Wysocki P F, Digonnet M J, Kim B Y
Opt Lett. 1990 Aug 15;15(16):879-81. doi: 10.1364/ol.15.000879.
We describe an argon-ion-laser-pumped erbium-doped fiber laser at 1.55 microm that incorporates low-rate frequency modulation of an intracavity acousto-optic modulator to provide repeated, continuous tuning of the output spectrum. The spectral width of this wavelength-swept fiber laser is as large as 20 nm with 9 mW of output power, even though erbium in silica has a mostly homogeneously broadened gain. The time-averaged visibility curve for a 14-nm-wide source indicates a short (160-microm) coherence length, which is of interest for fiber-optic gyroscopes that operate with long integration times and short-coherence-length sources.
我们描述了一种波长为1.55微米的氩离子激光泵浦掺铒光纤激光器，它通过对腔内声光调制器进行低速率频率调制，实现输出光谱的重复连续调谐。尽管二氧化硅中的铒增益大多为均匀展宽，但这种扫频光纤激光器在输出功率为9毫瓦时，光谱宽度可达20纳米。对于一个14纳米宽的光源，其时间平均可见度曲线表明相干长度较短（160微米），这对于使用长积分时间和短相干长度光源的光纤陀螺仪来说很有意义。
