Photonic Digitization With Differential Encoding Based on Orthogonal Vector Superposition
In this paper a novel photonic digitization scheme with differential encoding based on orthogonal vector superposition (OVS) is proposed and demonstrated. A phase modulator (PM) and two delay-line interferometers (DLIs) with π/2 difference in bias phase are employed to generate...
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| Format: | Article |
| Language: | English |
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IEEE
2019-01-01
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| Series: | IEEE Photonics Journal |
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| Online Access: | https://ieeexplore.ieee.org/document/8861361/ |
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| author | Shuna Yang Hao Chi Bo Yang Ran Zeng Jun Ou Yanrong Zhai Qiliang Li |
| author_facet | Shuna Yang Hao Chi Bo Yang Ran Zeng Jun Ou Yanrong Zhai Qiliang Li |
| author_sort | Shuna Yang |
| collection | DOAJ |
| description | In this paper a novel photonic digitization scheme with differential encoding based on orthogonal vector superposition (OVS) is proposed and demonstrated. A phase modulator (PM) and two delay-line interferometers (DLIs) with π/2 difference in bias phase are employed to generate two orthogonal modulated signals. By adjusting and combining the intensity of two orthogonal signals with an OVS module, the desired phase shifts among different transfer functions can be obtained. The proposed scheme can differentially encode the input signal with enhanced bit resolution. Compared with the existing photonic digitization schemes based on modulators, this scheme features its simple configuration, because only a single PM, two DLIs and an OVS module are required; moreover, since the desired phase shifts of transfer functions are realized by attenuating the signal intensities, the proposed scheme can effectively alleviate the problem of phase bias drift induced by modulators. Proof-of-concept experiments of 3- and 4-bit photonic digitization systems based on OVS are successfully carried out, which demonstrate the feasibility of the approach. |
| format | Article |
| id | doaj-art-b37b05666f314a8a950bd0f981762ee5 |
| institution | DOAJ |
| issn | 1943-0655 |
| language | English |
| publishDate | 2019-01-01 |
| publisher | IEEE |
| record_format | Article |
| series | IEEE Photonics Journal |
| spelling | doaj-art-b37b05666f314a8a950bd0f981762ee52025-08-20T02:44:40ZengIEEEIEEE Photonics Journal1943-06552019-01-011161910.1109/JPHOT.2019.29457808861361Photonic Digitization With Differential Encoding Based on Orthogonal Vector SuperpositionShuna Yang0Hao Chi1https://orcid.org/0000-0001-5913-2794Bo Yang2https://orcid.org/0000-0001-7837-3454Ran Zeng3Jun Ou4Yanrong Zhai5Qiliang Li6School of Communication Engineering, Hangzhou Dianzi University, Hangzhou, ChinaSchool of Communication Engineering, Hangzhou Dianzi University, Hangzhou, ChinaSchool of Communication Engineering, Hangzhou Dianzi University, Hangzhou, ChinaSchool of Communication Engineering, Hangzhou Dianzi University, Hangzhou, ChinaSchool of Communication Engineering, Hangzhou Dianzi University, Hangzhou, ChinaSchool of Communication Engineering, Hangzhou Dianzi University, Hangzhou, ChinaSchool of Communication Engineering, Hangzhou Dianzi University, Hangzhou, ChinaIn this paper a novel photonic digitization scheme with differential encoding based on orthogonal vector superposition (OVS) is proposed and demonstrated. A phase modulator (PM) and two delay-line interferometers (DLIs) with π/2 difference in bias phase are employed to generate two orthogonal modulated signals. By adjusting and combining the intensity of two orthogonal signals with an OVS module, the desired phase shifts among different transfer functions can be obtained. The proposed scheme can differentially encode the input signal with enhanced bit resolution. Compared with the existing photonic digitization schemes based on modulators, this scheme features its simple configuration, because only a single PM, two DLIs and an OVS module are required; moreover, since the desired phase shifts of transfer functions are realized by attenuating the signal intensities, the proposed scheme can effectively alleviate the problem of phase bias drift induced by modulators. Proof-of-concept experiments of 3- and 4-bit photonic digitization systems based on OVS are successfully carried out, which demonstrate the feasibility of the approach.https://ieeexplore.ieee.org/document/8861361/Photonic digitizationanalog-to-digital conversiondifferential encodingorthogonal vector superpositiondelay-line interferometer (DLI). |
| spellingShingle | Shuna Yang Hao Chi Bo Yang Ran Zeng Jun Ou Yanrong Zhai Qiliang Li Photonic Digitization With Differential Encoding Based on Orthogonal Vector Superposition IEEE Photonics Journal Photonic digitization analog-to-digital conversion differential encoding orthogonal vector superposition delay-line interferometer (DLI). |
| title | Photonic Digitization With Differential Encoding Based on Orthogonal Vector Superposition |
| title_full | Photonic Digitization With Differential Encoding Based on Orthogonal Vector Superposition |
| title_fullStr | Photonic Digitization With Differential Encoding Based on Orthogonal Vector Superposition |
| title_full_unstemmed | Photonic Digitization With Differential Encoding Based on Orthogonal Vector Superposition |
| title_short | Photonic Digitization With Differential Encoding Based on Orthogonal Vector Superposition |
| title_sort | photonic digitization with differential encoding based on orthogonal vector superposition |
| topic | Photonic digitization analog-to-digital conversion differential encoding orthogonal vector superposition delay-line interferometer (DLI). |
| url | https://ieeexplore.ieee.org/document/8861361/ |
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