Bias Controller of Mach–Zehnder Modulator for Electro-Optic Analog-to-Digital Converter
As one of the core devices for an electro-optic analog-to-digital converter (ADC), the Mach−Zehnder (MZ) modulator plays an important role, and the output stability of the MZ modulator has a decisive influence on the conversion accuracy of the ADC. This paper proposed a pilot tone-based me...
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| Format: | Article |
| Language: | English |
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MDPI AG
2019-11-01
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| Series: | Micromachines |
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| Online Access: | https://www.mdpi.com/2072-666X/10/12/800 |
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| author | Shuxin Shi Jun Yuan Qin Huang Chongyu Shi Xin Luo Shan Lu Pengfei Yuan Hua Yu Qiuqin Yue |
| author_facet | Shuxin Shi Jun Yuan Qin Huang Chongyu Shi Xin Luo Shan Lu Pengfei Yuan Hua Yu Qiuqin Yue |
| author_sort | Shuxin Shi |
| collection | DOAJ |
| description | As one of the core devices for an electro-optic analog-to-digital converter (ADC), the Mach−Zehnder (MZ) modulator plays an important role, and the output stability of the MZ modulator has a decisive influence on the conversion accuracy of the ADC. This paper proposed a pilot tone-based method to stabilize the bias point of the modulator. This method could obtain the corresponding control voltage of the MZ modulator by adding a KHz-level dither tone to the bias end of the modulator and calculating the ratio of the first and second harmonic components. The experimental results showed that the output optical power of the modulator was stable at 3.2 dB when the bias point of the modulator was set at the orthogonal point. Moreover, the fluctuation range was not more than 0.15 dB, the first harmonic of the output signal was stable at 50.5 dB, and the fluctuation range was not more than 0.6 dB. The proposed bias controller based on the field programmable gate array (FPGA) and digital signal processing (DSP) can stabilize the modulator bias point at the orthogonal point and with a relatively high locking accuracy. |
| first_indexed | 2024-04-13T11:35:22Z |
| format | Article |
| id | doaj.art-9befd407f6484ed09d6a7da2ccee72b9 |
| institution | Directory Open Access Journal |
| issn | 2072-666X |
| language | English |
| last_indexed | 2024-04-13T11:35:22Z |
| publishDate | 2019-11-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Micromachines |
| spelling | doaj.art-9befd407f6484ed09d6a7da2ccee72b92022-12-22T02:48:28ZengMDPI AGMicromachines2072-666X2019-11-01101280010.3390/mi10120800mi10120800Bias Controller of Mach–Zehnder Modulator for Electro-Optic Analog-to-Digital ConverterShuxin Shi0Jun Yuan1Qin Huang2Chongyu Shi3Xin Luo4Shan Lu5Pengfei Yuan6Hua Yu7Qiuqin Yue8Key Laboratory for Optoelectronic Technology &Systems, Ministry of Education of China, Key Laboratory of Fundamental Science of Micro/Nano-Device and System Technology, Chongqing University, Chongqing 400044, ChinaScience and Technology on Analog Integrated Circuit Laboratory, Chongqing 401332, ChinaKey Laboratory for Optoelectronic Technology &Systems, Ministry of Education of China, Key Laboratory of Fundamental Science of Micro/Nano-Device and System Technology, Chongqing University, Chongqing 400044, ChinaKey Laboratory for Optoelectronic Technology &Systems, Ministry of Education of China, Key Laboratory of Fundamental Science of Micro/Nano-Device and System Technology, Chongqing University, Chongqing 400044, ChinaKey Laboratory for Optoelectronic Technology &Systems, Ministry of Education of China, Key Laboratory of Fundamental Science of Micro/Nano-Device and System Technology, Chongqing University, Chongqing 400044, ChinaKey Laboratory for Optoelectronic Technology &Systems, Ministry of Education of China, Key Laboratory of Fundamental Science of Micro/Nano-Device and System Technology, Chongqing University, Chongqing 400044, ChinaKey Laboratory for Optoelectronic Technology &Systems, Ministry of Education of China, Key Laboratory of Fundamental Science of Micro/Nano-Device and System Technology, Chongqing University, Chongqing 400044, ChinaKey Laboratory for Optoelectronic Technology &Systems, Ministry of Education of China, Key Laboratory of Fundamental Science of Micro/Nano-Device and System Technology, Chongqing University, Chongqing 400044, ChinaChongqing College of Electronic Engineering, Chongqing 401331, ChinaAs one of the core devices for an electro-optic analog-to-digital converter (ADC), the Mach−Zehnder (MZ) modulator plays an important role, and the output stability of the MZ modulator has a decisive influence on the conversion accuracy of the ADC. This paper proposed a pilot tone-based method to stabilize the bias point of the modulator. This method could obtain the corresponding control voltage of the MZ modulator by adding a KHz-level dither tone to the bias end of the modulator and calculating the ratio of the first and second harmonic components. The experimental results showed that the output optical power of the modulator was stable at 3.2 dB when the bias point of the modulator was set at the orthogonal point. Moreover, the fluctuation range was not more than 0.15 dB, the first harmonic of the output signal was stable at 50.5 dB, and the fluctuation range was not more than 0.6 dB. The proposed bias controller based on the field programmable gate array (FPGA) and digital signal processing (DSP) can stabilize the modulator bias point at the orthogonal point and with a relatively high locking accuracy.https://www.mdpi.com/2072-666X/10/12/800electro-optic analog-to-digital converter (adc)mach–zehnder (mz) modulatorbias point controllerpilot tone-based method |
| spellingShingle | Shuxin Shi Jun Yuan Qin Huang Chongyu Shi Xin Luo Shan Lu Pengfei Yuan Hua Yu Qiuqin Yue Bias Controller of Mach–Zehnder Modulator for Electro-Optic Analog-to-Digital Converter Micromachines electro-optic analog-to-digital converter (adc) mach–zehnder (mz) modulator bias point controller pilot tone-based method |
| title | Bias Controller of Mach–Zehnder Modulator for Electro-Optic Analog-to-Digital Converter |
| title_full | Bias Controller of Mach–Zehnder Modulator for Electro-Optic Analog-to-Digital Converter |
| title_fullStr | Bias Controller of Mach–Zehnder Modulator for Electro-Optic Analog-to-Digital Converter |
| title_full_unstemmed | Bias Controller of Mach–Zehnder Modulator for Electro-Optic Analog-to-Digital Converter |
| title_short | Bias Controller of Mach–Zehnder Modulator for Electro-Optic Analog-to-Digital Converter |
| title_sort | bias controller of mach zehnder modulator for electro optic analog to digital converter |
| topic | electro-optic analog-to-digital converter (adc) mach–zehnder (mz) modulator bias point controller pilot tone-based method |
| url | https://www.mdpi.com/2072-666X/10/12/800 |
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