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我们利用一只带通滤波器和一段作为饱和吸收体的掺杂光纤获得了３ｄＢ带宽小于０．０７ｎｍ的窄线宽激光输出。实验中所用增益光纤长度约１５ｍ，掺Ｙｂ浓度以吸收系数表示，即在９２０ｎｍ波长处的吸收为６．６ｄＢ／ｍ。抽运源为一带尾纤输出的半导体激光器（ＬＤ），其中心
Using a band-pass filter and a section of doped fiber as a saturable absorber, we obtained a narrow linewidth laser output with a 3dB bandwidth of less than 0.07 nm. The length of the gain fiber used in the experiment is about 15 m, and the Yb concentration is expressed as the absorption coefficient, that is, the absorption at the wavelength of 920 nm is 6.6 dB / m. The pump source is a pigtailed output semiconductor laser (LD) centered at it