Spectral control of a dispersion-tuned wavelength-swept laser
Spectral control of a dispersion-tuned wavelength-swept laser
复制标题
色散调谐波长扫描激光器的光谱控制
DOI：
10.1049/el.2016.3582
复制
发表时间：
2017
影响因子：
1.1
通讯作者：
Y. Takubo and S. Yamashita
中科院分区：
文献类型：
--
作者：
日置尚悟;田邉純樹;田浦大輔;逢坂直樹;八島栄次;M. HORI;赤池孝章;Y. Takubo and S. Yamashita
演示了色散调谐光纤激光器的光谱轮廓控制方法。色散调谐光纤激光器是一种快速且广泛可调的波长扫描激光器，无需机械可调谐滤波器。通过将主动锁模调制频率更改为与腔的基本重复率相匹配的相应工作波长来调谐激光中心波长。扫描频谱轮廓可以通过调制频率扫描来控制。通过应用预先计算的调制频率扫描，可以改善波长扫描光谱轮廓的平坦度。我们将色散调谐波长扫描激光器作为宽带光源应用于谱域光学相干断层扫描系统，并成功获得了OCT图像。通过对激光器应用非线性调制频率扫描而不是线性调制频率扫描来增强图像分辨率。所提出的色散调谐波长扫描激光器作为光谱灵活激光源的潜力得到了证明。
Spectral profile control method of a dispersion‐tuned fibre laser is demonstrated. A dispersion‐tuned fibre laser is a fast and widely tunable wavelength‐swept laser without mechanical tunable filters. The lasing centre wavelength is tuned by changing the active mode‐locking modulation frequency to that of the corresponding operating wavelength matching the fundamental repetition rate of the cavity. The sweep spectra profile can be controlled by modulation frequency sweep. By applying a pre‐calculated modulation frequency sweep, the flatness of the wavelength‐swept spectral profile can be improved. We applied the dispersion‐tuned wavelength‐swept laser to a spectral‐domain optical coherence tomography system as a wideband light source and successfully obtained OCT images. The image resolution is enhanced by applying a nonlinear modulation frequency sweep to the laser instead of linear modulation frequency sweep. The potential of the proposed dispersion‐tuned wavelength‐swept laser as a spectrally flexible laser source is demonstrated.