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Sub-kilohertz linewidth fiber laser by using Bragg grating filters

机译：使用布拉格光栅过滤器亚千赫兹线宽光纤激光器

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摘要

A single-frequency (SF) fiber laser is widely applied in many fields. A superior ultra-narrow-bandwidth fiber filter, which consists of an in-series commercial common fiber Bragg grating (FBG) filters with a partial overlap in their reflection spectrum, is presented in this paper. The bandwidth of the filter with a center reflection wavelength of 1549.83 nm reaches 0.024 nm at 3 dB reflection, a remarkable reduction of approximately 300% by combination usage narrower than a single FBG used bandwidth. We also demonstrate a method to further narrowing of the filter bandwidth by increasing the usage times of filters, and the bandwidth can reach 0.0025 nm at 3 dB reflection. A long linear cavity single-frequency fiber laser with an entire cavity of 30 cm is implemented with the linewidth of 941 Hz at 3 dB, which is about 210% narrower than the previous record of SF fiber laser based on FBG filters in a linear cavity. This research may open a new door toward ultra-narrow-bandwidth filters and SF fiber lasers. (C) 2021 Optical Society of America
机译：单频光纤激光器在许多领域有着广泛的应用。本文提出了一种优越的超窄带光纤滤波器，它由一个串联的商用光纤布拉格光栅（FBG）滤波器组成，其反射光谱部分重叠。中心反射波长为1549.83 nm的滤波器在3 dB反射下的带宽达到0.024 nm，通过组合使用，比单个FBG使用的带宽窄，显著减少了约300%。我们还展示了一种通过增加滤波器使用次数来进一步缩小滤波器带宽的方法，在3dB反射下，带宽可以达到0.0025nm。实现了一个长线性腔单频光纤激光器，整个腔为30cm，线宽为941hz，3db，比以前基于线性腔中FBG滤波器的SF光纤激光器窄约210%。这项研究可能为超窄带宽滤波器和SF光纤激光器打开一扇新的大门。（2021）美国光学学会

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  • 来源
    《Applied optics》 |2021年第15期|共6页
  • 作者

    Wen Qiao; Sun Zhihao; Gan Yiyu; Li Ji;

  • 作者单位

    Shenzhen Univ Coll Phys &

    Optoelect Engn Key Lab Optoelect Devices &

    Syst Minist Educ &

    Guangdong Prov Shenzhen 518060 Peoples R China;

    Shenzhen Univ Coll Phys &

    Optoelect Engn Key Lab Optoelect Devices &

    Syst Minist Educ &

    Guangdong Prov Shenzhen 518060 Peoples R China;

    Shenzhen Univ Coll Phys &

    Optoelect Engn Key Lab Optoelect Devices &

    Syst Minist Educ &

    Guangdong Prov Shenzhen 518060 Peoples R China;

    Shenzhen Univ Coll Phys &

    Optoelect Engn Key Lab Optoelect Devices &

    Syst Minist Educ &

    Guangdong Prov Shenzhen 518060 Peoples R China;

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  • 正文语种 eng
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