| FUNDAMENTAL AREAS OF PHENOMENOLOGY(INCLUDING APPLICATIONS) |
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Narrow Linewidth Tm3+-Doped Large Core Fiber Laser Based on a Femtosecond Written Fiber Bragg Grating |
ZHANG Yun-Jun, WANG Wei, ZHOU Ren-Lai, SONG Shi-Fei, TIAN Yi, WANG Yue-Zhu |
| National Key Laboratory of Tunable Laser Technology, Harbin Institute of Technology, Harbin 150001 |
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| Cite this article: |
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ZHANG Yun-Jun, WANG Wei, ZHOU Ren-Lai et al 2010 Chin. Phys. Lett. 27 074214 |
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Abstract A diode laser (LD) clad-pumped narrow linewidth all-fiber Tm3+-doped fiber laser is reported with a maximal output power of 27 W at 1.947μm. By successively splicing an LD pigtail fiber, a single-mode Tm3+-doped fiber, and a multi-mode Tm3+-doped fiber, the fiber laser has 70 pm narrow linewidth output, and a high slope efficiency of nearly 47.5% with respect to the launched pump power. The high reflectivity fiber Bragg gratings, which are directly written into the single-mode Tm3+-doped fiber core by the 800 nm femtosecond pulsed laser, act as the high reflectivity coupler. The output laser has diffraction-limited beam quality with a factor M2 of 1.29, when the output laser power is nearly 27 W.
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| Keywords:
42.55.Wd
42.60.Jf
42.81.Qb
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Received: 12 November 2009
Published: 28 June 2010
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| PACS: |
42.55.Wd
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(Fiber lasers)
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42.60.Jf
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(Beam characteristics: profile, intensity, and power; spatial pattern formation)
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42.81.Qb
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(Fiber waveguides, couplers, and arrays)
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