Optical-referenceless optical frequency counter with twelve-digit absolute accuracy
Abstract A simpler and more accurate measurement of absolute optical frequencies (AOFs) is very important for optical communications and navigation systems. To date, an optical reference has been needed for measuring AOFs with twelve-digit accuracy because of the difficulty in measuring them directl...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Nature Portfolio
2023-05-01
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| Series: | Scientific Reports |
| Online Access: | https://doi.org/10.1038/s41598-023-35674-8 |
| _version_ | 1797811504943202304 |
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| author | Atsushi Ishizawa Tadashi Nishikawa Kenichi Hitachi Tomoya Akatsuka Katsuya Oguri |
| author_facet | Atsushi Ishizawa Tadashi Nishikawa Kenichi Hitachi Tomoya Akatsuka Katsuya Oguri |
| author_sort | Atsushi Ishizawa |
| collection | DOAJ |
| description | Abstract A simpler and more accurate measurement of absolute optical frequencies (AOFs) is very important for optical communications and navigation systems. To date, an optical reference has been needed for measuring AOFs with twelve-digit accuracy because of the difficulty in measuring them directly. Here, we focus on an electro-optics-modulation comb that can bridge the vast frequency gap between photonics and electronics. We demonstrate an unprecedented method that can directly measure AOFs to an accuracy of twelve digits with an RF frequency counter by simply delivering a frequency-unknown laser into an optical phase modulator. This could open up a new horizon for optical-referenceless optical frequency metrology. Our method can also simultaneously achieve a 100-fold phase-noise reduction in a conventional signal generator. This corresponds to an increase in the transmission speed of wireless communications of by about seven times. |
| first_indexed | 2024-03-13T07:24:39Z |
| format | Article |
| id | doaj.art-bc61e43933af4107b45200636794f068 |
| institution | Directory Open Access Journal |
| issn | 2045-2322 |
| language | English |
| last_indexed | 2024-03-13T07:24:39Z |
| publishDate | 2023-05-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Scientific Reports |
| spelling | doaj.art-bc61e43933af4107b45200636794f0682023-06-04T11:27:39ZengNature PortfolioScientific Reports2045-23222023-05-011311910.1038/s41598-023-35674-8Optical-referenceless optical frequency counter with twelve-digit absolute accuracyAtsushi Ishizawa0Tadashi Nishikawa1Kenichi Hitachi2Tomoya Akatsuka3Katsuya Oguri4NTT Basic Research Laboratories, Nippon Telegraph and Telephone CorporationDepartment of Electronic Engineering, Tokyo Denki UniversityNTT Basic Research Laboratories, Nippon Telegraph and Telephone CorporationNTT Basic Research Laboratories, Nippon Telegraph and Telephone CorporationNTT Basic Research Laboratories, Nippon Telegraph and Telephone CorporationAbstract A simpler and more accurate measurement of absolute optical frequencies (AOFs) is very important for optical communications and navigation systems. To date, an optical reference has been needed for measuring AOFs with twelve-digit accuracy because of the difficulty in measuring them directly. Here, we focus on an electro-optics-modulation comb that can bridge the vast frequency gap between photonics and electronics. We demonstrate an unprecedented method that can directly measure AOFs to an accuracy of twelve digits with an RF frequency counter by simply delivering a frequency-unknown laser into an optical phase modulator. This could open up a new horizon for optical-referenceless optical frequency metrology. Our method can also simultaneously achieve a 100-fold phase-noise reduction in a conventional signal generator. This corresponds to an increase in the transmission speed of wireless communications of by about seven times.https://doi.org/10.1038/s41598-023-35674-8 |
| spellingShingle | Atsushi Ishizawa Tadashi Nishikawa Kenichi Hitachi Tomoya Akatsuka Katsuya Oguri Optical-referenceless optical frequency counter with twelve-digit absolute accuracy Scientific Reports |
| title | Optical-referenceless optical frequency counter with twelve-digit absolute accuracy |
| title_full | Optical-referenceless optical frequency counter with twelve-digit absolute accuracy |
| title_fullStr | Optical-referenceless optical frequency counter with twelve-digit absolute accuracy |
| title_full_unstemmed | Optical-referenceless optical frequency counter with twelve-digit absolute accuracy |
| title_short | Optical-referenceless optical frequency counter with twelve-digit absolute accuracy |
| title_sort | optical referenceless optical frequency counter with twelve digit absolute accuracy |
| url | https://doi.org/10.1038/s41598-023-35674-8 |
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