Characteristics of rational harmonic mode‑locked short‑cavity fiber ring laser using a bismuth‑oxide-based erbium‑doped fiber and a bismuth‑oxide‑based highly nonlinear fiber.
Characteristics of rational harmonic mode‑locked short‑cavity fiber ring laser using a bismuth‑oxide-based erbium‑doped fiber and a bismuth‑oxide‑based highly nonlinear fiber.
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DOI：
10.1364/oe.19.022502
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发表时间：
2011-11
期刊：
影响因子：
3.8
通讯作者：
Y. Fukuchi;J. Maeda
中科院分区：
文献类型：
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作者：
Y. Fukuchi;J. Maeda
我们展示了一种合理谐波锁模光纤环形激光器，采用了151厘米长的氧化铋基掺铒光纤（Bi-EDF）和250厘米长的氧化铋基高度非线性光纤（Bi-HNLF）。利用Bi-EDF的宽增益带宽，可以实现覆盖常规波段和较长波带的连续波长调谐。通过调整腔内调制器的调制参数，也可以使脉冲幅度均衡。Bi-HNLF的超高非线性特性与光带通滤波器的光谱滤波相结合，有效地抑制了超模噪声。总空腔长度短至10 m。在整个波长调谐范围内，可以成功地产生高达40 GHz的稳定和振幅均衡脉冲。
We demonstrate a rational harmonic mode-locked fiber ring laser employing a 151-cm-long bismuth-oxide-based erbium-doped fiber (Bi-EDF) and a 250-cm-long bismuth-oxide-based highly nonlinear fiber (Bi-HNLF). Continuous wavelength tuning covering both the conventional wavelength band and the longer wavelength band can be achieved by utilizing the wide gain bandwidth of the Bi-EDF. The pulse amplitude can also be equalized by adjusting the modulation parameters of the intracavity modulator. Ultra-high nonlinearity of the Bi-HNLF collaborates with spectral filtering by an optical bandpass filter to suppress the supermode noise quite effectively. The total cavity length is as short as 10 m. Stable and amplitude equalized pulses up to 40 GHz can be successfully generated over the entire wavelength tuning range.