5 kW Near-Diffraction-Limited and 8 kW High-Brightness Monolithic Continuous Wave Fiber Lasers Directly Pumped by Laser Diodes
Tandem pumping technique are traditionally adopted to develop >3-kW continuous-wave (cw) Yb<sup>3+</sup>-doped fiber lasers, which are usually pumped by other fiber lasers at shorter wavelengths (1018 nm e.g.,). Fiber lasers directly pumped by laser diode...
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IEEE
2017-01-01
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| Series: | IEEE Photonics Journal |
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| Online Access: | https://ieeexplore.ieee.org/document/8025378/ |
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| author | Qiang Fang Jinhui Li Wei Shi Yuguo Qin Yang Xu Xiangjie Meng Robert A. Norwood Nasser Peyghambarian |
| author_facet | Qiang Fang Jinhui Li Wei Shi Yuguo Qin Yang Xu Xiangjie Meng Robert A. Norwood Nasser Peyghambarian |
| author_sort | Qiang Fang |
| collection | DOAJ |
| description | Tandem pumping technique are traditionally adopted to develop >3-kW continuous-wave (cw) Yb<sup>3+</sup>-doped fiber lasers, which are usually pumped by other fiber lasers at shorter wavelengths (1018 nm e.g.,). Fiber lasers directly pumped by laser diodes have higher wall-plug efficiency and are more compact. Here we report two high brightness monolithic cw fiber laser sources at 1080 nm. Both lasers consist of a cw fiber laser oscillator and one laser-diode pumped double cladding fiber amplifier in the master oscillator-power amplifier configuration. One laser, using 30-μm-core Yb<sup>3+</sup>-doped fiber as the gain medium, can produce >5-kW average laser power with near diffraction-limited beam quality (M<sup>2</sup><1.8). The slope efficiency of the fiber amplifier with respect to the launched pump power reached 86.5%. The other laser utilized 50-μm-core Yb<sup>3+</sup>-doped fiber as the gain medium and produced >8-kW average laser power with high beam quality (M<sup>2</sup>: ∼ 4). The slope efficiency of the fiber amplifier with respect to the launched pump power reach 83%. To the best of our knowledge, this is the first detailed report for >5-kW near-diffraction-limited and >8-kW high-brightness monolithic fiber lasers directly pumped by laser diodes. |
| format | Article |
| id | doaj-art-181cdf0a0bce433588cd520117ee2d25 |
| institution | DOAJ |
| issn | 1943-0655 |
| language | English |
| publishDate | 2017-01-01 |
| publisher | IEEE |
| record_format | Article |
| series | IEEE Photonics Journal |
| spelling | doaj-art-181cdf0a0bce433588cd520117ee2d252025-08-20T02:44:40ZengIEEEIEEE Photonics Journal1943-06552017-01-01951710.1109/JPHOT.2017.274480380253785 kW Near-Diffraction-Limited and 8 kW High-Brightness Monolithic Continuous Wave Fiber Lasers Directly Pumped by Laser DiodesQiang Fang0Jinhui Li1Wei Shi2Yuguo Qin3Yang Xu4Xiangjie Meng5Robert A. Norwood6Nasser Peyghambarian7College of Precision Instrument and Optoelectronics Engineering, Tianjin University, Tianjin, ChinaCollege of Precision Instrument and Optoelectronics Engineering, Tianjin University, Tianjin, ChinaCollege of Precision Instrument and Optoelectronics Engineering, Tianjin University, Tianjin, ChinaHFB Photonics Co., Ltd., Shandong, ChinaHFB Photonics Co., Ltd., Shandong, ChinaTianjin Optera Laser Technology Co., Ltd., Tianjin, ChinaCollege of Optical Sciences, University of Arizona, Tucson, AZ, USACollege of Optical Sciences, University of Arizona, Tucson, AZ, USATandem pumping technique are traditionally adopted to develop >3-kW continuous-wave (cw) Yb<sup>3+</sup>-doped fiber lasers, which are usually pumped by other fiber lasers at shorter wavelengths (1018 nm e.g.,). Fiber lasers directly pumped by laser diodes have higher wall-plug efficiency and are more compact. Here we report two high brightness monolithic cw fiber laser sources at 1080 nm. Both lasers consist of a cw fiber laser oscillator and one laser-diode pumped double cladding fiber amplifier in the master oscillator-power amplifier configuration. One laser, using 30-μm-core Yb<sup>3+</sup>-doped fiber as the gain medium, can produce >5-kW average laser power with near diffraction-limited beam quality (M<sup>2</sup><1.8). The slope efficiency of the fiber amplifier with respect to the launched pump power reached 86.5%. The other laser utilized 50-μm-core Yb<sup>3+</sup>-doped fiber as the gain medium and produced >8-kW average laser power with high beam quality (M<sup>2</sup>: ∼ 4). The slope efficiency of the fiber amplifier with respect to the launched pump power reach 83%. To the best of our knowledge, this is the first detailed report for >5-kW near-diffraction-limited and >8-kW high-brightness monolithic fiber lasers directly pumped by laser diodes.https://ieeexplore.ieee.org/document/8025378/Diode-pumped lasersfiber lasershigh powernear-diffraction-limitedytterbium-doped. |
| spellingShingle | Qiang Fang Jinhui Li Wei Shi Yuguo Qin Yang Xu Xiangjie Meng Robert A. Norwood Nasser Peyghambarian 5 kW Near-Diffraction-Limited and 8 kW High-Brightness Monolithic Continuous Wave Fiber Lasers Directly Pumped by Laser Diodes IEEE Photonics Journal Diode-pumped lasers fiber lasers high power near-diffraction-limited ytterbium-doped. |
| title | 5 kW Near-Diffraction-Limited and 8 kW High-Brightness Monolithic Continuous Wave Fiber Lasers Directly Pumped by Laser Diodes |
| title_full | 5 kW Near-Diffraction-Limited and 8 kW High-Brightness Monolithic Continuous Wave Fiber Lasers Directly Pumped by Laser Diodes |
| title_fullStr | 5 kW Near-Diffraction-Limited and 8 kW High-Brightness Monolithic Continuous Wave Fiber Lasers Directly Pumped by Laser Diodes |
| title_full_unstemmed | 5 kW Near-Diffraction-Limited and 8 kW High-Brightness Monolithic Continuous Wave Fiber Lasers Directly Pumped by Laser Diodes |
| title_short | 5 kW Near-Diffraction-Limited and 8 kW High-Brightness Monolithic Continuous Wave Fiber Lasers Directly Pumped by Laser Diodes |
| title_sort | 5 kw near diffraction limited and 8 kw high brightness monolithic continuous wave fiber lasers directly pumped by laser diodes |
| topic | Diode-pumped lasers fiber lasers high power near-diffraction-limited ytterbium-doped. |
| url | https://ieeexplore.ieee.org/document/8025378/ |
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