Polarized millijoule fiber laser system with high beam quality and pulse shaping ability
| Autor: | Qihua Zhu, Xiaocheng Tian, Zhou Dandan, Li Hongxun, Rui Zhang, Jingqin Su, Dangpeng Xu, Na Zhu, Mengqiu Fan, Zhihua Huang, Feng Jing, Zong Zhaoyu |
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| Rok vydání: | 2017 |
| Předmět: |
Distributed feedback laser
Materials science business.industry Physics::Optics 02 engineering and technology Injection seeder 021001 nanoscience & nanotechnology Laser 01 natural sciences Beam parameter product law.invention 010309 optics Optics law Fiber laser 0103 physical sciences M squared Laser power scaling Laser beam quality 0210 nano-technology business |
| Zdroj: | SPIE Proceedings. |
| ISSN: | 0277-786X |
| DOI: | 10.1117/12.2264970 |
| Popis: | The coherent amplification network (CAN) aims at developing a laser system based on the coherent combination of multiple laser beams, which are produced through a network of high beam quality optical fiber amplifiers. The scalability of the CAN laser facilitates the development of many novel applications, such as fiber-based acceleration, orbital debris removal and inertial confinement fusion energy. According to the requirements of CAN and the front end of high-power laser facilities, a millijoule polarized fiber laser system was studied in this paper. Using polarization maintaining Ytterbium-fiber laser system as the seed, and 10-μm core Yb-doped fiber amplifier as the first power amplifier and 40-μm core polarizing (PZ) photonic crystal fiber (PCF) as the second power amplifier, the all-fiber laser system outputs 1.06-mJ energy at 10 ns and diffraction limited mode quality. Using 85-μm rod-type PCF as the third power amplifiers, 2.5-mJ energy at 10-ns pulse width was obtained with better than 500:1 peak-to-foot pulse shaping ability and fundamental mode beam quality. The energy fluctuation of the system is 1.3% rms with 1-mJ output in one hour. When using phase-modulated pulse as the seed, the frequency modulation to amplitude modulation (FM-to-AM) conversion ratio of the system is better than 5%. This fiber laser system has the advantages of high beam quality, high beam shaping ability, good stability, small volume and free of maintenance, which can be used in many applications. |
| Databáze: | OpenAIRE |
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