摘要
提出并实现了一种基于均匀光纤布拉格光栅(Uniform fiber Bragg grating,UFBG)和双环复合子腔滤波器的可调谐单纵模掺铥光纤激光器。3 dB带宽为0.18 nm的UFBG作为波长选择器件,与可进行模式选择的双环复合子腔滤波器相结合,实现了单纵模激光输出。测得激光器的输出波长为2048.69 nm,光信噪比为71.82 dB。60 min内的最大波长和功率波动分别为0.03 nm和0.76 dB。此外,激光器的相对强度噪声在>0.5 MHz时,低于-127.81 dB/Hz;采用基于3×3耦合器的非平衡迈克尔逊干涉仪装置测得0.001 s时激光线宽为7.7196 kHz。通过调整微位移平台改变作用在均匀光栅上的应力,单纵模激光实现了5.1 nm范围可调谐输出。
A tunable single-longitudinal-mode thulium-doped fiber laser based on a uniform fiber Bragg grating(UFBG)and a double-ring compound sub-cavity filter is proposed and verified.A UFBG with a 0.18-nm reflection peak as wavelength-switchable element and a double-ring compound sub-cavity filter as the mode-selection mechanism are combined to realize the single‐longithudinal‐mode(SLM)laser.The wavelength of the laser was 2048.69 nm and the optical signal-to-noise ratio was 71.82 dB.The maximum wavelength and power fluctuations within 60 min are found to be 0.03 nm and 0.76 dB,respectively.Moreover,the relative intensity noise is below-127.81 dB/Hz above 0.5 MHz.The laser linewidth at 0.001 s was measured as 7.7196 kHz using an imbalanced Michelson interferometer composed of a 3×3 coupler.The lasing achieves a wide tunable range of 5.1 nm,which is obtained by tuning the micro-displacement platform to transform the strain on the UFBG.
作者
关彪
延凤平
冯亭
杨丹丹
秦齐
李挺
于晨昊
王向东
姜有超
熊本和夫
索玉平
GUAN Biao;YAN Fengping;FENG Ting;YANG Dandan;QIN Qi;LI Ting;YU Chenhao;WANG Xiangdong;JIANG Youchao;KUMAMOTO Kazuo;SUO Yuping(School of Electronic and Information Engineering,Beijing Jiaotong University,Beijing 100044,China;Photonics Information Innovation Center,College of Physics Science&Technology,Hebei University,Baoding 071002,China;Department of Electronics,Information and Communication Engineering,Osaka Institute of Technology,Osaka 999001,Japan;Department of Gynecology and Obstetrics,The Fifth Clinical Medical College of Shanxi Medical University,Taiyuan 030012,China)
出处
《发光学报》
EI
CAS
CSCD
北大核心
2023年第8期1479-1486,共8页
Chinese Journal of Luminescence
基金
国家自然科学基金(61827818,61975049,62005013,61975105)。
关键词
光纤激光器
掺铥光纤
单纵模
双环复合子腔滤波器
fiber laser
thulium-doped fiber
single-longitudinal-mode
double-ring compound sub-cavity filter
