A Polarization-Insensitive Recirculating Delayed Self-Heterodyne Method for Sub-Kilohertz Laser Linewidth Measurement
A polarization-insensitive recirculating delayed self-heterodyne method (PI-RDSHM) is proposed and demonstrated for the precise measurement of sub-kilohertz laser linewidths. By a unique combination of Faraday rotator mirrors (FRMs) in an interferometer, the polarization-induced fading is effectivel...
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| Format: | Article |
| Language: | English |
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MDPI AG
2021-04-01
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| Series: | Photonics |
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| Online Access: | https://www.mdpi.com/2304-6732/8/5/137 |
| _version_ | 1797536559193391104 |
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| author | Jing Gao Dongdong Jiao Xue Deng Jie Liu Linbo Zhang Qi Zang Xiang Zhang Tao Liu Shougang Zhang |
| author_facet | Jing Gao Dongdong Jiao Xue Deng Jie Liu Linbo Zhang Qi Zang Xiang Zhang Tao Liu Shougang Zhang |
| author_sort | Jing Gao |
| collection | DOAJ |
| description | A polarization-insensitive recirculating delayed self-heterodyne method (PI-RDSHM) is proposed and demonstrated for the precise measurement of sub-kilohertz laser linewidths. By a unique combination of Faraday rotator mirrors (FRMs) in an interferometer, the polarization-induced fading is effectively reduced without any active polarization control. This passive polarization-insensitive operation is theoretically analyzed and experimentally verified. Benefited from the recirculating mechanism, a series of stable beat spectra with different delay times can be measured simultaneously without changing the length of delay fiber. Based on Voigt profile fitting of high-order beat spectra, the average Lorentzian linewidth of the laser is obtained. The PI-RDSHM has advantages of polarization insensitivity, high resolution, and less statistical error, providing an effective tool for accurate measurement of sub-kilohertz laser linewidth. |
| first_indexed | 2024-03-10T12:02:27Z |
| format | Article |
| id | doaj.art-0766957e722c453590cd14ae2133d3cd |
| institution | Directory Open Access Journal |
| issn | 2304-6732 |
| language | English |
| last_indexed | 2024-03-10T12:02:27Z |
| publishDate | 2021-04-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Photonics |
| spelling | doaj.art-0766957e722c453590cd14ae2133d3cd2023-11-21T16:51:09ZengMDPI AGPhotonics2304-67322021-04-018513710.3390/photonics8050137A Polarization-Insensitive Recirculating Delayed Self-Heterodyne Method for Sub-Kilohertz Laser Linewidth MeasurementJing Gao0Dongdong Jiao1Xue Deng2Jie Liu3Linbo Zhang4Qi Zang5Xiang Zhang6Tao Liu7Shougang Zhang8National Time Service Center, Chinese Academy of Sciences, Xi’an 710600, ChinaNational Time Service Center, Chinese Academy of Sciences, Xi’an 710600, ChinaNational Time Service Center, Chinese Academy of Sciences, Xi’an 710600, ChinaNational Time Service Center, Chinese Academy of Sciences, Xi’an 710600, ChinaNational Time Service Center, Chinese Academy of Sciences, Xi’an 710600, ChinaNational Time Service Center, Chinese Academy of Sciences, Xi’an 710600, ChinaNational Time Service Center, Chinese Academy of Sciences, Xi’an 710600, ChinaNational Time Service Center, Chinese Academy of Sciences, Xi’an 710600, ChinaNational Time Service Center, Chinese Academy of Sciences, Xi’an 710600, ChinaA polarization-insensitive recirculating delayed self-heterodyne method (PI-RDSHM) is proposed and demonstrated for the precise measurement of sub-kilohertz laser linewidths. By a unique combination of Faraday rotator mirrors (FRMs) in an interferometer, the polarization-induced fading is effectively reduced without any active polarization control. This passive polarization-insensitive operation is theoretically analyzed and experimentally verified. Benefited from the recirculating mechanism, a series of stable beat spectra with different delay times can be measured simultaneously without changing the length of delay fiber. Based on Voigt profile fitting of high-order beat spectra, the average Lorentzian linewidth of the laser is obtained. The PI-RDSHM has advantages of polarization insensitivity, high resolution, and less statistical error, providing an effective tool for accurate measurement of sub-kilohertz laser linewidth.https://www.mdpi.com/2304-6732/8/5/137the linewidth measurement of narrow laserrecirculating delayed looppolarization insensitivityself-heterodyne of beat spectrum |
| spellingShingle | Jing Gao Dongdong Jiao Xue Deng Jie Liu Linbo Zhang Qi Zang Xiang Zhang Tao Liu Shougang Zhang A Polarization-Insensitive Recirculating Delayed Self-Heterodyne Method for Sub-Kilohertz Laser Linewidth Measurement Photonics the linewidth measurement of narrow laser recirculating delayed loop polarization insensitivity self-heterodyne of beat spectrum |
| title | A Polarization-Insensitive Recirculating Delayed Self-Heterodyne Method for Sub-Kilohertz Laser Linewidth Measurement |
| title_full | A Polarization-Insensitive Recirculating Delayed Self-Heterodyne Method for Sub-Kilohertz Laser Linewidth Measurement |
| title_fullStr | A Polarization-Insensitive Recirculating Delayed Self-Heterodyne Method for Sub-Kilohertz Laser Linewidth Measurement |
| title_full_unstemmed | A Polarization-Insensitive Recirculating Delayed Self-Heterodyne Method for Sub-Kilohertz Laser Linewidth Measurement |
| title_short | A Polarization-Insensitive Recirculating Delayed Self-Heterodyne Method for Sub-Kilohertz Laser Linewidth Measurement |
| title_sort | polarization insensitive recirculating delayed self heterodyne method for sub kilohertz laser linewidth measurement |
| topic | the linewidth measurement of narrow laser recirculating delayed loop polarization insensitivity self-heterodyne of beat spectrum |
| url | https://www.mdpi.com/2304-6732/8/5/137 |
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