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Acta Optica Sinica, Volume. 39, Issue 3, 0306002(2019)

Design and Fabrication of Low-Loss Long-Period Fiber Gratings Operating at 2 μm Waveband

Le Liu1, Meng Wang1, Xiaoming Xi1,2,3, Zefeng Wang1,2,3、*, and Guomin Zhao1,2,3
Author Affiliations
  • 1 College of Advanced Interdisciplinary Studies, National University of Defense Technology, Changsha, Hunan 410073, China
  • 2 Hunan Provincial Key Laboratory of High Energy Laser Technology, National University of Defense Technology, Changsha, Hunan 410073, China
  • 3 Hunan Provincial Collaborative Innovation Center of High Power Fiber Laser, National University of Defense Technology, Changsha, Hunan 410073, China
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    Figures & Tables(5)
    Properties of single-mode fiber. (a) Refractive indexes of different modes; (b) phase matching curves

    Fig. 1. Properties of single-mode fiber. (a) Refractive indexes of different modes; (b) phase matching curves

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    Transmission spectra versus grating parameter. (a) Grating period; (b) modulation depth of refractive index; (c) number of periods

    Fig. 2. Transmission spectra versus grating parameter. (a) Grating period; (b) modulation depth of refractive index; (c) number of periods

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    Grating fabrication system. (a) Schematic of LPFG fabrication system; (b) microscopic structure of LPFG

    Fig. 3. Grating fabrication system. (a) Schematic of LPFG fabrication system; (b) microscopic structure of LPFG

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    Experimental results. (a) Transmission spectrum versus grating period (P=7.2 W, N=40, T=1000 ms); (b) resonant wavelength versus grating period; (c) transmission spectrum versus scanning cycle (Λ=750 μm, N=30, T=1000 ms); (d) resonant wavelength versus scanning cycle; (e) transmission spectrum versus number of cycles (Λ=750 μm, P=7.2 W, T=1000 ms)

    Fig. 4. Experimental results. (a) Transmission spectrum versus grating period (P=7.2 W, N=40, T=1000 ms); (b) resonant wavelength versus grating period; (c) transmission spectrum versus scanning cycle (Λ=750 μm, N=30, T=1000 ms); (d) resonant wavelength versus scanning cycle; (e) transmission spectrum versus number of cycles (Λ=750 μm, P=7.2 W, T=1000 ms)

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    Setup and test results of LPFG temperature characteristic testing. (a) Testing setup; (b) LPFG transmission spectrum versus temperature; (c) central wavelength of loss speak in transmission spectrum versus temperature

    Fig. 5. Setup and test results of LPFG temperature characteristic testing. (a) Testing setup; (b) LPFG transmission spectrum versus temperature; (c) central wavelength of loss speak in transmission spectrum versus temperature

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    Le Liu, Meng Wang, Xiaoming Xi, Zefeng Wang, Guomin Zhao. Design and Fabrication of Low-Loss Long-Period Fiber Gratings Operating at 2 μm Waveband[J]. Acta Optica Sinica, 2019, 39(3): 0306002

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    Paper Information

    Category: Fiber Optics and Optical Communications

    Received: Jul. 16, 2018

    Accepted: Oct. 21, 2018

    Published Online: May. 10, 2019

    The Author Email:

    DOI:10.3788/AOS201939.0306002

    Topics

    laser devices and laser physics
    Lasers and Laser Optics
    Laser physics
    laser manufacturing
    Instrumentation, Measurement and Metrology