一种高稳定DBR型掺铒光纤激光器研究

Study on DBR Er^(3+)-doped Fiber Laser of High Stability

研制了一种高功率高边模抑制比及高波长稳定性的DBR型掺铒光纤激光器。该激光器使用980nmLD作为泵浦源,并使用长度为2.75m的高掺杂浓度的掺饵光纤作为增益介质,在1.55μm波段获得了3dB线宽为0.2nm,25dB线宽为0.4nm的激光输出。最大输出光功率25mW,输出功率稳定性±0.01dB,边模抑制比60dB,波长稳定性0.01dB(受光功率计精度的限制),阈值泵浦光功率8.6mW,斜率效率21.7%。

One DBR Er3+doped fiber laser of high output power and high wavelength stability was developed. Its gain medium was 2.75m long Er3+doped fiber of high erbium concentration. When it was pumped by 980nm laserdiode, the output spectral bandwidth was measured as 0.2nm by 3dB and 0.4nm by 25dB at 1552.2nm. The max. output power was measured as 25mW. Its power stability was ±0.01dB, side mode suppression ratio was 60dB, and the stability of output wavelength was 0.01dB(Confined by the precision of OPM). The laser had a threshold of 8.6mW and a slope efficiency of 21.7%.