Generation of Flat Terahertz Noise by Mixing Incoherent Light Fields
Terahertz (THz) noise sources play an irreplaceable role in testing THz devices and evaluating THz application systems, and the flatness of their radio frequency (RF) spectra is an important technical parameter. In this paper, a scheme for generating flat THz noise by mixing multiple filtered incohe...
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-07-01
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| Series: | Photonics |
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| Online Access: | https://www.mdpi.com/2304-6732/10/7/778 |
| _version_ | 1797587758206681088 |
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| author | Youwen Zhang Wenjie Liu Ya Guo Junbin Liu Zhiwei Jia Yuehui Sun Anbang Wang Yuncai Wang |
| author_facet | Youwen Zhang Wenjie Liu Ya Guo Junbin Liu Zhiwei Jia Yuehui Sun Anbang Wang Yuncai Wang |
| author_sort | Youwen Zhang |
| collection | DOAJ |
| description | Terahertz (THz) noise sources play an irreplaceable role in testing THz devices and evaluating THz application systems, and the flatness of their radio frequency (RF) spectra is an important technical parameter. In this paper, a scheme for generating flat THz noise by mixing multiple filtered incoherent light fields is proposed. A theoretical analysis is conducted to investigate the impact of different spectral linewidths and central wavelength differences of incoherent light fields on the noise power and RF spectrum flatness, and an optimized experimental scheme is obtained. The results show that the proposed method can generate a 280–380 GHz flat THz noise signal with an RF spectrum flatness of ±0.5 dB in simulation and ±2.7 dB in our experiments. This article provides an excellent technical solution to the demand for flat THz noise in the THz field. |
| first_indexed | 2024-03-11T00:44:22Z |
| format | Article |
| id | doaj.art-e706b6beb8d84f38b4abbff1260ee02f |
| institution | Directory Open Access Journal |
| issn | 2304-6732 |
| language | English |
| last_indexed | 2024-03-11T00:44:22Z |
| publishDate | 2023-07-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Photonics |
| spelling | doaj.art-e706b6beb8d84f38b4abbff1260ee02f2023-11-18T20:58:01ZengMDPI AGPhotonics2304-67322023-07-0110777810.3390/photonics10070778Generation of Flat Terahertz Noise by Mixing Incoherent Light FieldsYouwen Zhang0Wenjie Liu1Ya Guo2Junbin Liu3Zhiwei Jia4Yuehui Sun5Anbang Wang6Yuncai Wang7Key Laboratory of Advanced Transducers and Intelligent Control System, Ministry of Education and Shanxi Province, College of Electronic Information and Optical Engineering, Taiyuan University of Technology, Taiyuan 030024, ChinaKey Laboratory of Photonics Technology for Integrated Sensing and Communication, Guangdong University of Technology, Ministry of Education, Guangzhou 510006, ChinaSchool of Electronics and Information, Northwestern Polytechnical University, Xi’an 710072, ChinaKey Laboratory of Photonics Technology for Integrated Sensing and Communication, Guangdong University of Technology, Ministry of Education, Guangzhou 510006, ChinaKey Laboratory of Advanced Transducers and Intelligent Control System, Ministry of Education and Shanxi Province, College of Electronic Information and Optical Engineering, Taiyuan University of Technology, Taiyuan 030024, ChinaKey Laboratory of Photonics Technology for Integrated Sensing and Communication, Guangdong University of Technology, Ministry of Education, Guangzhou 510006, ChinaKey Laboratory of Advanced Transducers and Intelligent Control System, Ministry of Education and Shanxi Province, College of Electronic Information and Optical Engineering, Taiyuan University of Technology, Taiyuan 030024, ChinaKey Laboratory of Photonics Technology for Integrated Sensing and Communication, Guangdong University of Technology, Ministry of Education, Guangzhou 510006, ChinaTerahertz (THz) noise sources play an irreplaceable role in testing THz devices and evaluating THz application systems, and the flatness of their radio frequency (RF) spectra is an important technical parameter. In this paper, a scheme for generating flat THz noise by mixing multiple filtered incoherent light fields is proposed. A theoretical analysis is conducted to investigate the impact of different spectral linewidths and central wavelength differences of incoherent light fields on the noise power and RF spectrum flatness, and an optimized experimental scheme is obtained. The results show that the proposed method can generate a 280–380 GHz flat THz noise signal with an RF spectrum flatness of ±0.5 dB in simulation and ±2.7 dB in our experiments. This article provides an excellent technical solution to the demand for flat THz noise in the THz field.https://www.mdpi.com/2304-6732/10/7/778optical devicesflatnessincoherent lightopto-electrical conversionterahertz noise |
| spellingShingle | Youwen Zhang Wenjie Liu Ya Guo Junbin Liu Zhiwei Jia Yuehui Sun Anbang Wang Yuncai Wang Generation of Flat Terahertz Noise by Mixing Incoherent Light Fields Photonics optical devices flatness incoherent light opto-electrical conversion terahertz noise |
| title | Generation of Flat Terahertz Noise by Mixing Incoherent Light Fields |
| title_full | Generation of Flat Terahertz Noise by Mixing Incoherent Light Fields |
| title_fullStr | Generation of Flat Terahertz Noise by Mixing Incoherent Light Fields |
| title_full_unstemmed | Generation of Flat Terahertz Noise by Mixing Incoherent Light Fields |
| title_short | Generation of Flat Terahertz Noise by Mixing Incoherent Light Fields |
| title_sort | generation of flat terahertz noise by mixing incoherent light fields |
| topic | optical devices flatness incoherent light opto-electrical conversion terahertz noise |
| url | https://www.mdpi.com/2304-6732/10/7/778 |
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