Linewidth Reduction by Feedforward Locking a Laser Diode to a Femtosecond Comb Line
We propose and demonstrate a novel method to narrow the linewidth of a laser diode at 1550 nm by an electronics-assisted feedforward path and weak locking to a femtosecond comb line simultaneously. By using a femtosecond comb as an ideal ultranarrow-linewidth optical reference, the laser...
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| Format: | Article |
| Language: | English |
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IEEE
2016-01-01
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| Series: | IEEE Photonics Journal |
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| Online Access: | https://ieeexplore.ieee.org/document/7548361/ |
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| author | Ziping Zhang Yitang Dai Pan Ou Feifei Yin Yue Zhou Jianqiang Li Kun Xu |
| author_facet | Ziping Zhang Yitang Dai Pan Ou Feifei Yin Yue Zhou Jianqiang Li Kun Xu |
| author_sort | Ziping Zhang |
| collection | DOAJ |
| description | We propose and demonstrate a novel method to narrow the linewidth of a laser diode at 1550 nm by an electronics-assisted feedforward path and weak locking to a femtosecond comb line simultaneously. By using a femtosecond comb as an ideal ultranarrow-linewidth optical reference, the laser diode is down converted, and its phase noise is “recorded” by the resulted intermediate frequency tone, which is filtered by a 40-MHz electronic filter. The consequentially introduced electronic delay is designed to match the optical delay, which is experienced by the same laser diode for upconversion. The delay match ensures that the phase noise of laser diode can be counteracted by its former “record” in upconversion and realizes linewidth reduction. As a result, the 20-dB linewidth of final radiation has been measured as 26 kHz, which is 1/35 of that of the laser diode. |
| format | Article |
| id | doaj-art-4a283404580e4a289eebe5f11cbc3d86 |
| institution | Kabale University |
| issn | 1943-0655 |
| language | English |
| publishDate | 2016-01-01 |
| publisher | IEEE |
| record_format | Article |
| series | IEEE Photonics Journal |
| spelling | doaj-art-4a283404580e4a289eebe5f11cbc3d862025-08-20T03:51:53ZengIEEEIEEE Photonics Journal1943-06552016-01-01851710.1109/JPHOT.2016.26009437548361Linewidth Reduction by Feedforward Locking a Laser Diode to a Femtosecond Comb LineZiping Zhang0Yitang Dai1Pan Ou2Feifei Yin3Yue Zhou4Jianqiang Li5Kun Xu6State Key Laboratory of Information Photonics and Optical Communications, Beijing University of Posts and Telecommunications, Beijing, ChinaState Key Laboratory of Information Photonics and Optical Communications, Beijing University of Posts and Telecommunications, Beijing, ChinaSchool of Instrument Science and Optoelectronic Engineering, Beihang University, Beijing, ChinaState Key Laboratory of Information Photonics and Optical Communications, Beijing University of Posts and Telecommunications, Beijing, ChinaState Key Laboratory of Information Photonics and Optical Communications, Beijing University of Posts and Telecommunications, Beijing, ChinaState Key Laboratory of Information Photonics and Optical Communications, Beijing University of Posts and Telecommunications, Beijing, ChinaState Key Laboratory of Information Photonics and Optical Communications, Beijing University of Posts and Telecommunications, Beijing, ChinaWe propose and demonstrate a novel method to narrow the linewidth of a laser diode at 1550 nm by an electronics-assisted feedforward path and weak locking to a femtosecond comb line simultaneously. By using a femtosecond comb as an ideal ultranarrow-linewidth optical reference, the laser diode is down converted, and its phase noise is “recorded” by the resulted intermediate frequency tone, which is filtered by a 40-MHz electronic filter. The consequentially introduced electronic delay is designed to match the optical delay, which is experienced by the same laser diode for upconversion. The delay match ensures that the phase noise of laser diode can be counteracted by its former “record” in upconversion and realizes linewidth reduction. As a result, the 20-dB linewidth of final radiation has been measured as 26 kHz, which is 1/35 of that of the laser diode.https://ieeexplore.ieee.org/document/7548361/Photon sourcesmicrowave photonicselectro-optical systems |
| spellingShingle | Ziping Zhang Yitang Dai Pan Ou Feifei Yin Yue Zhou Jianqiang Li Kun Xu Linewidth Reduction by Feedforward Locking a Laser Diode to a Femtosecond Comb Line IEEE Photonics Journal Photon sources microwave photonics electro-optical systems |
| title | Linewidth Reduction by Feedforward Locking a Laser Diode to a Femtosecond Comb Line |
| title_full | Linewidth Reduction by Feedforward Locking a Laser Diode to a Femtosecond Comb Line |
| title_fullStr | Linewidth Reduction by Feedforward Locking a Laser Diode to a Femtosecond Comb Line |
| title_full_unstemmed | Linewidth Reduction by Feedforward Locking a Laser Diode to a Femtosecond Comb Line |
| title_short | Linewidth Reduction by Feedforward Locking a Laser Diode to a Femtosecond Comb Line |
| title_sort | linewidth reduction by feedforward locking a laser diode to a femtosecond comb line |
| topic | Photon sources microwave photonics electro-optical systems |
| url | https://ieeexplore.ieee.org/document/7548361/ |
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