resulted in phase shifter output RF signal amplitude variation and phase deviation. Experimental results demonstrated that incorporating an optical filter in the phase shifter structure can reduce the amplitude variation and phase deviation from 4.2 dB to 2.2 dB and from ±12° to ±3.8°, respectively, over a wide frequency range. A comparison of the loss and the dynamic range of the microwave photonic phase shifter implemented using a 90° hybrid coupler with a conventional fiber optic link is also presented.https://www.mdpi.com/2076-3417/8/12/2433microwave photonicsoptical signal processingphase shifters |
| spellingShingle | Weicheng Xia Ruiqi Zheng Bijuan Chen Erwin H. W. Chan Xudong Wang Xinhuan Feng Bai-Ou Guan Ripple Suppression in Broadband Microwave Photonic Phase Shifter Frequency Response Applied Sciences microwave photonics optical signal processing phase shifters |
| title | Ripple Suppression in Broadband Microwave Photonic Phase Shifter Frequency Response |
| title_full | Ripple Suppression in Broadband Microwave Photonic Phase Shifter Frequency Response |
| title_fullStr | Ripple Suppression in Broadband Microwave Photonic Phase Shifter Frequency Response |
| title_full_unstemmed | Ripple Suppression in Broadband Microwave Photonic Phase Shifter Frequency Response |
| title_short | Ripple Suppression in Broadband Microwave Photonic Phase Shifter Frequency Response |
| title_sort | ripple suppression in broadband microwave photonic phase shifter frequency response |
| topic | microwave photonics optical signal processing phase shifters |
| url | https://www.mdpi.com/2076-3417/8/12/2433 |
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