Microfiber evanescent-field photothermal gas detection using acoustic-induced mode-dependent frequency shift
In this study, we experimentally showcase the microfiber evanescent-field photothermal gas detection by exploiting all-fiber MHz-level frequency shift scheme. Based on the acousto-optic interaction effect, the low-frequency shifts of 0.9 MHz and 1.83 MHz can be obtained through the cyclic conversion...
| Main Authors: | , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
De Gruyter
2023-06-01
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| Series: | Nanophotonics |
| Subjects: | |
| Online Access: | https://doi.org/10.1515/nanoph-2023-0092 |
| _version_ | 1797752436932214784 |
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| author | Zhu Yi Guo Anbo Xu Jiangtao Zhang Zhengwei Pang Fufei Zhang Weijian Zeng Xianglong Sun Jianfeng |
| author_facet | Zhu Yi Guo Anbo Xu Jiangtao Zhang Zhengwei Pang Fufei Zhang Weijian Zeng Xianglong Sun Jianfeng |
| author_sort | Zhu Yi |
| collection | DOAJ |
| description | In this study, we experimentally showcase the microfiber evanescent-field photothermal gas detection by exploiting all-fiber MHz-level frequency shift scheme. Based on the acousto-optic interaction effect, the low-frequency shifts of 0.9 MHz and 1.83 MHz can be obtained through the cyclic conversion between the transverse core modes LP01 and LP11 in the few-mode fiber. Our proposed all-fiber frequency shifters show flexible MHz-level up(down) frequency shifts with superior sideband rejection ratio (over 40 dB) and low insertion loss (less than 1 dB). Furthermore, an all-fiber heterodyne interferometric detection system is implemented by leveraging the above low-frequency shifters, in which around 1-μm-diameter microfiber is investigated for photothermal gas detection. A pump-probe configuration is employed to obtain the photothermal effect induced by the gas absorption of the modulated evanescent field. By demodulating the phase of the beat signal output by the interferometer, an equivalent detection limit (1σ) of 32 ppm and a response time of 22 s are achieved for ammonia, as well as 0.24 % instability within 48 pump cycles. Given its compact all-fiber configuration and high sensitivity with fast response, the experimental results can pave the way for widespread applications like heterodyne detection, fiber optical sensors, and interplanetary coherent communications. |
| first_indexed | 2024-03-12T17:04:24Z |
| format | Article |
| id | doaj.art-d8c3ea9ce6c34725ae245176713cecb8 |
| institution | Directory Open Access Journal |
| issn | 2192-8614 |
| language | English |
| last_indexed | 2024-03-12T17:04:24Z |
| publishDate | 2023-06-01 |
| publisher | De Gruyter |
| record_format | Article |
| series | Nanophotonics |
| spelling | doaj.art-d8c3ea9ce6c34725ae245176713cecb82023-08-07T06:56:53ZengDe GruyterNanophotonics2192-86142023-06-0112163229324210.1515/nanoph-2023-0092Microfiber evanescent-field photothermal gas detection using acoustic-induced mode-dependent frequency shiftZhu Yi0Guo Anbo1Xu Jiangtao2Zhang Zhengwei3Pang Fufei4Zhang Weijian5Zeng Xianglong6Sun Jianfeng7The Key Lab of Specialty Fiber Optics and Optical Access Network, Joint International Research Laboratory of Specialty Fiber Optics and Advanced Communication, Shanghai University, Shanghai200444, ChinaThe Key Lab of Specialty Fiber Optics and Optical Access Network, Joint International Research Laboratory of Specialty Fiber Optics and Advanced Communication, Shanghai University, Shanghai200444, ChinaThe Key Lab of Specialty Fiber Optics and Optical Access Network, Joint International Research Laboratory of Specialty Fiber Optics and Advanced Communication, Shanghai University, Shanghai200444, ChinaThe Key Lab of Specialty Fiber Optics and Optical Access Network, Joint International Research Laboratory of Specialty Fiber Optics and Advanced Communication, Shanghai University, Shanghai200444, ChinaThe Key Lab of Specialty Fiber Optics and Optical Access Network, Joint International Research Laboratory of Specialty Fiber Optics and Advanced Communication, Shanghai University, Shanghai200444, ChinaThe Key Lab of Specialty Fiber Optics and Optical Access Network, Joint International Research Laboratory of Specialty Fiber Optics and Advanced Communication, Shanghai University, Shanghai200444, ChinaThe Key Lab of Specialty Fiber Optics and Optical Access Network, Joint International Research Laboratory of Specialty Fiber Optics and Advanced Communication, Shanghai University, Shanghai200444, ChinaShanghai Satellite Network Research Institute Co., Ltd, Shanghai, ChinaIn this study, we experimentally showcase the microfiber evanescent-field photothermal gas detection by exploiting all-fiber MHz-level frequency shift scheme. Based on the acousto-optic interaction effect, the low-frequency shifts of 0.9 MHz and 1.83 MHz can be obtained through the cyclic conversion between the transverse core modes LP01 and LP11 in the few-mode fiber. Our proposed all-fiber frequency shifters show flexible MHz-level up(down) frequency shifts with superior sideband rejection ratio (over 40 dB) and low insertion loss (less than 1 dB). Furthermore, an all-fiber heterodyne interferometric detection system is implemented by leveraging the above low-frequency shifters, in which around 1-μm-diameter microfiber is investigated for photothermal gas detection. A pump-probe configuration is employed to obtain the photothermal effect induced by the gas absorption of the modulated evanescent field. By demodulating the phase of the beat signal output by the interferometer, an equivalent detection limit (1σ) of 32 ppm and a response time of 22 s are achieved for ammonia, as well as 0.24 % instability within 48 pump cycles. Given its compact all-fiber configuration and high sensitivity with fast response, the experimental results can pave the way for widespread applications like heterodyne detection, fiber optical sensors, and interplanetary coherent communications.https://doi.org/10.1515/nanoph-2023-0092acoustic-induced mode-dependent frequency shiftmicrofiber evanescent fieldphotothermal heterodyne gas detectiontransverse modes cyclic conversion |
| spellingShingle | Zhu Yi Guo Anbo Xu Jiangtao Zhang Zhengwei Pang Fufei Zhang Weijian Zeng Xianglong Sun Jianfeng Microfiber evanescent-field photothermal gas detection using acoustic-induced mode-dependent frequency shift Nanophotonics acoustic-induced mode-dependent frequency shift microfiber evanescent field photothermal heterodyne gas detection transverse modes cyclic conversion |
| title | Microfiber evanescent-field photothermal gas detection using acoustic-induced mode-dependent frequency shift |
| title_full | Microfiber evanescent-field photothermal gas detection using acoustic-induced mode-dependent frequency shift |
| title_fullStr | Microfiber evanescent-field photothermal gas detection using acoustic-induced mode-dependent frequency shift |
| title_full_unstemmed | Microfiber evanescent-field photothermal gas detection using acoustic-induced mode-dependent frequency shift |
| title_short | Microfiber evanescent-field photothermal gas detection using acoustic-induced mode-dependent frequency shift |
| title_sort | microfiber evanescent field photothermal gas detection using acoustic induced mode dependent frequency shift |
| topic | acoustic-induced mode-dependent frequency shift microfiber evanescent field photothermal heterodyne gas detection transverse modes cyclic conversion |
| url | https://doi.org/10.1515/nanoph-2023-0092 |
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