Tunable Single-Longitudinal-Mode Thulium–Holmium Co-Doped Fiber Laser with an Ultra-Narrow Linewidth by Utilizing a Triple-Ring Passive Sub-Ring Resonator
A low-cost, wavelength-tunable single-longitudinal-mode (SLM) thulium–holmium co-doped fiber laser (THDFL) in a 2 μm band with a simple structure is described in the present paper. To obtain a stable SLM and narrow laser linewidth, a five-coupler-based three-ring (FCTR) filter is utilized in the rin...
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MDPI AG
2024-12-01
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| Series: | Photonics |
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| Online Access: | https://www.mdpi.com/2304-6732/12/1/19 |
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| author | Pengfei Wang Fengping Yan Qi Qin Dandan Yang Ting Feng Peng Liu Ting Li Chenhao Yu Xiangdong Wang Hao Guo Yuezhi Cai Wenjie Ji Youchao Jiang |
| author_facet | Pengfei Wang Fengping Yan Qi Qin Dandan Yang Ting Feng Peng Liu Ting Li Chenhao Yu Xiangdong Wang Hao Guo Yuezhi Cai Wenjie Ji Youchao Jiang |
| author_sort | Pengfei Wang |
| collection | DOAJ |
| description | A low-cost, wavelength-tunable single-longitudinal-mode (SLM) thulium–holmium co-doped fiber laser (THDFL) in a 2 μm band with a simple structure is described in the present paper. To obtain a stable SLM and narrow laser linewidth, a five-coupler-based three-ring (FCTR) filter is utilized in the ring cavity of the fiber laser. Tunable SLM wavelength output from THDFLs with kHz linewidths can be achieved by designing the FCTR filter with an effective free-spectral range and a 3 dB bandwidth at the main resonant peak. The measurement results show that the laser is in the SLM lasing state, with a highly stabilized optical spectrum, a linewidth of approximately 9.45 kHz, an optical signal-to-noise ratio as high as 73.6 dB, and a relative intensity noise of less than −142.66 dB/Hz. Furthermore, the wavelength can be tuned in the range of 2.6 nm. The proposed fiber laser has a wide range of applications, including coherence optical communication, optical fiber sensing, and dense wavelength-division-multiplexing. |
| format | Article |
| id | doaj-art-dc831baf9dcd4a94b594eb29a81925ce |
| institution | Kabale University |
| issn | 2304-6732 |
| language | English |
| publishDate | 2024-12-01 |
| publisher | MDPI AG |
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| series | Photonics |
| spelling | doaj-art-dc831baf9dcd4a94b594eb29a81925ce2025-01-24T13:46:12ZengMDPI AGPhotonics2304-67322024-12-011211910.3390/photonics12010019Tunable Single-Longitudinal-Mode Thulium–Holmium Co-Doped Fiber Laser with an Ultra-Narrow Linewidth by Utilizing a Triple-Ring Passive Sub-Ring ResonatorPengfei Wang0Fengping Yan1Qi Qin2Dandan Yang3Ting Feng4Peng Liu5Ting Li6Chenhao Yu7Xiangdong Wang8Hao Guo9Yuezhi Cai10Wenjie Ji11Youchao Jiang12School of Electronic and Information Engineering, Beijing Jiaotong University, Beijing 100044, ChinaSchool of Electronic and Information Engineering, Beijing Jiaotong University, Beijing 100044, ChinaSchool of Mechanical and Electrical Engineering, Xingtai University, Xingtai 054001, ChinaSchool of Electronic and Information Engineering, Beijing Jiaotong University, Beijing 100044, ChinaHebei Key Laboratory of Micro-Nano Precision Optical Sensing and Measurement Technology, Northeastern University at Qinhuangdao, Qinhuangdao 066004, ChinaSchool of Mechanical and Electrical Engineering, Xingtai University, Xingtai 054001, ChinaSchool of Physical Science and Engineering, Beijing Jiaotong University, Beijing 100044, ChinaSchool of Electronic and Information Engineering, Beijing Jiaotong University, Beijing 100044, ChinaSchool of Electronic and Information Engineering, Beijing Jiaotong University, Beijing 100044, ChinaSchool of Electronic and Information Engineering, Beijing Jiaotong University, Beijing 100044, ChinaSchool of Electronic and Information Engineering, Beijing Jiaotong University, Beijing 100044, ChinaSchool of Electronic and Information Engineering, Beijing Jiaotong University, Beijing 100044, ChinaSchool of Electronic and Information Engineering, Beijing Jiaotong University, Beijing 100044, ChinaA low-cost, wavelength-tunable single-longitudinal-mode (SLM) thulium–holmium co-doped fiber laser (THDFL) in a 2 μm band with a simple structure is described in the present paper. To obtain a stable SLM and narrow laser linewidth, a five-coupler-based three-ring (FCTR) filter is utilized in the ring cavity of the fiber laser. Tunable SLM wavelength output from THDFLs with kHz linewidths can be achieved by designing the FCTR filter with an effective free-spectral range and a 3 dB bandwidth at the main resonant peak. The measurement results show that the laser is in the SLM lasing state, with a highly stabilized optical spectrum, a linewidth of approximately 9.45 kHz, an optical signal-to-noise ratio as high as 73.6 dB, and a relative intensity noise of less than −142.66 dB/Hz. Furthermore, the wavelength can be tuned in the range of 2.6 nm. The proposed fiber laser has a wide range of applications, including coherence optical communication, optical fiber sensing, and dense wavelength-division-multiplexing.https://www.mdpi.com/2304-6732/12/1/19single-longitudinal-modethulium–holmium co-doped fiber laserfive-coupler-based three-ring filterrelative intensity noise |
| spellingShingle | Pengfei Wang Fengping Yan Qi Qin Dandan Yang Ting Feng Peng Liu Ting Li Chenhao Yu Xiangdong Wang Hao Guo Yuezhi Cai Wenjie Ji Youchao Jiang Tunable Single-Longitudinal-Mode Thulium–Holmium Co-Doped Fiber Laser with an Ultra-Narrow Linewidth by Utilizing a Triple-Ring Passive Sub-Ring Resonator Photonics single-longitudinal-mode thulium–holmium co-doped fiber laser five-coupler-based three-ring filter relative intensity noise |
| title | Tunable Single-Longitudinal-Mode Thulium–Holmium Co-Doped Fiber Laser with an Ultra-Narrow Linewidth by Utilizing a Triple-Ring Passive Sub-Ring Resonator |
| title_full | Tunable Single-Longitudinal-Mode Thulium–Holmium Co-Doped Fiber Laser with an Ultra-Narrow Linewidth by Utilizing a Triple-Ring Passive Sub-Ring Resonator |
| title_fullStr | Tunable Single-Longitudinal-Mode Thulium–Holmium Co-Doped Fiber Laser with an Ultra-Narrow Linewidth by Utilizing a Triple-Ring Passive Sub-Ring Resonator |
| title_full_unstemmed | Tunable Single-Longitudinal-Mode Thulium–Holmium Co-Doped Fiber Laser with an Ultra-Narrow Linewidth by Utilizing a Triple-Ring Passive Sub-Ring Resonator |
| title_short | Tunable Single-Longitudinal-Mode Thulium–Holmium Co-Doped Fiber Laser with an Ultra-Narrow Linewidth by Utilizing a Triple-Ring Passive Sub-Ring Resonator |
| title_sort | tunable single longitudinal mode thulium holmium co doped fiber laser with an ultra narrow linewidth by utilizing a triple ring passive sub ring resonator |
| topic | single-longitudinal-mode thulium–holmium co-doped fiber laser five-coupler-based three-ring filter relative intensity noise |
| url | https://www.mdpi.com/2304-6732/12/1/19 |
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